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Persistence to high temperatures of interlayer coherence in an organic superconductor

Autor: Singleton, John, Goddard, PA, Ardavan, A, Coldea, AI, Blundell, SJ, McDonald, RD, Tozer, S, Schlueter, JA

The interlayer magnetoresistance $\rho_{zz}$ of the organic metal \cuscn is studied in fields of up to 45 T and at temperatures $T$ from 0.5 K to 30 K. The peak in $\rho_{zz}$ seen in in-plane fields, a definitive signature of interlayer coherence, r

Externí odkaz: http://arxiv.org/abs/cond-mat/0610318

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Competing pairing interactions responsible for the large upper critical field in a stoichiometric iron-based superconductor, CaKFe$_4$As$_4$

Autor: Bristow, M, Knafo, W, Reiss, P, Meier, W, Canfield, PC, Blundell, SJ, Coldea, AI

The upper critical field of multiband superconductors is an important quantity that can reveal the details about the nature of the superconducting pairing. Here we experimentally map out the complete upper critical field phase diagram of a stoichiome

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::666fd1a72d53f3fc0b78ddb32a990cda
http://arxiv.org/abs/2003.02888

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Evolution of the low-temperature Fermi surface of superconducting FeSe1−xSx across a nematic phase transition

Autor: Coldea, AI, Blake, SF, Kasahara, S, Haghighirad, AA, Watson, MD, Knafo, W, Choi, ES, McCollam, A, Reiss, P, Yamashita, T, Bruma, M, Speller, SC, Matsuda, Y, Wolf, T, Shibauchi, T, Schofield, AJ

Publikováno v: Npj Quantum Materials
Npj Quantum Materials, Nature publishing, 2019, 4 (1), ⟨10.1038/s41535-018-0141-0⟩
Npj Quantum Materials, 4, 1, pp. 2
Npj Quantum Materials, 4, 2

This work was mainly supported by EPSRC (EP/L001772/1, EP/I004475/1, EP/I017836/1). A.A.H. acknowledges the financial support of the Oxford Quantum Materials Platform Grant (EP/M020517/1). A portion of this work was performed at the National High Mag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::be2d8e77e7b729a0373454c586e97f7b
https://hal.archives-ouvertes.fr/hal-02404731

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Robust superconducting state in the low-quasiparticle-density organic metals beta(')-(BEDT-TTF)(4)[(H3O)M(C2O4)(3)]center dot Y: Superconductivity due to proximity to a charge-ordered state

Autor: Bangura, AF, Coldea, AI, Singleton, J, Ardavan, A, Akutsu-Sato, A, Akutsu, H, Turner, SS, Day, P, Yamamoto, T, Yakushi, K

We report magnetotransport measurements on the quasi-two-dimensional charge-transfer salts β″-(BEDT-TTF)4[(H3O)M(C2O4)3]Y, with Y=C6H5NO2 and C6H5CN using magnetic fields of up to 45 T and temperatures down to 0.5 K. A surprisingly robust supercon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::100bf1ef9d67b727a71050c20f2b2e36
https://doi.org/10.1103/physrevb.72.014543

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Evolution of the magnetic and magnetotransport properties of the Ga-substituted manganite compounds La2-xSrxMnGaO6

Autor: Coldea, AI, Blundell, SJ, Marshall, IM, Steer, CA, Singleton, J, Pratt, FL, Noailles, LD, Rosseinsky, MJ, Spring, LE, Battle, PD

We report a series of magnetic and magnetotransport studies performed on Ga-substituted manganite compounds La2-xSrxMnGaO6 (x≤0.7). We replace half of the Mn ions in LaMnO3 with diamagnetic ions Ga3+ and find that the system transforms into a ferro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::7e1507d5b9d3f5272c7c655cd8859ff8
https://doi.org/10.1103/physrevb.65.054402

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Nesting of electron and hole Fermi surfaces in nonsuperconducting BaFe 2P2

Autor: Arnold, BJ, Kasahara, S, Coldea, AI, Terashima, T, Matsuda, Y, Shibauchi, T, Carrington, A

We report detailed measurements of the de Haas-van Alphen (dHvA) effect in BaFe2P2, which is the end member of the superconducting series, BaFe2(As1-xPx)2. Using high-purity samples, we are able to observe dHvA oscillations from all the sheets of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::34a6e71a325e7a1b7a57c45ff7c813c2
https://ora.ox.ac.uk/objects/uuid:5ba43c71-690f-46b5-9643-065b32eacb7b

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Topological change of the Fermi surface in ternary iron pnictides with reduced c/a ratio: a de Haas-van Alphen study of CaFe2P2

Autor: Coldea, AI, Andrew, CM, Analytis, JG, McDonald, RD, Bangura, AF, Chu, JH, Fisher, IR, Carrington, A

We report a de Haas-van Alphen effect study of the Fermi surface of CaFe2P2 using low-temperature torque magnetometry up to 45 T. This system is a close structural analog of the collapsed tetragonal nonmagnetic phase of CaFe2As2. We find the Fermi su

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::4527f72b644e3a8a6872630965b93150
https://doi.org/10.1103/physrevlett.103.026404

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Reply to Comment by Borisenko et al. on article 'A de Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs'

Autor: Putzke, C, Coldea, AI, Guillamon, I, Vignolles, D, McCollam, A, LeBoeuf, D, Watson, MD, Mazin, II, Kasahara, S, Terashima, T, Shibauchi, T, Matsuda, Y, Carrington, A

Recently, Borisenko et al have posted a Comment (arXiv:1108.1159) where they suggest an alternative interpretation of our de Haas-van Alphen (dHvA) measurements on the superconductor LiFeAs. In our original paper (arXiv:1107.4375) we concluded that o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f182a422f4176fdda6edbc252b4511ee
http://arxiv.org/abs/1108.3956

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