Hall constant of strongly correlated electrons on a ladder

Details Hall constant of strongly correlated electrons on a ladder Hall constant of strongly correlated electrons on a ladder

1999-09-10

arxiv.org/abs/cond-mat/9909159v1

Physics

Condensed Matter

Strongly Correlated Electrons

RevTeX, 5 pages, 3 figures, to appear in Phys. Rev. Lett

Scientific paper

The Hall constant R_H in a tight-binding model of correlated electrons on a ladder at T=0 is expressed in terms of derivatives of the ground state energy with respect to external magnetic and electric fields. This novel method is used for the analysis of the t-J model on finite size ladders. It is found that for a single hole R_H is hole-like and close to the semiclassical value, while for two holes it can vary with ladder geometry. In odd-leg ladders, R_H behaves quite regularly changing sign as a function of doping, the variation being quantitatively close to experimental results in cuprates.

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