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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 |
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Main Authors: | , , , , , , , , , , , , |
Format: | Article |
Language: | |
Online Access: | Get full text |
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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. |
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ISSN: | 1463-9076 1463-9084 |
DOI: | 10.1039/d1cp00042j |