Evolution of superconductivity and charge order in pressurized RbV3Sb5

doi:10.1088/1674-1056/ac4232

中国物理B ›› 2022, Vol. 31 ›› Issue (1): 17404-017404.doi: 10.1088/1674-1056/ac4232

所属专题： SPECIAL TOPIC — Superconductivity in vanadium-based kagome materials

Evolution of superconductivity and charge order in pressurized RbV₃Sb₅

Feng Du(杜锋)^1,2, Shuaishuai Luo(罗帅帅)^1,2, Rui Li(李蕊)^1,2, Brenden R. Ortiz³, Ye Chen(陈晔)^1,2, Stephen D. Wilson³, Yu Song(宋宇)^1,2,†, and Huiqiu Yuan(袁辉球)^1,2,4,‡

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

收稿日期:2021-08-21 修回日期:2021-11-29 接受日期:2021-12-11 出版日期:2021-12-03 发布日期:2021-12-28
通讯作者: Yu Song, Huiqiu Yuan E-mail:yusong_phys@zju.edu.cn;hqyuan@zju.edu.cn
基金资助:
This work was supported by the National Key R&D Program of China (Grant Nos. 2017YFA0303100 and 2016YFA0300202), the Key R&D Program of Zhejiang Province, China (Grant No. 2021C01002), the National Natural Science Foundation of China (Grant Nos. 11974306 and 12034017), and the Fundamental Research Funds for the Central Universities of China. S.D.W. and B.R.O. gratefully acknowledge support via the UC Santa Barbara NSF Quantum Foundry funded via the Q-AMASE-i program under award DMR-1906325. B.R.O. also acknowledges support from the California NanoSystems Institute through the Elings fellowship program.

Evolution of superconductivity and charge order in pressurized RbV₃Sb₅

Feng Du(杜锋)^1,2, Shuaishuai Luo(罗帅帅)^1,2, Rui Li(李蕊)^1,2, Brenden R. Ortiz³, Ye Chen(陈晔)^1,2, Stephen D. Wilson³, Yu Song(宋宇)^1,2,†, and Huiqiu Yuan(袁辉球)^1,2,4,‡

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

Received:2021-08-21 Revised:2021-11-29 Accepted:2021-12-11 Online:2021-12-03 Published:2021-12-28
Contact: Yu Song, Huiqiu Yuan E-mail:yusong_phys@zju.edu.cn;hqyuan@zju.edu.cn
Supported by:
This work was supported by the National Key R&D Program of China (Grant Nos. 2017YFA0303100 and 2016YFA0300202), the Key R&D Program of Zhejiang Province, China (Grant No. 2021C01002), the National Natural Science Foundation of China (Grant Nos. 11974306 and 12034017), and the Fundamental Research Funds for the Central Universities of China. S.D.W. and B.R.O. gratefully acknowledge support via the UC Santa Barbara NSF Quantum Foundry funded via the Q-AMASE-i program under award DMR-1906325. B.R.O. also acknowledges support from the California NanoSystems Institute through the Elings fellowship program.

摘要/Abstract

摘要： 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 p_c (1.4 GPa<p_c<1.6 GPa), while the superconducting transition temperature T_c is maximized. T_c 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.

关键词: kagome superconductor, temperature-pressure phase diagram, superconducting dome, hydrostatic pressure

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 p_c (1.4 GPa<p_c<1.6 GPa), while the superconducting transition temperature T_c is maximized. T_c 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.

Key words: kagome superconductor, temperature-pressure phase diagram, superconducting dome, hydrostatic pressure

中图分类号: (Superconductivity phase diagrams)

74.25.Dw

74.62.Fj (Effects of pressure) 74.25.F- (Transport properties)

Feng Du(杜锋), Shuaishuai Luo(罗帅帅), Rui Li(李蕊), Brenden R. Ortiz, Ye Chen(陈晔), Stephen D. Wilson, Yu Song(宋宇), and Huiqiu Yuan(袁辉球). Evolution of superconductivity and charge order in pressurized RbV₃Sb₅[J]. 中国物理B, 2022, 31(1): 17404-017404.

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Evolution of superconductivity and charge order in pressurized RbV₃Sb₅

Evolution of superconductivity and charge order in pressurized RbV₃Sb₅

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