Magnetic resonance probing of ground state in the mixed valence correlated topological insulator SmB₆.

ABSTRACT: Introducing of topological insulator concept for fluctuating valence compound - samarium hexaboride - has recently initiated a new round of studies aimed to clarify the nature of the ground state in this extraordinary system with strong electron correlations. Here we discuss the data of magnetic resonance in the pristine single crystals of SmB₆ measured in 60 GHz cavity experiments at temperatures 1.8-300 K. The microwave study as well as the DC resistivity and Hall effect measurements performed for the different states of SmB₆ [110] surface prove definitely the existence of the layer with metallic conductivity increasing under lowering temperature below 5 K. Four lines with the g-factors g ≈ 2 are found to contribute to the ESR-like absorption spectrum that may be at

SUBMITTER: Demishev SV 

PROVIDER: S-EPMC5940907 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature