Anisotropic electrodynamics of layered metal 2H-NbSe2 -: art. no. 161103
Anisotropic electrodynamics of layered metal 2H-NbSe2 -: art. no. 161103
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DOI：
10.1103/physrevb.64.161103
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发表时间：
2001-10-15
影响因子：
3.7
通讯作者：
Bucher, E
中科院分区：
文献类型：
--
作者：
Dordevic, SV;Basov, DN;Bucher, E
我们在较宽的频率和温度范围内对层状金属 2H-NbSe2 进行了面内和面外红外反射率测量。两种极化的电动响应的特征是明确的德鲁德式吸收。尽管 1/tau (ab)(omega) 的函数形式与规范的 omega (2) 相关性不同，但面内散射率的绝对值符合朗道费米液体理论的预期。散射率张量的分析表明电子-声子耦合常数具有很强的各向异性。
We have performed both in-plane and out-of-plane infrared reflectance measurements on the layered metal 2H-NbSe2, in a broad frequency and temperature range. The electrodynamic response for both polarizations is characterized by a well-defined Drude-like absorption. The absolute values of the in-plane scattering rate are in accord with what is expected from Landau's Fermi-liquid theory, despite the fact that the functional form of 1/tau (ab)(omega) differs from canonical omega (2) dependence. Analysis of the scattering rate tensor is suggestive of strong anisotropy of the electron-phonon coupling constant.