{"title":"基于 Se 取代 BiS2 的超导体 LaO0.5F0.5Bi(S 1-xSex)2 的压力调谐","authors":"Naoki Kase, Katsuo Kondo, Shigefumi Watanabe, Nobuaki Miyakawa","doi":"10.1088/1361-6668/ad6e23","DOIUrl":null,"url":null,"abstract":"We report the effect of hydrostatic pressure on LaO<sub>0.5</sub>F<sub>0.5</sub>Bi(S<inline-formula>\n<tex-math><?CDATA $ _{1-x}$?></tex-math><mml:math overflow=\"scroll\"><mml:mrow><mml:mn>1</mml:mn><mml:msub><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:msub></mml:mrow></mml:math>\n<inline-graphic xlink:href=\"sustad6e23ieqn2.gif\"></inline-graphic></inline-formula>Se<sub><italic toggle=\"yes\">x</italic></sub>)<sub>2</sub> with chemical pressure applied to a conducting layer by means of electrical resistivity and ac-magnetic susceptibility measurements up to 2.5 GPa. We confirmed the bulk superconductive nature of the low superconducting (low-SC) and high superconducting (high-SC) phase using ac-magnetic susceptibility under hydrostatic pressure. The <inline-formula>\n<tex-math><?CDATA $T_\\mathrm{c}$?></tex-math><mml:math overflow=\"scroll\"><mml:mrow><mml:msub><mml:mi>T</mml:mi><mml:mrow><mml:mi mathvariant=\"normal\">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><inline-graphic xlink:href=\"sustad6e23ieqn3.gif\"></inline-graphic></inline-formula> of the high-SC phase was observed to decrease with an increase in the Se substitution. The critical pressure <inline-formula>\n<tex-math><?CDATA $P_\\mathrm{c}$?></tex-math><mml:math overflow=\"scroll\"><mml:mrow><mml:msub><mml:mi>P</mml:mi><mml:mrow><mml:mi mathvariant=\"normal\">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><inline-graphic xlink:href=\"sustad6e23ieqn4.gif\"></inline-graphic></inline-formula> shifted toward the higher <italic toggle=\"yes\">P</italic> and the <italic toggle=\"yes\">P</italic>-induced transition broadened with an increase in the Se content. The <inline-formula>\n<tex-math><?CDATA $T_\\mathrm{c}$?></tex-math><mml:math overflow=\"scroll\"><mml:mrow><mml:msub><mml:mi>T</mml:mi><mml:mrow><mml:mi mathvariant=\"normal\">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><inline-graphic xlink:href=\"sustad6e23ieqn5.gif\"></inline-graphic></inline-formula> of the low-SC phase can be expressed by assuming an applied hydrostatic pressure of 0.75 GPa as the Se substitution of <italic toggle=\"yes\">x</italic> = 0.1. The broad <inline-formula>\n<tex-math><?CDATA $P_\\mathrm{c}$?></tex-math><mml:math overflow=\"scroll\"><mml:mrow><mml:msub><mml:mi>P</mml:mi><mml:mrow><mml:mi mathvariant=\"normal\">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><inline-graphic xlink:href=\"sustad6e23ieqn6.gif\"></inline-graphic></inline-formula> transition is likely to be ascribed to the inhomogeneity of the Se substitution.","PeriodicalId":21985,"journal":{"name":"Superconductor Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pressure tuning of the Se-substituted BiS2-based superconductor LaO0.5F0.5Bi(S 1−xSex )2\",\"authors\":\"Naoki Kase, Katsuo Kondo, Shigefumi Watanabe, Nobuaki Miyakawa\",\"doi\":\"10.1088/1361-6668/ad6e23\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We report the effect of hydrostatic pressure on LaO<sub>0.5</sub>F<sub>0.5</sub>Bi(S<inline-formula>\\n<tex-math><?CDATA $ _{1-x}$?></tex-math><mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:mn>1</mml:mn><mml:msub><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:msub></mml:mrow></mml:math>\\n<inline-graphic xlink:href=\\\"sustad6e23ieqn2.gif\\\"></inline-graphic></inline-formula>Se<sub><italic toggle=\\\"yes\\\">x</italic></sub>)<sub>2</sub> with chemical pressure applied to a conducting layer by means of electrical resistivity and ac-magnetic susceptibility measurements up to 2.5 GPa. We confirmed the bulk superconductive nature of the low superconducting (low-SC) and high superconducting (high-SC) phase using ac-magnetic susceptibility under hydrostatic pressure. The <inline-formula>\\n<tex-math><?CDATA $T_\\\\mathrm{c}$?