We use the density matrix renormalization group to study the quantum
transitions that occur in the half-filled one-dimensional fermionic Hubbard
model with onsite potential disorder. We find a transition from the gapped
Mott phase with algebraic spin correlations to a gapless spin-disordered phase
beyond a critical strength of the disorder 1 c ss U= 2. Both the transitions in
the charge and spin sectors are shown to be coincident. We also establish the
finite-size corrections to the charge gap and the spin-spin correlation length
in the presence of disorder and using a finite-size-scaling analysis we obtain
the zero temperature phase diagram of the various quantum phase transitions
that occur in the disorder-interaction plane.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:17517 |
| Date | 30 October 1998 |
| Creators | Pai, R. V., Punnoose, A., Römer, R. A. |
| Publisher | Technische Universität Chemnitz |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | doc-type:preprint, info:eu-repo/semantics/preprint, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
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