Doping Evolution of the Superconducting Gap Structure in Heavily Hole-Doped Ba1-xKxFe2As2： a Heat Transport Study
We perform systematic thermal conductivity measurements on heavily hole-doped Ba1-xKxFe2As2 single crystals with 0.747 ≤ x ≤ 0.974. At x=0.747, the K0/T is negligible, indicating a nodeless superconducting gap. A small residual linear term K0/T （=0.035 m W.K-2 cm-1） appears at xz0.826, and it increa...
Gespeichert in:
| Veröffentlicht in: | 中国物理快报：英文版 2015-12 (12), p.131-134 |
|---|---|
| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 134 |
|---|---|
| container_issue | 12 |
| container_start_page | 131 |
| container_title | 中国物理快报：英文版 |
| container_volume | |
| creator | 洪晓晨 王爱峰 张震 潘坚 何兰坡 罗习刚 陈仙辉 李世燕 |
| description | We perform systematic thermal conductivity measurements on heavily hole-doped Ba1-xKxFe2As2 single crystals with 0.747 ≤ x ≤ 0.974. At x=0.747, the K0/T is negligible, indicating a nodeless superconducting gap. A small residual linear term K0/T （=0.035 m W.K-2 cm-1） appears at xz0.826, and it increases slowly up to x=0.974, followed by a substantial increase of more than 20 times to of K0/T clearly shows that the nodal gap appears near x surface topology. The small values of K0/T from x=0.826 the pure KFe2As2 （x=1.0）. This doping dependence = 0.8, possibly associated with the change of Fermi to 0.974 are consistent with the Y-shaped nodal s- wave gap recently revealed by angle-resolved photoemission spectroscopy experiments at x=0.9. Furthermore, the substantial increase of K0/T from x=0.974 to 1.0 is inconsistent with a symmetry-imposed d-wave gap in KFe2 As2, and a possible nodal gap structure in KFe2As2 is discussed. |
| doi_str_mv | 10.1088/0256-307X/32/12/127403 |
| format | Article |
| fullrecord | <record><control><sourceid>chongqing</sourceid><recordid>TN_cdi_chongqing_primary_667858578</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><cqvip_id>667858578</cqvip_id><sourcerecordid>667858578</sourcerecordid><originalsourceid>FETCH-LOGICAL-c182t-a8d84470e85a6f2067855e146480c7a62970e39b1b129dd18aa19bfcc19b11893</originalsourceid><addsrcrecordid>eNo9j99KwzAUh4MoOKevIMH7uJwkbdLLOfdHFLzYBO9GlqZbpTY1Tcf2Kj6L7-QrmKIIh3P4cT4--CF0DfQWqFIjypKUcCpfR5yNoB8pKD9BA5ACCE8EPUWDf-gcXbTtG6UACmCA2nvXlPUWT_eu6kLpauwKHHYWL7vGeuPqvDOhB-a6wcvgY-q8xWWNF1bvy-qIF66yJFpsju80kMPjYWbZuGXfX59Y91TAK6_rtnE-REOXHy_RWaGr1l793SF6mU1XkwV5ep4_TMZPxIBigWiVKyEktSrRacFoKlWSWBCpUNRInbIs_ni2gQ2wLM9BaQ3ZpjAm7tgu40N08-s1O1dvP2KLdePLd-2P67SXqUQq_gMsSF35</addsrcrecordid><sourcetype>Publisher</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Doping Evolution of the Superconducting Gap Structure in Heavily Hole-Doped Ba1-xKxFe2As2： a Heat Transport Study</title><source>IOP Publishing Journals</source><source>Institute of Physics (IOP) Journals - HEAL-Link</source><source>Alma/SFX Local Collection</source><creator>洪晓晨 王爱峰 张震 潘坚 何兰坡 罗习刚 陈仙辉 李世燕</creator><creatorcontrib>洪晓晨 王爱峰 张震 潘坚 何兰坡 罗习刚 陈仙辉 李世燕</creatorcontrib><description>We perform systematic thermal conductivity measurements on heavily hole-doped Ba1-xKxFe2As2 single crystals with 0.747 ≤ x ≤ 0.974. At x=0.747, the K0/T is negligible, indicating a nodeless superconducting gap. A small residual linear term K0/T （=0.035 m W.K-2 cm-1） appears at xz0.826, and it increases slowly up to x=0.974, followed by a substantial increase