Evolution of superconductivity and charge order in pressurized RbV_(3)Sb_(5)  

作　　者：Feng Du Shuaishuai Luo Rui Li Brenden R.Ortiz Ye Chen Stephen D.Wilson Yu Song Huiqiu Yuan 杜锋;罗帅帅;李蕊;Brenden R.Ortiz;陈晔;Stephen D.Wilson;宋宇;袁辉球(Center for Correlated Matter and Department of Physics,Zhejiang University,Hangzhou 310058,China;Zhejiang Province Key Laboratory of Quantum Technology and Device,Department of Physics,Zhejiang University,Hangzhou 310058,China;Materials Department and California Nanosystems Institute,University of California Santa Barbara,Santa Barbara,CA 93106,United States;State Key Laboratory of Silicon Materials,Zhejiang University,Hangzhou 310058,China)

机构地区：[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

出　　处：《Chinese Physics B》2022年第1期24-30,共7页中国物理B（英文版）

基　　金：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。

摘　　要：The kagome metals AV_(3)Sb_(5)(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 RbV_(3)Sb_(5),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 KV_(3)Sb_(5).Our findings point to qualitatively similar temperature-pressure phase diagrams in KV_(3)Sb_(5) and RbV_(3)Sb_(5),{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 

分 类 号：O469[理学—凝聚态物理]