Phys. Rev. B 78, 085105 (2008) [11 pages]Hall effect on the triangular latticeReceived 8 April 2008; published 6 August 2008 We investigate the high-frequency Hall effect on a two-dimensional triangular lattice with nearest-neighbor hopping and a local Hubbard interaction. The complete temperature and doping dependencies of the high-frequency Hall coefficient RH are evaluated analytically and numerically for small, intermediate, and strong interactions using various approximation schemes. We find that RH follows the semiclassical 1/qn∗ law near T=0 but exhibits a striking T-linear behavior with an interaction- and doping-dependent slope at high temperature. We compare our results with previous theories as well as Hall measurements performed in cobaltates. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.78.085105
DOI:
10.1103/PhysRevB.78.085105
PACS:
71.27.+a, 71.18.+y, 72.15.Gd
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