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Cooling concept for the armature winding of high temperature superconducting motorMathur, Mohit. Ordonez, Juan C. January 2006 (has links)
Thesis (M.S.)--Florida State University, 2006. / Advisor Juan C. Ordonez, Florida State University, College of Engineering, Dept. of Mechanical Engineering. Title and description from dissertation home page (viewed Sept. 19, 2006). Document formatted into pages; contains x, 267 pages. Includes bibliographical references.
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Models for inhomogeneities and thermal fluctuations in two-dimensional superconductorsValdez-Balderas, Daniel, January 2007 (has links)
Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 126-133).
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Non-extensive statistics and high temperature superconductivityUys, Hermann 24 November 2005 (has links)
Please read the abstract in the section front of this document / Dissertation (MSc (Physics))--University of Pretoria, 2006. / Physics / unrestricted
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Magnetism and superconductivity in iron pnictides and iron chalcogenidesWright, Jack Daniel January 2013 (has links)
This thesis presents a study on several series of unconventional Fe-based superconductors; namely, derivatives of NaFeAs and LiFeAs, as well as molecular-intercalated FeSe. Primarily using muon spin rotation (SR), but also x-ray diffraction (XRD) and magnetic susceptibility measurements, the nature of both magnetic and superconducting phases within these systems is studied. Particular attention is focussed on how these states compete or coexist with one another. The aforementioned experimental techniques are first used to explore the phase diagram of NaFe1xCoxAs. This phase diagram includes regions of long-range antiferromagnetism and short-range order, that both coexist with superconductivity. Magnetism is gradually destroyed, primarily through a diminishment of the size of the ordered moment, as superconductivity is enhanced by Co substitution. This interplay is explored in detail. By contrast, superconductivity in LiFeAs cannot be enhanced by transition metal substitution, suggesting that it is intrinsically optimally-doped. I investigate this conclusion by studying the evolution of the penetration depth in superconducting compositions of LiFe1xCoxAs and LiFe1xNixAs, and comparing these data to those from other electron-doped systems. I also study an unusual and emergent magnetic phase in Li1yFe1+yAs. This work suggests that LiFeAs supports a superconducting phase that resembles those in other Fe-pnictides, but is uniquely close to an additional magnetic instability. I then move on to the study of a recently discovered series, based on FeSe intercalated with ammonia and various metals. I study both the penetration depth and the intrinsic magnetic phases in these systems using SR and compare them with other compounds based on FeSe. I find that these intercalated systems support spacially separated regions of dynamic magnetism and superconductivity and I discuss how much these phases depend on the precise chemical details of the intercalated layer. Finally, I return to the experimental study of NaFe1xCoxAs, extending the range of techniques employed by using high-field magnetometry and high-pressure SR. These studies reveal new features of this system that were not accessible using low-field and ambient-pressure methods. In particular, I show that the magnetic moment size in NaFeAs unexpectedly increases with pressure, suggesting that the electronic structure of this compound may be unique amongst known Fe-based superconductors.
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Flux creep in pulsed laser deposited superconducting YBa₂Cu₃O₇ thin filmsMaritz, E. J. (Erasmus Jacobus) 03 1900 (has links)
Thesis (PhD (Physics))--University of Stellenbosch, 2002. / Includes bibliography. / ENGLISH ABSTRACT: High temperature superconductivity is an important topic in contemporary solid state physics,
and an area of very active research. Due to it’s potential for application in low temperature
electronic devices, the material has attracted the attention of researchers in the electronic
engineering and material science fields alike. Moreover, from a fundamental point of view,
several questions remain unanswered, related to the origin of superconductivity of this class
of materials and the nature of quantised magnetic flux present in magnetised samples.
In this work, flux creep phenomena in a thin superconducting YBa₂Cu₃O₇ film deposited by
pulsed laser deposition, is investigated near the critical temperature 0 ≤ Tc – T ≤ 10 K. Creep
activation energy U0 and critical current density jc were determined as a function of
temperature close to Tc, providing important data to a problem of high-Tc superconductivity
which is still a matter of debate. In particular it is still an open question whether restoring the
temperature in a creep freezing experiment in fact restores the film to it's original state before
the freezing. The most important novel results concern the regime of critical fluctuations in
the vicinity Tc - T < 1 K.
