Quantum oscillations of electrical resistivity in an insulator

@article{Xiang2018QuantumOO,
  title={Quantum oscillations of electrical resistivity in an insulator},
  author={Ziji Xiang and Yuichi Kasahara and T. Asaba and B. Lawson and C. Tinsman and Lu Chen and Kunihisa Sugimoto and S. Kawaguchi and Y. J. Sato and G. Li and Shu-hua Yao and Y. L. Chen and Fumitoshi Iga and John Singleton and Yuji Matsuda and Lu Li},
  journal={Science},
  year={2018},
  volume={362},
  pages={65 - 69}
}
Insulator or a metal? When a metal is cooled to low temperatures and placed in an external magnetic field, its resistivity may oscillate as the magnitude of the field is varied. Seeing these so-called quantum oscillations in an insulating material would be very unusual. Xiang et al. report such findings in the insulator ytterbium dodecaboride (YbB12) (see the Perspective by Ong). In addition to oscillations in resistivity, the authors observed oscillations in the magnetic torque. The results… 

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References

SHOWING 1-10 OF 53 REFERENCES

Unconventional Fermi surface in an insulating state

Probing the insulating state of SmB6 When a metal is subjected to a strong magnetic field, its electrons start rearranging into new energy levels, causing its electronic properties to oscillate as a

Quantum oscillations in insulators with neutral Fermi surfaces

We develop a theory of quantum oscillations in insulators with an emergent fermi sea of neutral fermions minimally coupled to an emergent $U(1)$ gauge field. As pointed out by Motrunich (Phys. Rev. B

Majorana Fermi Sea in Insulating SmB6: A proposal and a Theory of Quantum Oscillations in Kondo Insulators

In an exciting development, SmB6, a Kondo insulator has been shown to exhibit bulk quantum oscillations. We propose that SmB6 is a bulk scalar Majorana Fermi Liquid} (MFL) with a finite gap for

Quantum Oscillation in Narrow-Gap Topological Insulators.

A two-band model with inverted band structure is shown that the periodically narrowing hybridization gap in magnetic fields can induce the oscillation of low-energy density of states in the bulk, which is observable provided that the activation energy is small and comparable to the Landau level spacing.

Skyrme Insulators: Insulators at the Brink of Superconductivity.

This work argues that the loss of topological protection in a superconductor gives rise to an insulating ground state, and introduces the concept of a Skyrme insulator to describe the coherent dielectric state that results from the topological failure of superflow carried by a complex-vector order parameter.

Chemical potential asymmetry and quantum oscillations in insulators

We present a theory of quantum oscillations in insulators that are particle-hole symmetric and non-topological but with arbitrary band dispersion, at both zero and non-zero temperature. At

Two-dimensional Fermi surfaces in Kondo insulator SmB6

The electronic structure of SmB6 in high magnetic fields is traced and it is found that it does indeed have two-dimensional surface states, and this material is confirmed to be a topological insulator.

Quantum Oscillations without a Fermi Surface and the Anomalous de Haas-van Alphen Effect.

It is shown that, in contrast to this canonical situation, there can be quantum oscillations even for band insulators of certain types, showing strong deviations from LK theory.

How Are Heavy and Itinerant Electrons Born in a Dilute Kondo Alloy

We report a continuous evolution of Fermi surface properties with temperature in a dilute Kondo alloy of Ce 0.02 La 0.98 Ru 2 Si 2 via measurements of the de Haas–van Alphen (dHvA) effect. The

Topological surface state in the Kondo insulator samarium hexaboride.

Thickness-dependent transport measurements on doped SmB6 are reported, and it is shown that magnetic and non-magnetic doping results in contrasting behaviour that supports the conclusion that SmB 6 shows virtually no residual bulk conductivity.
...