Temperature dependence of quantum oscillations from non-parabolic dispersions

The phase offset of quantum oscillations is commonly used to experimentally diagnose topologically non-trivial Fermi surfaces. This methodology, however, is inconclusive for spin-orbit-coupled metals where \(\pi\)-phase-shifts can also arise from non-topological origins. Here, we show that the linea...

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Veröffentlicht in:arXiv.org 2022-03
Hauptverfasser: Guo, Chunyu, Alexandradinata, A, Putzke, Carsten, Estry, Amelia, Tu, Teng, Kumar, Nitesh, Feng-Ren, Fan, Zhang, Shengnan, Wu, Quansheng, Yazyev, Oleg V, Shirer, Kent R, Bachmann, Maja D, Peng, Hailin, Bauer, Eric D, Ronning, Filip, Sun, Yan, Chandra Shekhar, Felser, Claudia, Moll, Philip J W
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Sprache:eng
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Zusammenfassung:The phase offset of quantum oscillations is commonly used to experimentally diagnose topologically non-trivial Fermi surfaces. This methodology, however, is inconclusive for spin-orbit-coupled metals where \(\pi\)-phase-shifts can also arise from non-topological origins. Here, we show that the linear dispersion in topological metals leads to a \(T^2\)-temperature correction to the oscillation frequency that is absent for parabolic dispersions. We confirm this effect experimentally in the Dirac semi-metal Cd\(_3\)As\(_2\) and the multiband Dirac metal LaRhIn\(_5\). Both materials match a tuning-parameter-free theoretical prediction, emphasizing their unified origin. For topologically trivial Bi\(_2\)O\(_2\)Se, no frequency shift associated to linear bands is observed as expected. However, the \(\pi\)-phase shift in Bi\(_2\)O\(_2\)Se would lead to a false positive in a Landau-fan plot analysis. Our frequency-focused methodology does not require any input from ab-initio calculations, and hence is promising for identifying correlated topological materials.
ISSN:2331-8422
DOI:10.48550/arxiv.1910.07608