We studied the isothermal relaxation of trapped magnetic flux, and determined that the long
time decay follows a power law, where the exponent is inversely proportional to the creep
activation energy. The temperature dependence of the critical current density jc(T) of the
YBa₂Cu₃O₇ film close to Tc was obtained during warming runs. It was determined that jc(T)
follows a square root dependence on T to high accuracy in the range 0.2 ≤ Tc – T ≤ 1.5 K.
During flux creep experiments an interesting phenomenon called creep freezing related to the
strong temperature dependence of the relaxation rate was observed. A pronounced slowing of
relaxation with only a small drop in temperature from a starting temperature close to Tc was
detected. Experiments were conducted by initiating an isothermal flux decay run. At a certain
point the temperature was slightly lowered, and the flux decay stopped within experimental
accuracy. When the temperature was restored to the initial value, the flux decay resumed at
the previous rate before cooling. An argument based on vortex drift velocity was employed to
explain the phenomenon qualitatively.
During the course of this investigation, a pulsed laser deposition (PLD) system was designed
and built from scratch. PLD involves the interaction of a focussed laser pulse with a multielemental
solid target material. Material ablated from the target forms a fast moving plume
consisting of atomic and molecular particles, directed away from the target, and towards a
usually heated substrate on which the particles condense layer by layer to form a thin film.
The substrate temperature and background gas are carefully controlled to be conductive to the
growth of a desired phase of the multi-elemental compound.
The PLD system proved to be quite versatile in the range of materials that could be deposited.
It was used to deposit thin films of different materials, most notable were good quality
superconducting YBa₂Cu₃O₇, thermochromic VO2, and magnetoresistive LaxCa1-xMnO3.
Metallic Au and Ag layers were also successfully deposited on YBa2Cu3O7 thin films, to
serve as protective coatings. The critical temperatures of the best superconducting films were
90 K as determined by resistivity measurement. The optimal deposition conditions to deposit
high quality superconducting YBa₂Cu₃O₇ thin films was found to be: deposition temperature
780°C, laser energy density 2-3 J/cm2, oxygen partial pressure 0.2 mbar, and target-substrate
distance 35 mm. This yields film with Tc ~ 90 K. It was found that deposition temperature
plays the predominant role in determining the quality of YBa₂Cu₃O₇ thin films deposited by
PLD. / AFRIKAANSE OPSOMMING: Hoë temperatuur supergeleiding is tans ’n aktuele onderwerp van vastetoestandfisika en dit is
’n gebied van baie aktiewe navorsing. Weens die potensiaal vir toepassings van hoë
temperatuur supergeleiers in elektronika, het dié klas materiale die aandag van fisici and
elektronici getrek. Verskeie fundamentele vraagstukke bly steeds onbeantwoord, veral met
betrekking tot die oorsprong van supergeleiding in hierdie materiale en die gedrag van
gekwantiseerde magnetiese vloed (“vortekse”) in gemagnetiseerde monsters.
In hierdie werk word diffusie van vortekse in dun supergeleidende YBa₂Cu₃O₇ films
ondersoek naby die kritieke temperatuur (0 ≤ Tc - T ≤ 10 K). Die temperatuur afhanklikheid
van die diffusie aktiveringsenergie U0 en die kritieke stroomdigtheid jc word bepaal naby Tc.
Dit verskaf belangrike inligting tot probleme in hoë temperatuur supergeleiding wat tans nog
onbeantwoord bly. In die besonder is dit steeds ’n ope vraag of die herstel van die
aanvanklike temperatuur in ’n vloedstollings eksperiment waarlik die film tot die
oorspronklike toestand herstel. Die belangrikste nuwe resultate hou verband met die gebied
van kritieke fluktuasies van die orde parameter in die omgewing 0 < Tc - T < 1 K.
Ons het die isotermiese ontspanning van vortekse verstrik in die kristalstruktuur bestudeer, en
bepaal dat die lang tydsverval ’n magsverwantskap handhaaf, waar die eksponent omgekeerd
eweredig is aan U0. Die temperatuur afhanklikheid van die kritieke stroomdigtheid jc(T) van
die YBa₂Cu₃O₇ film naby Tc is bepaal tydens verhittingslopies. Daar is bevind dat naby Tc, jc
’n vierkantswortel verband met T volg, tot hoë noukeurigheid in die gebied 0.2 ≤ Tc –
T ≤ 1.5 K.
