Spin Injection and Inverse Edelstein Effect in the Surface States of Topological Kondo Insulator SmB6

Abstract

There has been considerable interest in exploiting the spin degrees of freedom of electrons for potential information storage and computing technologies. Topological insulators (TI), a class of quantum materials, have special gapless edge/surface states, where the spin polarization of the Dirac fermions is locked to the momentum direction. This spin-momentum locking property gives rise to very interesting spin-dependent physical phenomena such as the Edelstein and inverse Edelstein effects. However, the spin injection in pure surface states of TI is very challenging because of the coexistence of the highly conducting bulk states. Here, we experimentally demonstrate the spin injection and observe the inverse Edelstein effect in the surface states of a topological Kondo insulator, SmB6. At low temperatures when only surface carriers are present, a clear spin signal is observed. Furthermore, the magnetic field angle dependence of the spin signal is consistent with spin-momentum locking property of surface states of SmB6.

15 pages, 5 figures, Accepted to Nature Communications (In Press)

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Cited by in corpus (16)

• Quantum Materials for Spin and Charge Conversion
• Observation of Inverse Edelstein Effect in Rashba-Split 2DEG between SrTiO3 and LaAlO3 at Room Temperature
• Spin Pumping of an Easy-Plane Antiferromagnet Enhanced by Dzyaloshinskii-Moriya Interaction
• Probe of Spin Dynamics in Superconducting NbN Thin Films via Spin Pumping
• Magnetic and defect probes of the SmB${}_6$ surface state
• Strong enhancement of the Edelstein effect in f-electron systems
• Definitive Surface Magnetotransport Study of SmB${}_6$
• Electrical detection of surface spin polarization of candidate topological Kondo insulator SmB6
• Inverse Edelstein effect of the surface states of a topological insulator
• Spin-selective tunneling from nanowires of the candidate topological Kondo insulator SmB6
• Theory of inverse Rashba-Edelstein effect induced by spin pumping into a two-dimensional electron gas
• Spin-charge conversion in disordered two-dimensional electron gases lacking inversion symmetry
• Efficient Edelstein effects in one-atom-layer Tl-Pb compound
• Electrical detection of the inverse Edelstein effect on the surface of SmB${}_6$
• Theory of the inverse Rashba-Edelstein effect induced by thermal spin injection
• Spin Pumping into two-dimensional systems