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Evolution of superconductivity and charge order in pressurized RbV3Sb5
【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.
【Key words】 kagome superconductor; temperature–pressure phase diagram; superconducting dome; hydrostatic pressure;
- 【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