Gedurende vorteksdiffusie eksperimente is ’n interessante verskynsel naamlik vloedstolling
(“flux freezing”) waargeneem. Dit hou verband met die sterk temperatuur afhanklikheid van
die vervaltempo van die magnetiese moment van ’n gemagnetiseerde film. ’n Skerp daling
van die vervaltempo, weens slegs ’n klein temperatuurdaling vanaf die begin temperatuur
naby Tc, is waargeneem. Gedurende eksperimente is daar aanvanklik ’n isotermiese
vloedontspanning teweeg gebring. Op ’n sekere tydstip is die temperatuur effens verlaag,
waarby die vloedontspanning tot stilstand gekom het binne grense van waarneming. Wanneer
die temperatuur weer herstel is na die oorspronklike, het die vloedontspanning voortgegaan
teen die tempo voor die temperatuurverlaging. ’n Verklaring wat gebaseer is op vorteks
dryfsnelheid was aan die hand gedoen om hierdie gedrag te verklaar.
’n Groot komponent van die projek was om die dun YBa₂Cu₃O₇ films self te vervaardig.
Tydens hierdie ondersoek, is ’n gepulseerde laser deposisie (“PLD”) sisteem eiehandig
ontwerp en gebou. PLD behels die interaksie van ’n gefokuseerde laser puls met ’n teiken
bestaande uit ’n multi-element vastestofverbinding. Materiaal wat verdamp (“ablate”) word,
vorm ’n snelbewegende pluim bestaande uit atomiese en molekulêre deeltjies. Dit beweeg
vanaf die teiken na ’n verhitte substraat, waarop die deeltjies kondenseer om laag vir laag ’n
dun film te vorm. Die substraat temperatuur en agtergrond gas word sorgvuldig beheer om die
groei van die verlangde fase van die multi-element verbinding teweeg te bring.
Die PLD sisteem is baie veeldoelig ten opsigte van die verskeidenheid materiale wat
suksesvol neergeslaan kan word. Dit was aangewend om verskillende materiale neer te slaan,
onder andere supergeleidende YBa₂Cu₃O₇, termochromiese VO2, en magnetoresistiewe
LaxCa1-xMnO3. Geleidende Au en Ag lagies is ook suksesvol neergeslaan op YBa₂Cu₃O₇ dun
films, om te dien as beskermingslagies. Die kritieke temperatuur van die beste
supergeleidende films was 90 K soos bepaal deur weerstandsmetings. Die optimale neerslaan
toestand vir hoë kwaliteit YBa₂Cu₃O₇ dun films was: substraat temperatuur 780°C, laser
energiedigtheid 2 - 3 J/cm2, suurstofdruk 0.2 mbar, en teiken-substraat afstand 35 mm. Daar is
bevind dat die substraat temperatuur die deurslaggewende rol speel tydens die neerslaan
proses om die kwaliteit van die supergeleidende films te bepaal.
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Tuning the dimensionality and interactions in transition metal oxides : a μSR studyBaker, Peter James January 2007 (has links)
This thesis is concerned with how the physical properties of transition metal oxides change due to chemical substitution or intercalation. Experiments using the muon-spin relaxation and rotation (μSR) techniques were carried out at the ISIS Facility (UK) and the Paul Scherrer Institute (CH). In conjunction with the μSR results, the results of heat capacity and magnetic susceptibility experiments are used to provide complementary information on the same samples. Investigations of the properties of the layered triangular lattice magnets NaNiO2 and LiNiO2 are presented. For NaNiO2, all three experimental techniques are used to provide a full survey of the thermodynamic and magnetic properties of this compound. For LiNiO2, μSR studies of notionally stoichiometric and Mg-doped samples were carried out. These showed that Mg doping causes a significant change in the magnetic dynamics of the material, but neither sample exhibits long-range magnetic order. The magnetic ordering of the extensively studied perovskite compounds LaTiO3 and YTiO3 is investigated using μSR. The results were in agreement with previous neutron diffraction studies of the two compounds, but clarified the orientation of the magnetic moments in LaTiO3. It was also possible to make a detailed comparison between the μSR results and those of dipole field calculations of the magnetic field at possible muon stopping sites, allowing these to be deduced and compared with results in other well characterized transition metal oxides. The two titanium chain compounds NaTiSi2O6 and TiOCl exhibit spin gap formation at unusually high temperatures due to unconventional dimerization mechanisms. A model allowing the comparison of X-ray diffraction data, dimerization, and the magnitude of the spin gap is proposed. This is tested against both magnetic susceptibility and μSR data for both compounds. For NaTiSi2O6 both experimental techniques are in reasonable agreement, whereas in TiOCl the results are conclusively different. The origin of this disparity in TiOCl is explored. The intercalation of organic chain molecules into Bi based high-temperature superconductors has previously been demonstrated to extend the interlayer spacing by a factor of up to three without changing the superconducting transition temperature. μSR is used to investigate the London penetration depth, as a function of interlayer spacing, of two series of such samples. The results show a simple trend corresponding to a constant density of superconducting electron pairs in each layer. The consequences of this result are discussed in the context of previously identified scaling relations between superconducting parameters. Results of experiments excluding the possibility of magnetic order and muon-organic radical formation in these samples are presented, as well a preliminary study of the field distributions in a mosaic of intercalated crystallites.
