Chinese Physics B
Negative differential resistance and quantum oscillations in FeSb₂ with embedded antimony
Chinese Physics B · 28, 037104 (2019)
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Introduction
Low-temperature transport and magnetic torque are measured in FeSb₂ crystals containing embedded antimony. Current-controlled negative differential resistance appears below about 7 K, and the angular dependence of quantum oscillations carries a signature of oriented antimony inclusions.
A closer reading
The analysis disentangles multiple origins for unusual signals: Joule heating coupled to a low-temperature transition for the electrical nonlinearity, and inclusions for the oscillations. It avoids treating every anomaly as evidence for a new electronic state.