Quantum Oscillations in Flux-Grown SmB6 with Embedded Aluminum

Sm B6 is a candidate topological Kondo insulator that displays surface conduction at low temperatures. Here, we perform torque magnetization measurements as a means to detect de Haas–van Alphen (dHvA) oscillations in SmB6 crystals grown by aluminum flux. We find that dHvA oscillations occur in singl...

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Bibliographic Details
Published in:Physical review letters 2019-04, Vol.122 (16), p.166401
Main Authors: Thomas, S M, Ding, Xiaxin, Ronning, F, Zapf, V, Thompson, J D, Fisk, Z, Xia, J, Rosa, P F S
Format: Article
Language:English
Subjects:
Aluminum
Crystal growth
Crystals
Cubic lattice
Flux
Inclusions
MATERIALS SCIENCE
Oscillations
Preferred orientation
Single crystals
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Summary:Sm B6 is a candidate topological Kondo insulator that displays surface conduction at low temperatures. Here, we perform torque magnetization measurements as a means to detect de Haas–van Alphen (dHvA) oscillations in SmB6 crystals grown by aluminum flux. We find that dHvA oscillations occur in single crystals containing embedded aluminum, originating from the flux used to synthesize SmB6. Measurements on a sample with multiple, unconnected aluminum inclusions show that aluminum crystallizes in a preferred orientation within the SmB6 cubic lattice. The presence of aluminum is confirmed through bulk susceptibility measurements, but does not show a signature in transport measurements. We discuss the ramifications of our results.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.122.166401