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Polarised neutron diffraction measurements of PrBa2Cu3O6+x and the Bayesian statistical analysis of such dataMarkvardsen, Anders Johannes January 2000 (has links)
The physics of the series Pr<sub>y</sub>Y<sub>1-y</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>6+x</sub>, and ability of Pr to suppress superconductivity, has been a subject of frequent discussions in the literature for more than a decade. This thesis describes a polarised neutron diffraction (PND) experiment performed on PrBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.24</sub> designed to find out something about the electron structure. This experiment pushed the limits of what can be done using the PND technique. The problem is one of a limited number of measured Fourier components that need to be inverted to form a real space image. To accomplish this inversion the maximum entropy technique has been employed. In some cases, the maximum entropy technique has the ability to increase the resolution of ‘inverted’ data immensely, but this ability is found to depend critically on the choice of constants used in the method. To investigate this a Bayesian robustness analysis of the maximum entropy method is carried out, resulting in an improvement of the maximum entropy technique for analysing PND data. Some results for nickel in the literature have been re-analysed and a comparison is made with different maximum entropy algorithms. Equipped with an improved data analysis technique and carefully measured PND data for PrBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.24</sub> a number of new interesting features are observed, putting constraints on existing theoretical models of Pr<sub>y</sub>Y<sub>1-y</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>6+x</sub> and leaving room for more questions to be answered.
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Structure, properties and chemistry of layered oxypnictidesCorkett, Alex J. January 2012 (has links)
This thesis reports the synthesis and characterisation of the layered oxypnictides Sr<sub>2</sub>MO<sub>3</sub>FeAs (M = Sc, V and Cr) and CeOMnAs. In these materials the choice of transition metal cation at the tetrahedral site in the arsenide layer chiefly dictates the physical properties that are observed. The bulk of this work has focussed on the development of a new family of iron arsenide superconductor with the general formula Sr<sub>2</sub>MO<sub>3</sub>FeAs (M = Sc, V, Cr). This structure is comprised of anti-PbO-type [FeAs]<sup>-</sup> layers which alternate with insulating [Sr<sub>2</sub>MO<sub>3</sub>]<sup>+</sup> oxide fragments that resemble a portion of the K<sub>2</sub>NiF<sub>4</sub> structure. In contrast to other FeAs parent materials, no member of the Sr<sub>2</sub>MO<sub>3</sub>FeAs family exhibits any strong evidence for long range Fe order or a tetragonal to orthorhombic distortion upon cooling. Attempts to electron and hole dope Sr<sub>2</sub>ScO<sub>3</sub>FeAs into the superconducting regime have as yet been unsuccessful. Although Sr<sub>2</sub>ScO<sub>3</sub>FeAs shows no evidence for Fe ordering, a checkerboard arrangement of Cr<sup>3+</sup> spins in the ab-plane is observed below 40 K (k = (½, ½, 0)) analogous to that seen in Pr<sub>2</sub>CuO<sub>4</sub>. The partial substitution of Fe<sup>2+</sup> (d<sup>6</sup>) by Co<sup>2+</sup> (d<sup>7</sup>) in Sr<sub>2</sub>CrO<sub>3</sub>Fe<sub>1-x</sub>Co<sub>x</sub>As has been shown to be a fruitful strategy for electron-doping this material into the superconducting regime with T<sub>c</sub> maximised at 18 K in Sr<sub>2</sub>CrO<sub>3</sub>Fe<sub>0.92</sub>Co<sub>0.08</sub>As. It is also established that this substitution influences the ordering on the Cr sub-lattice with a doubling in the size of the magnetic cell along the c axis (k = (½, ½, ½)). Sr<sub>2</sub>VO<sub>3</sub>FeAs, a rare example of an “undoped” superconductor (T<sub>c</sub> = 25 K), is shown to be electron-doped by mixed valence vanadium +3.13(5). Magnetometry measurements also reveal a series of magnetic transitions in Sr<sub>2</sub>VO<sub>3</sub>FeAs, however μSR and powder neutron diffraction studies suggest that this system is some way from commensurate long