Hall effect on the triangular lattice
Abstract
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.
- Publication:
-
Physical Review B
- Pub Date:
- August 2008
- DOI:
- 10.1103/PhysRevB.78.085105
- arXiv:
- arXiv:0804.1062
- Bibcode:
- 2008PhRvB..78h5105L
- Keywords:
-
- 71.27.+a;
- 71.18.+y;
- 72.15.Gd;
- Strongly correlated electron systems;
- heavy fermions;
- Fermi surface: calculations and measurements;
- effective mass g factor;
- Galvanomagnetic and other magnetotransport effects;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 11 pages, 10 figures