De Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs

C. Putzke; A. I. Coldea; I. Guillamón; D. Vignolles; A. McCollam; D. Leboeuf; M. D. Watson; I. I. Mazin; S. Kasahara; T. Terashima; T. Shibauchi; Y. Matsuda; A. Carrington

doi:10.1103/PhysRevLett.108.047002

De Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs

C. Putzke, A. I. Coldea, I. Guillamón, D. Vignolles, A. McCollam, D. Leboeuf, M. D. Watson, I. I. Mazin, S. Kasahara, T. Terashima, T. Shibauchi, Y. Matsuda, A. Carrington

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61 Citations (Scopus)

Abstract

We report a de Haas-van Alphen oscillation study of the 111 iron pnictide superconductors LiFeAs with T _c18K and LiFeP with T _c5K. We find that for both compounds the Fermi surface topology is in good agreement with density functional band-structure calculations and has almost nested electron and hole bands. The effective masses generally show significant enhancement, up to ∼3 for LiFeP and ∼5 for LiFeAs. However, one hole Fermi surface in LiFeP shows a very small enhancement, as compared with its other sheets. This difference probably results from k-dependent coupling to spin fluctuations and may be the origin of the different nodal and nodeless superconducting gap structures in LiFeP and LiFeAs, respectively.

Original language	English
Article number	047002
Journal	Physical Review Letters
Volume	108
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.108.047002
Publication status	Published - Jan 26 2012
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.108.047002

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title = "De Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs",

abstract = "We report a de Haas-van Alphen oscillation study of the 111 iron pnictide superconductors LiFeAs with T c18K and LiFeP with T c5K. We find that for both compounds the Fermi surface topology is in good agreement with density functional band-structure calculations and has almost nested electron and hole bands. The effective masses generally show significant enhancement, up to ∼3 for LiFeP and ∼5 for LiFeAs. However, one hole Fermi surface in LiFeP shows a very small enhancement, as compared with its other sheets. This difference probably results from k-dependent coupling to spin fluctuations and may be the origin of the different nodal and nodeless superconducting gap structures in LiFeP and LiFeAs, respectively.",

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T1 - De Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs

AU - Putzke, C.

AU - Coldea, A. I.

AU - Guillamón, I.

AU - Vignolles, D.

AU - McCollam, A.

AU - Leboeuf, D.

AU - Watson, M. D.

AU - Mazin, I. I.

AU - Kasahara, S.

AU - Terashima, T.

AU - Shibauchi, T.

AU - Matsuda, Y.

AU - Carrington, A.

PY - 2012/1/26

Y1 - 2012/1/26

N2 - We report a de Haas-van Alphen oscillation study of the 111 iron pnictide superconductors LiFeAs with T c18K and LiFeP with T c5K. We find that for both compounds the Fermi surface topology is in good agreement with density functional band-structure calculations and has almost nested electron and hole bands. The effective masses generally show significant enhancement, up to ∼3 for LiFeP and ∼5 for LiFeAs. However, one hole Fermi surface in LiFeP shows a very small enhancement, as compared with its other sheets. This difference probably results from k-dependent coupling to spin fluctuations and may be the origin of the different nodal and nodeless superconducting gap structures in LiFeP and LiFeAs, respectively.

AB - We report a de Haas-van Alphen oscillation study of the 111 iron pnictide superconductors LiFeAs with T c18K and LiFeP with T c5K. We find that for both compounds the Fermi surface topology is in good agreement with density functional band-structure calculations and has almost nested electron and hole bands. The effective masses generally show significant enhancement, up to ∼3 for LiFeP and ∼5 for LiFeAs. However, one hole Fermi surface in LiFeP shows a very small enhancement, as compared with its other sheets. This difference probably results from k-dependent coupling to spin fluctuations and may be the origin of the different nodal and nodeless superconducting gap structures in LiFeP and LiFeAs, respectively.

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De Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs

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