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Superconducting properties of BaBi at ambient and high pressures

Herein, we report the preparation and characterization of BaBi 3 clarified by DC magnetic susceptibility, powder X-ray diffraction (XRD), and electrical transport. The superconducting properties of BaBi 3 were elucidated through the magnetic and electrical transport properties in a wide pressure ran...

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Published in:Physical chemistry chemical physics : PCCP 2021-10, Vol.23 (4), p.2314-2323
Main Authors: Wang, Yanan, Taguchi, Tomoya, Li, Huan, Suzuki, Ai, Zhang, Yanting, Miura, Akari, Ikeda, Mitsuki, Goto, Hidenori, Eguchi, Ritsuko, Miyazaki, Takafumi, Liao, Yen-Fa, Ishii, Hirofumi, Kubozono, Yoshihiro
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Summary:Herein, we report the preparation and characterization of BaBi 3 clarified by DC magnetic susceptibility, powder X-ray diffraction (XRD), and electrical transport. The superconducting properties of BaBi 3 were elucidated through the magnetic and electrical transport properties in a wide pressure range. The superconducting transition temperature, T c , showed a slight decrease (or almost constant T c ) against pressure up to 17.2 GPa. The values of the upper critical field, H c2 , at 0 K, were determined to be 1.27 T at 0 GPa and 3.11 T at 2.30 GPa, using the formula, because p -wave pairing appeared to occur for this material at both pressures, indicating the unconventionality of superconductivity. This result appears to be consistent with the topological non-trivial nature of superconductivity predicted theoretically. The pressure-dependent XRD patterns measured at 0-20.1 GPa indicated no structural phase transitions up to 20.1 GPa, i.e. , the structural phase transitions from the α phase to the β or γ phase which are induced by an application of pressure were not observed, contrary to the previous report, demonstrating that the α phase is maintained over the entire pressure range. Admittedly, the lattice constants and the volume of the unit cell, V , steadily decrease with increasing pressure up to 20.1 GPa. In this study, the plots of T c versus p and V versus p of BaBi 3 are depicted over a wide pressure range for the first time. The pressure dependence of BaBi 3 superconductivity is investigated, demonstrating only the presence of the α phase, and p -wave superconductivity.
ISSN:1463-9076
1463-9084
DOI:10.1039/d1cp00042j