Evolution of superconductivity and charge order in pressurized RbV3Sb5 |
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| Authors: | Feng Du Shuaishuai Luo Rui Li Brenden ROrtiz Ye Chen Stephen DWilson Yu Song Huiqiu Yuan |
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| Affiliation: | 1.Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou 310058, China;2.Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou 310058, China;3.Materials Department and California Nanosystems Institute, University of California Santa Barbara, Santa Barbara, CA 93106, United States;4.State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310058, China |
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| Abstract: | The kagome metals AV3Sb5 (A= K, Rb, Cs) under ambient pressure exhibit an unusual charge order, from which superconductivity emerges. In this work, by applying hydrostatic pressure using a liquid pressure medium and carrying out electrical resistance measurements for RbV3Sb5, we find that the charge order becomes suppressed under a modest pressure pc (1.4 GPa<pc<1.6 GPa), while the superconducting transition temperature Tc is maximized. Tc is then gradually weakened with further increase of pressure and reaches a minimum around 14.3 GPa, before exhibiting another {maximum} around 22.8 GPa, signifying the presence of a second superconducting dome. Distinct normal state resistance anomalies are found to be associated with the second superconducting dome, similar to KV3Sb5. Our findings point to qualitatively similar temperature-pressure phase diagrams in KV3Sb5 and RbV3Sb5, {and suggest a close link} between the second superconducting dome and the high-pressure resistance anomalies. |
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| Keywords: | kagome superconductor temperature-pressure phase diagram superconducting dome hydrostatic pressure |
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