TRIUMF

Exp. No.

M1511 — Approved

Title of Experiment

Investigation of Ferromagnetism and the Nature of Magnetic Impurities in SmB6

Spokesperson(s) for Group

Safety Coordinator(s) for Group

Current Members of Group

Name Institution Status % of research time devoted to experiment
J. Paglione University of Maryland Professor 25%
J.E. Sonier Simon Fraser University Professor 25%
K. Akintola Simon Fraser University Student (PhD) 25%
A. Fang Simon Fraser University Student (Graduate)
A. Pal Simon Fraser University PDF
S.R. Saha University of Maryland PDF 25%
X.F. Wang University of Maryland PDF 25%

Abstract

Topological insulators are materials possessing a strange quantum state characterized by an electrically insulating bulk and topologically-protected metallic surface states. The heavy-fermion compound SmB6 is believed to be a so-called ``topological Kondo insulator''. Experiments probing the surface have provided evidence for topological metallic surface states. Magnetic impurity doping is expected to open an energy gap in the topological surface state. We aim to use μSR to investigate pure and Fe-doped SmB6 single crystals, in order to elucidate and correlate magnetism with the topological behaviour.