Signature of surface state coupling in thin films of the topological Kondo insulator SmB6 from anisotropic magnetoresistance

M. Shaviv Petrushevsky, P. K. Rout, G. Levi, A. Kohn, Y. Dagan

Research output: Contribution to journalArticlepeer-review

Abstract

The temperature and thickness dependencies of the in-plane anisotropic magnetoresistance (AMR) of SmB6 thin films are reported. We find that the AMR changes sign from negative (ρ||<ρ¥) at high temperatures to positive (ρ||>ρ¥) at low temperatures. The temperature, Ts, at which this sign change occurs, decreases with increasing film thickness t and Ts vanishes for t> 30 nm. We interpret our results in the framework of a competition between two components: a negative bulk contribution and a positive surface AMR.

Original languageAmerican English
Article number085112
JournalPhysical Review B
Volume95
Issue number8
DOIs
StatePublished - 9 Feb 2017

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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