Superconductivity and fluctuating magnetism in quasi-two-dimensional kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br probed with implanted muons
A muon-spin relaxation (μ+SR) investigation is presented for the molecular superconductor κ-(BEDT-TTF) 2Cu[N(CN) 2]Br. Evidence is found for low-temperature phase separation throughout the bulk of the material, with only a fraction of the sample showin...
| Glavni autori: | , , , |
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| Format: | Journal article |
| Jezik: | English |
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2011
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| _version_ | 1826288400110452736 |
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| author | Lancaster, T Blundell, S Pratt, F Schlueter, J |
| author_facet | Lancaster, T Blundell, S Pratt, F Schlueter, J |
| author_sort | Lancaster, T |
| collection | OXFORD |
| description | A muon-spin relaxation (μ+SR) investigation is presented for the molecular superconductor κ-(BEDT-TTF) 2Cu[N(CN) 2]Br. Evidence is found for low-temperature phase separation throughout the bulk of the material, with only a fraction of the sample showing a superconducting signal, even for slow cooling. Rapid cooling reduces the superconducting fraction still further. For the superconducting phase, the in-plane penetration depth is measured to be λ ||=0.47(1)μm, and evidence is seen for a vortex decoupling transition in applied fields above 40 mT. The magnetic fluctuations in the normal state produce a precipitous drop in relaxation rate above 100 K, and we discuss the possible causes for the unusual relaxation that we observe for T>T c. © 2011 American Physical Society. |
| first_indexed | 2024-03-07T02:13:07Z |
| format | Journal article |
| id | oxford-uuid:a152e9e8-6355-438f-aa3c-dea100edf99d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:13:07Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:a152e9e8-6355-438f-aa3c-dea100edf99d2022-03-27T02:12:20ZSuperconductivity and fluctuating magnetism in quasi-two-dimensional kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br probed with implanted muonsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a152e9e8-6355-438f-aa3c-dea100edf99dEnglishSymplectic Elements at Oxford2011Lancaster, TBlundell, SPratt, FSchlueter, JA muon-spin relaxation (μ+SR) investigation is presented for the molecular superconductor κ-(BEDT-TTF) 2Cu[N(CN) 2]Br. Evidence is found for low-temperature phase separation throughout the bulk of the material, with only a fraction of the sample showing a superconducting signal, even for slow cooling. Rapid cooling reduces the superconducting fraction still further. For the superconducting phase, the in-plane penetration depth is measured to be λ ||=0.47(1)μm, and evidence is seen for a vortex decoupling transition in applied fields above 40 mT. The magnetic fluctuations in the normal state produce a precipitous drop in relaxation rate above 100 K, and we discuss the possible causes for the unusual relaxation that we observe for T>T c. © 2011 American Physical Society. |
| spellingShingle | Lancaster, T Blundell, S Pratt, F Schlueter, J Superconductivity and fluctuating magnetism in quasi-two-dimensional kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br probed with implanted muons |
| title | Superconductivity and fluctuating magnetism in quasi-two-dimensional kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br probed with implanted muons |
| title_full | Superconductivity and fluctuating magnetism in quasi-two-dimensional kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br probed with implanted muons |
| title_fullStr | Superconductivity and fluctuating magnetism in quasi-two-dimensional kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br probed with implanted muons |
| title_full_unstemmed | Superconductivity and fluctuating magnetism in quasi-two-dimensional kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br probed with implanted muons |
| title_short | Superconductivity and fluctuating magnetism in quasi-two-dimensional kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br probed with implanted muons |
| title_sort | superconductivity and fluctuating magnetism in quasi two dimensional kappa bedt ttf 2 cu n cn 2 br probed with implanted muons |
| work_keys_str_mv | AT lancastert superconductivityandfluctuatingmagnetisminquasitwodimensionalkappabedtttf2cuncn2brprobedwithimplantedmuons AT blundells superconductivityandfluctuatingmagnetisminquasitwodimensionalkappabedtttf2cuncn2brprobedwithimplantedmuons AT prattf superconductivityandfluctuatingmagnetisminquasitwodimensionalkappabedtttf2cuncn2brprobedwithimplantedmuons AT schlueterj superconductivityandfluctuatingmagnetisminquasitwodimensionalkappabedtttf2cuncn2brprobedwithimplantedmuons |