of more than 20 times to of K0/T clearly shows that the nodal gap appears near x surface topology. The small values of K0/T from x=0.826 the pure KFe2As2 （x=1.0）. This doping dependence = 0.8, possibly associated with the change of Fermi to 0.974 are consistent with the Y-shaped nodal s- wave gap recently revealed by angle-resolved photoemission spectroscopy experiments at x=0.9. Furthermore, the substantial increase of K0/T from x=0.974 to 1.0 is inconsistent with a symmetry-imposed d-wave gap in KFe2 As2, and a possible nodal gap structure in KFe2As2 is discussed.</description><identifier>ISSN: 0256-307X</identifier><identifier>EISSN: 1741-3540</identifier><identifier>DOI: 10.1088/0256-307X/32/12/127403</identifier><language>eng</language><subject>传热 ; 拓扑结构 ; 掺杂 ; 演变 ; 空穴 ; 能隙结构 ; 角分辨光电子能谱 ; 超导能隙</subject><ispartof>中国物理快报：英文版, 2015-12 (12), p.131-134</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/84212X/84212X.jpg</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>洪晓晨 王爱峰 张震 潘坚 何兰坡 罗习刚 陈仙辉 李世燕</creatorcontrib><title>Doping Evolution of the Superconducting Gap Structure in Heavily Hole-Doped Ba1-xKxFe2As2： a Heat Transport Study</title><title>中国物理快报：英文版</title><addtitle>Chinese Physics Letters</addtitle><description>We perform systematic thermal conductivity measurements on heavily hole-doped Ba1-xKxFe2As2 single crystals with 0.747 ≤ x ≤ 0.974. At x=0.747, the K0/T is negligible, indicating a nodeless superconducting gap. A small residual linear term K0/T （=0.035 m W.K-2 cm-1） appears at xz0.826, and it increases slowly up to x=0.974, followed by a substantial increase of more than 20 times to of K0/T clearly shows that the nodal gap appears near x surface topology. The small values of K0/T from x=0.826 the pure KFe2As2 （x=1.0）. This doping dependence = 0.8, possibly associated with the change of Fermi to 0.974 are consistent with the Y-shaped nodal s- wave gap recently revealed by angle-resolved photoemission spectroscopy experiments at x=0.9. Furthermore, the substantial increase of K0/T from x=0.974 to 1.0 is inconsistent with a symmetry-imposed d-wave gap in KFe2 As2, and a possible nodal gap structure in KFe2As2 is discussed.</description><subject>传热</subject><subject>拓扑结构</subject><subject>掺杂</subject><subject>演变</subject><subject>空穴</subject><subject>能隙结构</subject><subject>角分辨光电子能谱</subject><subject>超导能隙</subject><issn>0256-307X</issn><issn>1741-3540</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNo9j99KwzAUh4MoOKevIMH7uJwkbdLLOfdHFLzYBO9GlqZbpTY1Tcf2Kj6L7-QrmKIIh3P4cT4--CF0DfQWqFIjypKUcCpfR5yNoB8pKD9BA5ACCE8EPUWDf-gcXbTtG6UACmCA2nvXlPUWT_eu6kLpauwKHHYWL7vGeuPqvDOhB-a6wcvgY-q8xWWNF1bvy-qIF66yJFpsju80kMPjYWbZuGXfX59Y91TAK6_rtnE-REOXHy_RWaGr1l793SF6mU1XkwV5ep4_TMZPxIBigWiVKyEktSrRacFoKlWSWBCpUNRInbIs_ni2gQ2wLM9BaQ3ZpjAm7tgu40N08-s1O1dvP2KLdePLd-2P67SXqUQq_gMsSF35</recordid><startdate>20151201</startdate><enddate>20151201</enddate><creator>洪晓晨 王爱峰 张震 潘坚 何兰坡 罗习刚 陈仙辉 李世燕</creator><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>~WA</scope></search><sort><creationdate>20151201</creationdate><title>Doping Evolution of the Superconducting Gap Structure in Heavily Hole-Doped Ba1-xKxFe2As2： a Heat Transport Study</title><author>洪晓晨 王爱峰 张震 潘坚 何兰坡 罗习刚 陈仙辉 