Temperature-Dependent Fermi Surface Evolution in Heavy Fermion CeIrIn5
Temperature-Dependent Fermi Surface Evolution in Heavy Fermion CeIrIn5
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DOI：
10.1103/physrevlett.108.016402
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发表时间：
2012-01-05
影响因子：
8.6
通讯作者：
Kotliar, G.
中科院分区：
文献类型：
--
作者：
Choi, Hong Chul;Min, B. I.;Kotliar, G.
我们从理论上解决的重费米子费米面（FS）的演化作为温度（T）的函数，使用第一性原理动力学平均场理论方法结合密度泛函理论。我们专注于CeIrIn 5中的原型重电子。在冷却时，量子振荡频率和回旋质量都表现出对数标度行为[类似于ln（T-0/T）]，分别具有不同的特征温度T-0 = 130和50 K。在低T下电子FS的扩大伴随着T = 10-50 K附近的拓扑变化。在50 K附近观察到的电阻率相干峰是非相干4f电子与spd导电电子在费米能级（E-F）上的结合与相干4f电子的形成竞争的结果。
We address theoretically the evolution of the heavy fermion Fermi surface (FS) as a function of temperature (T), using a first principles dynamical mean-field theory approach combined with density functional theory. We focus on the archetypical heavy electrons in CeIrIn5. Upon cooling, both the quantum oscillation frequencies and cyclotron masses show logarithmic scaling behavior [similar to ln(T-0/T)] with different characteristic temperatures T-0 = 130 and 50 K, respectively. The enlargement of the electron FSs at low T is accompanied by topological changes around T = 10-50 K. The resistivity coherence peak observed at T similar or equal to 50 K is the result of the competition between the binding of incoherent 4f electrons to the spd conduction electrons at Fermi level (E-F) and the formation of coherent 4f electrons.