></tex-math><mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:msub><mml:mi>T</mml:mi><mml:mrow><mml:mi mathvariant=\\\"normal\\\">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><inline-graphic xlink:href=\\\"sustad6e23ieqn3.gif\\\"></inline-graphic></inline-formula> of the high-SC phase was observed to decrease with an increase in the Se substitution. The critical pressure <inline-formula>\\n<tex-math><?CDATA $P_\\\\mathrm{c}$?></tex-math><mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:msub><mml:mi>P</mml:mi><mml:mrow><mml:mi mathvariant=\\\"normal\\\">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><inline-graphic xlink:href=\\\"sustad6e23ieqn4.gif\\\"></inline-graphic></inline-formula> shifted toward the higher <italic toggle=\\\"yes\\\">P</italic> and the <italic toggle=\\\"yes\\\">P</italic>-induced transition broadened with an increase in the Se content. The <inline-formula>\\n<tex-math><?CDATA $T_\\\\mathrm{c}$?></tex-math><mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:msub><mml:mi>T</mml:mi><mml:mrow><mml:mi mathvariant=\\\"normal\\\">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><inline-graphic xlink:href=\\\"sustad6e23ieqn5.gif\\\"></inline-graphic></inline-formula> of the low-SC phase can be expressed by assuming an applied hydrostatic pressure of 0.75 GPa as the Se substitution of <italic toggle=\\\"yes\\\">x</italic> = 0.1. The broad <inline-formula>\\n<tex-math><?CDATA $P_\\\\mathrm{c}$?></tex-math><mml:math overflow=\\\"scroll\\\"><mml:mrow><mml:msub><mml:mi>P</mml:mi><mml:mrow><mml:mi mathvariant=\\\"normal\\\">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><inline-graphic xlink:href=\\\"sustad6e23ieqn6.gif\\\"></inline-graphic></inline-formula> transition is likely to be ascribed to the inhomogeneity of the Se substitution.\",\"PeriodicalId\":21985,\"journal\":{\"name\":\"Superconductor Science and Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-08-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Superconductor Science and Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1088/1361-6668/ad6e23\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Superconductor Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1361-6668/ad6e23","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
我们报告了静水压力对 LaO0.5F0.5Bi(S1-xSex)2 的影响，通过电阻率和高达 2.5 GPa 的交流磁感应强度测量，对导电层施加化学压力。我们利用静水压力下的交流磁感应强度，证实了低超导（low-SC）和高超导（high-SC）相的体超导性质。观察到高超导相的 Tc 随 Se 取代量的增加而降低。临界压力 Pc 随 Se 含量的增加而向更高的 P 方向移动，P 诱导的转变也随之扩大。低碳酸钙相的 Tc 可以通过假设施加 0.75 GPa 的静水压力来表示，即 Se 的替代值为 x = 0.1。宽 Pc 过渡可能是由于硒替代的不均匀性造成的。
Pressure tuning of the Se-substituted BiS2-based superconductor LaO0.5F0.5Bi(S 1−xSex )2
We report the effect of hydrostatic pressure on LaO0.5F0.5Bi(S1−xSex)2 with chemical pressure applied to a conducting layer by means of electrical resistivity and ac-magnetic susceptibility measurements up to 2.5 GPa. We confirmed the bulk superconductive nature of the low superconducting (low-SC) and high superconducting (high-SC) phase using ac-magnetic susceptibility under hydrostatic pressure. The Tc of the high-SC phase was observed to decrease with an increase in the Se substitution. The critical pressure Pc shifted toward the higher P and the P-induced transition broadened with an increase in the Se content. The Tc of the low-SC phase can be expressed by assuming an applied hydrostatic pressure of 0.75 GPa as the Se substitution of x = 0.1. The broad Pc transition is likely to be ascribed to the inhomogeneity of the Se substitution.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
