Pseudospin in LaO<sub>1/2</sub>F<sub>1/2</sub>BiX<sub>2</sub> (X=S,Se)
ORAL
Abstract
The layered material Re(O,F)Bi(S,Se)2 has drawn attention for its superconductivity. In addition to experiments that suggest unconventional superconductivity [1,2], an upper critical field (Hc2) considerably surpassing the Pauli limit has been found for in-plane fields [3,4]. In this talk, we will discuss the electronic valence bands and their spin states in LaO1/2F1/2BiX2 from DFT calculations and symmetry-based model analyses. A mechanism that accounts for the high Hc2 will also be presented.
[1] Hoshi et al., Phys, Rev. B 97, 094509 (2018).
[2] Ota et al., Phys. Rev. Lett. 118, 167002 (2017).
[3] Chan et al., Phys. Rev. B 97, 104509 (2018).
[4] Hoshi et al., Sci Rep 12, 288 (2022).
[1] Hoshi et al., Phys, Rev. B 97, 094509 (2018).
[2] Ota et al., Phys. Rev. Lett. 118, 167002 (2017).
[3] Chan et al., Phys. Rev. B 97, 104509 (2018).
[4] Hoshi et al., Sci Rep 12, 288 (2022).
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Presenters
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TATSUYA SHISHIDOU
University of Wisconsin - Milwaukee
Authors
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TATSUYA SHISHIDOU
University of Wisconsin - Milwaukee
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Han Gyeol Suh
University of Wisconsin - Milwaukee
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Yue YU
University of Wisconsin-Milwaukee
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Philip Brydon
University of Otago
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Daniel F Agterberg
University of Wisconsin - Milwaukee
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Michael Weinert
University of Wisconsin - Milwaukee