Kondo Breakdown and Quantum Oscillations in SmB6

Onur Erten, Pouyan Ghaemi, Piers Coleman

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Article number046403
JournalPhysical Review Letters
Volume116
Issue number4
DOIs
StatePublished - Jan 29 2016
Externally publishedYes

Fingerprint

breakdown
oscillations
paradoxes
Fermi surfaces
orbits
predictions
magnetic fields
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kondo Breakdown and Quantum Oscillations in SmB6. / Erten, Onur; Ghaemi, Pouyan; Coleman, Piers.

In: Physical Review Letters, Vol. 116, No. 4, 046403, 29.01.2016.

Research output: Contribution to journalArticle

Erten, Onur ; Ghaemi, Pouyan ; Coleman, Piers. / Kondo Breakdown and Quantum Oscillations in SmB6. In: Physical Review Letters. 2016 ; Vol. 116, No. 4.
@article{643c81af47814f29b524c6edf2c981eb,
title = "Kondo Breakdown and Quantum Oscillations in SmB6",
abstract = "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.",
author = "Onur Erten and Pouyan Ghaemi and Piers Coleman",
year = "2016",
month = "1",
day = "29",
doi = "10.1103/PhysRevLett.116.046403",
language = "English (US)",
volume = "116",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "4",

}

TY - JOUR

T1 - Kondo Breakdown and Quantum Oscillations in SmB6

AU - Erten, Onur

AU - Ghaemi, Pouyan

AU - Coleman, Piers

PY - 2016/1/29

Y1 - 2016/1/29

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84957831348&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84957831348&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.116.046403

DO - 10.1103/PhysRevLett.116.046403

M3 - Article

AN - SCOPUS:84957831348

VL - 116

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 4

M1 - 046403

ER -