Kondo Breakdown and Quantum Oscillations in SmB6

Onur Erten, Pouyan Ghaemi, Piers Coleman

Research output: Contribution to journalArticle

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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

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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