Rigol, Marcos ; Sriram Shastry, B. ; Haas, Stephan (2009) Effects of strong correlations and disorder in d-wave superconductors Physical Review B: Condensed Matter and Materials Physics, 79 (5). 052502_1-052502_4. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v79/i5/e052502
Related URL: http://dx.doi.org/10.1103/PhysRevB.79.052502
Abstract
We use exact diagonalization techniques to study the interplay between strong correlations, superconductivity, and disorder in a model system. We study an extension of the t-J model by adding an infinite-range d-wave superconductivity inducing term and disorder. Our work shows that in the clean case the magnitude of the order parameter is surprisingly small for low-hole filling, thus implying that mean-field theories might be least accurate in that important regime. We demonstrate that substantial disorder is required to destroy a d-wave superconducting state for low-hole doping. We provide the first bias free numerical results for the local density of states of a strongly correlated d-wave superconducting model, relevant for STM measurements at various fillings and disorders.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 50788 |
Deposited On: | 26 Jul 2011 12:38 |
Last Modified: | 18 May 2016 04:57 |
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