Superconducting behavior of BaTi2Bi2O and its pressure dependence
| Autor: | Huan Li, Hirofumi Ishii, Takafumi Miyazaki, Ai Suzuki, Tomoya Taguchi, Yanan Wang, Ritsuko Eguchi, Yoshihiro Kubozono, Akari Miura, Yen Fa Liao, Hidenori Goto |
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| Rok vydání: | 2020 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics General Physics and Astronomy 02 engineering and technology Le Bail method Crystal structure 021001 nanoscience & nanotechnology 01 natural sciences Magnetization Tetragonal crystal system Condensed Matter::Superconductivity Pairing 0103 physical sciences Physical and Theoretical Chemistry Cooper pair 010306 general physics 0210 nano-technology Ambient pressure |
| Zdroj: | Physical Chemistry Chemical Physics. 22:23315-23322 |
| ISSN: | 1463-9084 1463-9076 |
| Popis: | A new superconducting sample, BaTi2Bi2O, was synthesized and characterized over a wide pressure range. The superconducting transition temperature, Tc, of BaTi2Bi2O was 4.33 K at ambient pressure. The crystal structure was tetragonal (space group of P4/mmm (No. 123)), according to the X-ray diffraction (XRD) pattern at ambient pressure. The XRD pattern was analyzed using the Le Bail method. The magnetic-field dependence of the magnetization at different temperatures was precisely investigated to elucidate the characteristics of the superconductivity. The pressure-dependent XRD patterns showed absence of structural phase transitions up to 19.8 GPa. The superconducting properties of BaTi2Bi2O were investigated under pressure. Tc monotonously increased with the pressure (p) up to 4.0 GPa and saturated above 4.0 GPa. The variations in the Tc-p plot were thoroughly analyzed. The Cooper pair symmetry (or superconducting pairing mechanism) was analyzed based on the magnetic field dependence of the superconductivity at ambient and high pressures, which indicated a sign of p-wave pairing for the superconductivity of BaTi2Bi2O, i.e., topologically nontrivial sign was suggested for BaTi2Bi2O. |
| Databáze: | OpenAIRE |
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