Inelastic scattering rates in d-wave superconductors

被引:6
作者
Paaske, J
Khveshchenko, DV
机构
[1] Univ Copenhagen, Orsted Lab, DK-2100 Copenhagen, Denmark
[2] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA
来源
PHYSICA C | 2000年 / 341卷
关键词
D O I
10.1016/S0921-4534(00)00472-X
中图分类号
O59 [应用物理学];
学科分类号
摘要
The inelastic scattering rates of quasiparticles in a two-dimensional d-wave superconductor, which arise from interactions with either acoustic phonons or other quasiparticles, are calculated within second order perturbation theory. We discover a strong enhancement of scattering with collinear momenta, brought about by the special kinematics of the two-dimensional fermions with Dirac-like spectrum near the nodes of the d-wave order parameter. In the case of a local instantaneous interparticle potential we find that either an RPA-type resummation of the perturbation series or an inclusion of non-linear corrections to the Dirac spectrum is called for in order to obtain a finite scattering rate in the limit w/T --> 0. In either way, we find drastic changes in the scattering rate, as compared to the naively expected cubic temperature dependence.
引用
收藏
页码:265 / 266
页数:2
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