range order. In contrast to Sr<sub>2</sub>CrO<sub>3</sub>FeAs, electron-doping strategies in Sr<sub>2</sub>VO<sub>3</sub>FeAs have the effect of decreasing T<sub>c</sub> and ultimately suppressing superconductivity entirely as Sr<sub>2</sub>V<sub>1-x</sub>Ti<sub>x</sub>O<sub>3</sub>FeAs and Sr<sub>2</sub>VO<sub>3</sub>Fe<sub>1-x</sub>Co<sub>x</sub>As materials are over electron-doped. Sr<sub>2</sub>V<sub>1-x</sub>Mg<sub>x</sub>O<sub>3</sub>FeAs samples were also prepared, but rather than this strategy hole-doping the FeAs layer it preferentially oxidises vanadium towards V<sup>4+</sup>. This substitution also has a considerable effect on the superconducting critical temperature (T<sub>c</sub>) which is raised as high as 31 K in Sr<sub>2</sub>V<sub>0.775</sub>Mg<sub>0.225</sub>O<sub>3</sub>FeAs. The isovalent substitution of Sr<sup>2+</sup> by Ca<sup>2+</sup> in Sr<sub>2-x</sub>Ca<sub>x</sub>VO<sub>3</sub>FeAs has been shown to strongly influence the superconducting properties of this material and a clear correlation between the evolution of T<sub>c</sub> and the shape of the FeAs<sub>4</sub> tetrahedron has been established. These results demonstrate that superconductivity in iron-based superconductors is extremely sensitive to both electron count and the crystal structure. Finally, investigations into the manganese oxide arsenide CeOMnAs reveal room temperature ordering of Mn<sup>2+</sup> spins and a spin reorientation transition of Mn moments at 36 K. This transition is concomitant with Ce ordering and an apparent weak structural distortion, demonstrating that f electrons are able to dictate the orientation of Mn moments.
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Quantum materials explored by neutron scatteringBabkevich, Peter January 2012 (has links)
This thesis describes neutron scattering experiments on strongly correlated systems exhibiting a range of emergent phenomena: antiferromagnetism, charge order, superconductivity and multiferroicity. I have examined the La_{2}CoO_{4} compound which is a Mott insulator and orders antiferromagnetically near room temperature. The La_{2}CoO_{4} sample was studied using spherical neutron polarimetry and I present magnetic structure models to describe the two antiferromagnetic phases of the compound. Furthermore, the magnetic fluctuations have been investigated using neutron time-of-flight technique. This has allowed us to extract the dominant exchange interactions in the system. More interestingly, the work on La_{2}CoO_{4} presented in this thesis provides a basis for the experimental evidence of an hourglass dispersion in La_{5/3}Sr_{1/3}CoO_{4}, previously only observed in the copper oxide based superconductors. This dispersion has been understood in terms of a stripe ordered magnetic phase and was found to be well described by a linear spin-wave model. Neutron scattering experiments were also carried out on the new iron-based high-temperature superconductors, FeSe_{x}Te_{1−x}. A range of compositions were studied, including both antiferromagnetically ordered and superconducting. Below the superconducting phase transition temperature, a spin resonance mode was found centred on the antiferromagnetic wavevector. This is an important feature shared by many unconventional superconductors. The spin resonance intensity was found to reflect the order parameter of the superconducting state. Polarised inelastic neutron scattering experiments have revealed a small anisotropy between the in-plane and out-of-plane magnetic fluctuations at the resonance. This anisotropy cannot be readily explained by the usual anisotropic terms in the Hamiltonian. This could be evidence of new physics in the FeSe_{x}Te_{1−x} superconductors. Finally, I have studied CuO – a high-temperature multiferroic. Analysis of polarised neutron diffraction experiments shows that the magnetic domain population can be varied using an externally applied electric field. This unambiguously demonstrates coupling between the magnetic and ferroelectric degrees of freedom. Using representation analysis I derive the incommensurate magnetic structure in the multiferroic phase. The origin of the magnetoelectric coupling is consistent with models based on the inverse Dzyaloshinskii-Moriya interaction.
