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Evolution of superconductivity and charge order in pressurized RbV3Sb5

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【作者】 杜锋罗帅帅李蕊Brenden R.Ortiz陈晔Stephen D.Wilson宋宇袁辉球

【Author】 Feng Du;Shuaishuai Luo;Rui Li;Brenden R.Ortiz;Ye Chen;Stephen D.Wilson;Yu Song;Huiqiu Yuan;Center for Correlated Matter and Department of Physics, Zhejiang University;Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University;Materials Department and California Nanosystems Institute, University of California Santa Barbara;State Key Laboratory of Silicon Materials, Zhejiang University;

【通讯作者】 宋宇;袁辉球;

【机构】 Center for Correlated Matter and Department of Physics, Zhejiang UniversityZhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang UniversityMaterials Department and California Nanosystems Institute, University of California Santa BarbaraState Key Laboratory of Silicon Materials, Zhejiang University

【摘要】 The kagome metals AV3 Sb5(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 RbV3 Sb5,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 KV3 Sb5.Our findings point to qualitatively similar temperature-pressure phase diagrams in KV3 Sb5 and RbV3 Sb5,and suggest a close link between the second superconducting dome and the high-pressure resistance anomalies.

【Abstract】 The kagome metals AV3 Sb5(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 RbV3 Sb5,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 KV3 Sb5.Our findings point to qualitatively similar temperature-pressure phase diagrams in KV3 Sb5 and RbV3 Sb5,and suggest a close link between the second superconducting dome and the high-pressure resistance anomalies.

【基金】 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);the Fundamental Research Funds for the Central Universities of China;support via the UC Santa Barbara NSF Quantum Foundry funded via the Q-AMASE-i program under award DMR-1906325;support from the California Nano Systems Institute through the Elings fellowship program
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2022年01期
  • 【分类号】O469
  • 【下载频次】10
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