Quantum Oscillations in Insulators
During the last five years, experimental studies of a range of different materials have demonstrated the coexistence of quantum oscillations of magnetization and electrical insulation. This combination presents an apparent paradox, since quantum oscillations usually indicate a Fermi surface of electrons, which is at odds with the lack of electrical conduction. These observations have kicked off a flurry of new experimental findings and theoretical ideas, but the central mystery of the origin of the oscillations still does not have a consensus solution.
This workshop, which extends for four hours over two days, aims to bring together experimental and theoretical leaders in the study of quantum oscillations in insulators. Our focus is on presenting new experimental findings, reviewing the commonalities and differences between different materials — including SmB6, YbB12, and WTe2 —, and on discussing the candidate theories.
Main Program
Bulk Fermi surfaces in bulk unconventional insulators
by Suchitra Sebastian, Cambridge University
Magnetism in SmB6
by Collin Broholm, Johns Hopkins University
Quantum Oscillations in Resistivity and Magnetization of Insulators
by Lu Li, University of Michigan
Intrinsic Landau Quantization in WTe2 Insulators
by Sanfeng Wu, Princeton University
Quantum oscillations in the resistivity of an excitonic insulator
by Patrick Lee, Massachusetts Institute of Technology
Panel Discussion
panelists: Leslie Schoop, G. Baskaran, Piers Coleman, Nigel Cooper, T. Senthil
moderator: Art Ramirez
Late-breaking session
Quantum oscillations in 2D insulators induced by graphite gates
by Kin Fai Mak, Cornell University
Intrinsic low-energy magnetic excitations detected in SmB6 by μSR
by Jeff Sonier, Simon Fraser University
Bulk Transport Through Defects in Floating Zone and Al-flux-grown Samarium Hexaboride
by Cagliyan Kurdak, University of Michigan
Evidence for Specific Heat Quantum Oscillations in SmB6
by Patrick LeBarre, University of California Santa Cruz
Anomalous Quantum Oscillations in a Heterostructure of Graphene on a Proximate Quantum Spin Liquid
by Valentin Leeb, Technical University Munich
Majoranas in Mixed Valence Insulators
by Chandra Varma, University of California Berkeley
Survival of neutral fermions into the high-magnetic-field Kondo-metal state of YbB₁₂
by John Singleton, Los Alamos National Lab