Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-08-03
Physica B 259-261 p. 1058 (1999)
Physics
Condensed Matter
Strongly Correlated Electrons
2 Pages, 2 Figures, Uses espcrc2.sty (included); Proceedings of the SCES98 conference, July 1998 Paris, France; To be publishe
Scientific paper
10.1016/S0921-4526(98)00775-3
The effect of a weak random potential on two-leg Hubbard ladders is investigated. The random potential is shown to induce Anderson localization except for attractive enough interactions, supressing completely d-wave superconductivity. These localization effects remain very strong even for many ladders coupled by Josephson coupling. Both dc and ac conductivities and localization lengths are obtained. Consequences for the superconducting ladder compound Sr$_x$Ca$_{14-x}$Cu$_{24}$O$_{41+\delta}$ are discussed.
Giamarchi Thierry
Orignac Edmond
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