Pressure tuning of localization and superconductivity in LaOPbBiS3 and La2O2Bi3AgS6
Y. Yuan, H. Arima, M. Masaoka, Y. Naito, Y. Hijikata, R. Jha, Y. Mizuguchi, K. Matsubayashi
DOI 10.1103/PhysRevB.105.064509 · Physical Review B
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Abstract
We report the effect of pressure on the electrical transport properties of the four-layer-type bismuth chalcogenide semiconductors LaOPbBiS3 and La2O2Bi3AgS6 and present the discovery of a pressure-induced superconductivity. In both compounds, the semiconductorlike behavior concomitant with an anomaly in the more insulating state is gradually suppressed with increasing pressure while the superconductivity develops. The obtained phase diagrams, in sharp contrast with the interplay between the conventional charge density waves and superconductivity, suggest that the enhancement of the superconductivity is due to the disorder near the localization threshold. These results indicate that pressure tuning of the local disorder in four-layer-type bismuth chalcogenides provides an attractive opportunity to study the interplay between disorder and superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2O2Bi3AgS6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.8 | 2.4 GPa | zero_resistance |
| La2O2Bi3AgS6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.8 | 2.4 GPa | onset |
| LaOPbBiS3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.6 | 2 GPa | zero_resistance |
| LaOPbBiS3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.6 | 2 GPa | onset |
| La2O2Bi3AgS6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.5 | Pressure unresolved | unknown |
| LaOPbBiS3-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.9 | Pressure unresolved | unknown |
| LaOPbBiS3-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.6 | 0.9 GPa | unknown |
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