李世燕</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c182t-a8d84470e85a6f2067855e146480c7a62970e39b1b129dd18aa19bfcc19b11893</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>传热</topic><topic>拓扑结构</topic><topic>掺杂</topic><topic>演变</topic><topic>空穴</topic><topic>能隙结构</topic><topic>角分辨光电子能谱</topic><topic>超导能隙</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>洪晓晨 王爱峰 张震 潘坚 何兰坡 罗习刚 陈仙辉 李世燕</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库- 镜像站点</collection><jtitle>中国物理快报：英文版</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>洪晓晨 王爱峰 张震 潘坚 何兰坡 罗习刚 陈仙辉 李世燕</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Doping Evolution of the Superconducting Gap Structure in Heavily Hole-Doped Ba1-xKxFe2As2： a Heat Transport Study</atitle><jtitle>中国物理快报：英文版</jtitle><addtitle>Chinese Physics Letters</addtitle><date>2015-12-01</date><risdate>2015</risdate><issue>12</issue><spage>131</spage><epage>134</epage><pages>131-134</pages><issn>0256-307X</issn><eissn>1741-3540</eissn><abstract>We perform systematic thermal conductivity measurements on heavily hole-doped Ba1-xKxFe2As2 single crystals with 0.747 ≤ x ≤ 0.974. At x=0.747, the K0/T is negligible, indicating a nodeless superconducting gap. A small residual linear term K0/T （=0.035 m W.K-2 cm-1） appears at xz0.826, and it increases slowly up to x=0.974, followed by a substantial increase of more than 20 times to of K0/T clearly shows that the nodal gap appears near x surface topology. The small values of K0/T from x=0.826 the pure KFe2As2 （x=1.0）. This doping dependence = 0.8, possibly associated with the change of Fermi to 0.974 are consistent with the Y-shaped nodal s- wave gap recently revealed by angle-resolved photoemission spectroscopy experiments at x=0.9. Furthermore, the substantial increase of K0/T from x=0.974 to 1.0 is inconsistent with a symmetry-imposed d-wave gap in KFe2 As2, and a possible nodal gap structure in KFe2As2 is discussed.</abstract><doi>10.1088/0256-307X/32/12/127403</doi><tpages>4</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0256-307X |
| ispartof | 中国物理快报：英文版, 2015-12 (12), p.131-134 |
| issn | 0256-307X 1741-3540 |
| language | eng |
| recordid | cdi_chongqing_primary_667858578 |
| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link; Alma/SFX Local Collection |
| subjects | 传热 拓扑结构 掺杂 演变 空穴 能隙结构 角分辨光电子能谱 超导能隙 |
| title | Doping Evolution of the Superconducting Gap Structure in Heavily Hole-Doped Ba1-xKxFe2As2： a Heat Transport Study |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-21T02%3A49%3A27IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-chongqing&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Doping%20Evolution%20of%20the%20Superconducting%20Gap%20Structure%20in%20Heavily%20Hole-Doped%20Ba1-xKxFe2As2%EF%BC%9A%20a%20Heat%20Transport%20Study&rft.jtitle=%E4%B8%AD%E5%9B%BD%E7%89%A9%E7%90%86%E5%BF%AB%E6%8A%A5%EF%BC%9A%E8%8B%B1%E6%96%87%E7%89%88&rft.au=%E6%B4%AA%E6%99%93%E6%99%A8%20%E7%8E%8B%E7%88%B1%E5%B3%B0%20%E5%BC%A0%E9%9C%87%20%E6%BD%98%E5%9D%9A%20%E4%BD%95%E5%85%B0%E5%9D%A1%20%E7%BD%97%E4%B9%A0%E5%88%9A%20%E9%99%88%E4%BB%99%E8%BE%89%20%E6%9D%8E%E4%B8%96%E7%87%95&rft.date=2015-12-01&rft.issue=12&rft.spage=131&rft.epage=134&rft.pages=131-134&rft.issn=0256-307X&rft.eissn=1741-3540&rft_id=info:doi/10.1088/0256-307X/32/12/127403&rft_dat=%3Cchongqing%3E667858578%3C/chongqing%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rft_cqvip_id=667858578&rfr_iscdi=true |