Magnetoresistance of YBa2Cu3O7 in the cold spots model
Abstract
We calculate the in-plane magnetoresistance Δρxx/ρxx of YBa2Cu3O7 in a magnetic field applied perpendicular to the CuO2 planes for the ``cold spots'' model. In this model, the electron relaxation time τ2~1/T2 at small regions on the Fermi surface near the Brillouin zone diagonals is much longer than the relaxation time τ1~1/T at the rest of the Fermi surface (T is temperature). In qualitative agreement with the experiment, we find that Kohler's rule is strongly violated, but the ratio Δρxx/ρxx tan2θH, where tan θH is the Hall angle, is approximately temperature independent. We find the ratio is about 5.5, which is of the same order of magnitude as in the experiment.
- Publication:
-
Physical Review B
- Pub Date:
- January 1999
- DOI:
- 10.1103/PhysRevB.59.207
- arXiv:
- arXiv:cond-mat/9807058
- Bibcode:
- 1999PhRvB..59..207Z
- Keywords:
-
- 74.72.-h;
- 72.15.Gd;
- 72.15.Lh;
- 74.25.Fy;
- Cuprate superconductors;
- Galvanomagnetic and other magnetotransport effects;
- Relaxation times and mean free paths;
- Transport properties;
- Condensed Matter - Superconductivity
- E-Print:
- RevTeX, 4 pages, 6 figures. V.2: 2 references added