title: Kondo Breakdown and Quantum Oscillations in SmB_{6}.
abstract: Recent quantum oscillation experiments on SmB_{6} pose a paradox, for while the angular dependence of the oscillation frequencies suggest a 3D bulk Fermi surface, SmB_{6} 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.
authors.affiliation: Center for Materials Theory, Rutgers University, Piscataway, New Jersey, 08854, USA.
authors.forename: Onur
authors.initials: O
authors.lastname: Erten
authors.affiliation: Physics Department, City College of the City University of New York, New York, New York 10031, USA.
authors.forename: Pouyan
authors.initials: P
authors.lastname: Ghaemi
authors.affiliation: Center for Materials Theory, Rutgers University, Piscataway, New Jersey, 08854, USA.|Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom.
authors.forename: Piers
authors.initials: P
authors.lastname: Coleman