De Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs
Physical Review Letters 108:4 (2012)
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. ? 2012 American Physical Society.21pGL-13 LiFe(As,P)純良単結晶における電子状態と超伝導(21pGL 鉄砒素系(111,1111系),領域8(強相関系:高温超伝導,強相関f電子系など))
(2011) 488
Reply to Comment by Borisenko et al. on article `A de Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs'
ArXiv 1108.3956 (2011)
Abstract:
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 our measurements of the bulk Fermi surface were not consistent with the surface bands observed thus far by ARPES. Borisenko et al dispute this and suggest the two measurements are consistent if some of the orbits we observe are due to magnetic breakdown. We argue here that this scenario is inconsistent with the experimental data and therefore that our original conclusion stands.A de Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs
(2011)
Nesting of electron and hole Fermi surfaces in non-superconducting BaFe_2P_2
(2011)