Normal-state Hall angle and magnetoresistance in quasi-2D heavy fermion CeCoIn5 near a quantum critical point
Normal-state Hall angle and magnetoresistance in quasi-2D heavy fermion CeCoIn5 near a quantum critical point
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DOI：
10.1143/jpsj.73.5
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发表时间：
2003-05
影响因子：
1.7
通讯作者：
Y. Nakajima;K. Izawa;Y. Matsuda;S. Uji;T. Terashima;H. Shishido;R. Settai;Y. Ōnuki;H. Kontani
中科院分区：
文献类型：
--
作者：
Y. Nakajima;K. Izawa;Y. Matsuda;S. Uji;T. Terashima;H. Shishido;R. Settai;Y. Ōnuki;H. Kontani
准二维（2D）重费米子超导体CeCoIn 5 中测量了正常状态霍尔效应和磁阻（MR）。在非费米液体区域，电阻率 ρ x x 表现出几乎完美的 T 线性依赖性，霍尔角随着 cot θ H ∝ T 2 变化，并且 MR 显示出强烈违反科勒定律。我们证明了 MR 和霍尔电导率之间的新颖关系 Δρ x x /ρ x x ∝(σ x y ρ x x ) 2 。这些结果与高 T c 铜酸盐的正常态特性惊人地相似，表明在量子临界点附近存在准二维反铁磁涨落时具有普遍的输运特性。
The normal-state Hall effect and magnetoresisitance (MR) have been measured in the quasi two dimensional (2D) heavy fermion superconductor CeCoIn 5 . In the non-Fermi liquid region where the reistivity ρ x x exhibits an almost perfect T -linear dependence, the Hall angle varies as cot θ H ∝ T 2 and MR displays a strong violation of Kohler's rule. We demonstrate a novel relation between the MR and the Hall conductivity, Δρ x x /ρ x x ∝(σ x y ρ x x ) 2 . These results bear a striking resemblance to the normal-state properties of high- T c cuprates, indicating universal transport properties in the presence of quasi-2D antiferromagnetic fluctuations near a quantum critical point.