Kondo Breakdown and Quantum Oscillations in SmB6

被引：86

作者：

Erten, Onur ^{[1
]}

Ghaemi, Pouyan ^{[2
]}

Coleman, Piers ^{[1
,3
]}

机构：

[1] Rutgers State Univ, Ctr Mat Theory, Piscataway, NJ 08854 USA

[2] CUNY City Coll, Dept Phys, New York, NY 10031 USA

[3] Royal Holloway Univ London, Dept Phys, Egham TW20 0EX, Surrey, England

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 04期

关键词：

FERMI-SURFACE; GAP; CONDUCTIVITY; STATES;

D O I：

10.1103/PhysRevLett.116.046403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent quantum oscillation experiments on SmB6 pose a paradox, for while the angular dependence of the oscillation frequencies suggest a 3D bulk Fermi surface, SmB6 remains robustly insulating to very high magnetic fields. Moreover, a sudden low temperature upturn in the amplitude of the oscillations raises the possibility of quantum criticality. Here we discuss recently proposed mechanisms for this effect, contrasting bulk and surface scenarios. We argue that topological surface states permit us to reconcile the various data with bulk transport and spectroscopy measurements, interpreting the low temperature upturn in the quantum oscillation amplitudes as a result of surface Kondo breakdown and the high frequency oscillations as large topologically protected orbits around the X point. We discuss various predictions that can be used to test this theory.

引用

页数：5

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