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Numerical studies of the magnetic properties of double layer system =: 雙層系統的磁性質之數値硏究. / 雙層系統的磁性質之數値硏究 / Numerical studies of the magnetic properties of double layer system =: Shuang ceng xi tong de ci xing zhi zhi shu zhi yan jiu. / Shuang ceng xi tong de ci xing zhi zhi shu zhi yan jiuJanuary 2002 (has links)
Tam Ka Ming. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2002. / Includes bibliographical references (leaves 142-145). / Text in English; abstracts in English and Chinese. / Tam Ka Ming. / Acknowledgement --- p.ii / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Models for Many Body Systems --- p.1 / Chapter 1.2 --- High Temperature Superconductor --- p.5 / Chapter 1.3 --- Reasons of Study Double Layers --- p.9 / Chapter 1.4 --- "Incommensurate Magnetic Excitation, Order Parameters" --- p.10 / Chapter 1.5 --- Thesis Organization --- p.10 / Chapter 2 --- Monte Carlo Methods --- p.12 / Chapter 2.1 --- General Aspects of Monte Carlo Simulation --- p.12 / Chapter 2.2 --- "Markov Chain, Metropolis Algorithm, Heat-Bath Algorithm" --- p.18 / Chapter 2.3 --- Quantum Monte Carlo --- p.21 / Chapter 2.4 --- Variational Quantum Monte Carlo --- p.22 / Chapter 2.5 --- Green Function Monte Carlo --- p.27 / Chapter 2.6 --- Auxiliary Field Monte Carlo --- p.35 / Chapter 2.7 --- Summary of Quantum Monte Carlo --- p.38 / Chapter 3 --- Constrained Path Monte Carlo --- p.40 / Chapter 3.1 --- Various Formulas Used in Constrained Path Monte Carlo --- p.40 / Chapter 3.2 --- Constrained Path Monte Carlo --- p.47 / Chapter 3.3 --- Constrained Path Approximation --- p.51 / Chapter 3.4 --- Measurements --- p.52 / Chapter 3.5 --- Method of Avoiding Numerical Instability --- p.55 / Chapter 4 --- Parallelisation of CPMC Program --- p.57 / Chapter 4.1 --- Architecture of Parallel Machine --- p.57 / Chapter 4.2 --- Communication Methods in Parallel Program --- p.65 / Chapter 4.3 --- Comparison of Parallel and Serial Program --- p.74 / Chapter 4.4 --- Measure of Parallel Program --- p.85 / Chapter 4.5 --- Analysis of Serial CPMC Program --- p.89 / Chapter 4.6 --- Analysis of the Parallel CPMC Program --- p.93 / Chapter 5 --- Results from CPMC --- p.101 / Chapter 5.1 --- Hubbard Model with Next Nearest Neighbour Hopping --- p.101 / Chapter 5.2 --- Spin and Charge Correlations --- p.104 / Chapter 5.3 --- Vertex Contributions --- p.111 / Chapter 6 --- Mean Field Calculations of bilayer --- p.119 / Chapter 6.1 --- Objective --- p.119 / Chapter 6.2 --- Theoretical Model --- p.121 / Chapter 6.3 --- Method of Solving the Model --- p.122 / Chapter 6.4 --- Finding Susceptibility by RPA --- p.131 / Chapter 6.5 --- Results --- p.136 / Chapter 6.6 --- Summary --- p.140 / Chapter 7 --- Summary --- p.141 / Bibliography --- p.142
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