| Evidence for a nodal energy gap in the iron-pnictide superconductor LaFePO from penetration depth measurements by scanning SQUID susceptometry. | |
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MedLine Citation:
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PMID: 19792454 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We measure changes in the penetration depth lambda of the T_{c} approximately 6 K superconductor LaFePO. In the process, scanning SQUID susceptometry is demonstrated as a technique for accurately measuring local temperature-dependent changes in lambda, ideal for studying early or difficult-to-grow materials. lambda is found to vary linearly with temperatures from 0.36 to approximately 2 K, with a slope of 143 +/- 15 A/K, suggesting line nodes in the superconducting order parameter. The linear dependence up to approximately T_{c}/3, similar to the cuprate superconductors, indicates well-developed nodes. |
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Authors:
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Clifford W Hicks; Thomas M Lippman; Martin E Huber; James G Analytis; Jiun-Haw Chu; Ann S Erickson; Ian R Fisher; Kathryn A Moler |
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Publication Detail:
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Type: Journal Article Date: 2009-09-18 |
Journal Detail:
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Title: Physical review letters Volume: 103 ISSN: 0031-9007 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2009 Sep |
Date Detail:
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Created Date: 2009-10-01 Completed Date: 2009-11-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 127003 Citation Subset: - |
Affiliation:
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Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California, 94305, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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