Quantum oscillations in flux-grown SmB6 with embedded aluminum
S. M. Thomas, Xiaxin Ding, F. Ronning, V. Zapf, J. D. Thompson, Z., Fisk, J. Xia, and P. F. S. Rosa
TL;DR
This study detects de Haas-van Alphen oscillations in flux-grown SmB6 crystals, revealing embedded aluminum inclusions that influence magnetic properties without affecting transport behavior.
Contribution
It demonstrates that aluminum flux inclusions can produce observable quantum oscillations in SmB6, highlighting the impact of synthesis methods on magnetic measurements.
Findings
dHvA oscillations originate from embedded aluminum
Aluminum crystallizes in a preferred orientation within SmB6
Aluminum inclusions do not affect transport measurements
Abstract
SmB6 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.
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