Effect of physical and chemical pressure on the superconductivity of cage-type compound Lu5Rh6Sn18
Chao Xiong, Cuiying Pei, Qi Wang, Juefei Wu, Yi Zhao, Yuyang Jiang, Changhua Li, Weizheng Cao, Na Yu, Lili Zhang, Yanpeng Qi
DOI 10.1103/PhysRevB.109.075202 · Physical Review B
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Abstract
Lu5Rh6Sn18 is one of the cage-type superconductors with superconducting transition temperature Tc=4.12 K. Here we investigate the effect of pressure on the superconductivity in Lu5Rh6Sn18 by combining high-pressure electrical transport, synchrotron x-ray diffraction (XRD), and chemical doping. Application of high pressure can enhance both the metallicity and the superconducting transition temperature in Lu5Rh6Sn18. Tc is found to show a continuous increase reaching up to 5.50 K at 11.4 GPa. Our high-pressure synchrotron XRD measurements demonstrate the stability of the pristine crystal structure up to 12.0 GPa. In contrast, Tc is suppressed after the substitution of La ions in Lu sites, inducing negative chemical pressure. Our study provides valuable insights into the improvement of superconductivity in caged compounds.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Lu5Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.12 | Pressure unresolved | onset |
| Lu5Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.9 | Pressure unresolved | zero_resistance |
| Lu5Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.05 | Pressure unresolved | onset |
| Lu5Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | 11.4 GPa | onset |
| LaLu4Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.72 | Pressure unresolved | onset |
| LaLu4Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.33 | Pressure unresolved | zero_resistance |
| LaLu4Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.58 | Pressure unresolved | onset |
| Sc5Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.4 | Pressure not reported | unknown |
| Y5Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | unknown |
| Tm5Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.2 | Pressure not reported | unknown |
| Er5Rh6Sn18 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.05 | Pressure not reported | unknown |
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