Hall coefficient signals orbital differentiation in the Hund's metal Sr2RuO4

被引：25

作者：

Zingl, Manuel ^{[1
]}

Mravlje, Jernej ^{[2
]}

Aichhorn, Markus ^{[3
]}

Parcollet, Olivier ^{[1
,4
]}

Georges, Antoine ^{[1
,5
,6
,7
]}

机构：

[1] Flatiron Inst, Ctr Computat Quantum Phys, 162 5th Ave, New York, NY 10010 USA

[2] Jozef Stefan Inst, Jamova 39, Ljubljana, Slovenia

[3] Graz Univ Technol, NAWI Graz, Inst Theoret & Computat Phys, A-8010 Graz, Austria

[4] CEA, Inst Phys Theor IPhT, CNRS, UMR 3681, F-91191 Gif Sur Yvette, France

[5] Coll France, 11 Pl Marcelin Berthelot, F-75005 Paris, France

[6] Univ Paris Saclay, CNRS, Ctr Phys Theor, Ecole Polytech, F-91128 Palaiseau, France

[7] Univ Geneva, Dept Quantum Matter Phys, 24 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland

来源：

NPJ QUANTUM MATERIALS | 2019年 / 4卷 / 1期

基金：

欧洲研究理事会; 奥地利科学基金会;

关键词：

FERMI-SURFACE; BEHAVIOR; STATES;

D O I：

10.1038/s41535-019-0175-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Hall coefficient R-H of Sr2RuO4 exhibits a non-monotonic temperature dependence with two sign reversals. We show that this puzzling behavior is the signature of two crossovers, which are key to the physics of this material. The increase of R-H and the first sign change upon cooling are associated with a crossover into a regime of coherent quasiparticles with strong orbital differentiation of the inelastic scattering rates. The eventual decrease and the second sign change at lower temperature are driven by the crossover from inelastic to impurity-dominated scattering. This qualitative picture is supported by quantitative calculations of R-H(T) using the Boltzmann transport theory in combination with dynamical mean-field theory, taking into account the effect of spin-orbit coupling. Our insights shed new light on the temperature dependence of the Hall coefficient in materials with strong orbital differentiation, as observed in Hund's metals.

引用

页数：6

共 54 条

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