The Hall constant of correlated electrons: Cluster calculation for Hubbard model

Mahesh, PN and Shastry, BS (1996) The Hall constant of correlated electrons: Cluster calculation for Hubbard model. In: Physica B, 223-22 (1-4). pp. 501-505.

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Abstract

We calculate the Hall constant $R_H(\omega,T)$ for the high $T_c$ materials $La_{2-x}Sr_xCuO_4$ and $YBa_2Cu_3O_{7-x}$ using the 2D Hubbard model, on a cluster of dimension (2×3). Close to half filling, at low temperatures and high frequency, we find that $R_H(\omega)$ is electronlike in the weak correlation regime and in the strong correlation regime it is holelike with roughly 1/T+const form. At high frequencies, for $La_{2-x}Sr_xCuO_4$ we obtain a change in the sign of $R_H(\omega)$ at $x\sim 0.3$, which is in good agreement with the experimental data.

Item Type:	Journal Article
Publication:	Physica B
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	03 Sep 2007
Last Modified:	19 Sep 2010 04:37
URI:	http://eprints.iisc.ac.in/id/eprint/10819

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