Possible nodal superconducting gap emerging at the Lifshitz transition in heavily hole-doped Ba0.1K0.9Fe2As2
Xu, N. · Richard, P. · Shi, X. · van Roekeghem, A. · Qian, T. · Razzoli, E. · Rienks, E. · Chen, G. -F. · Ieki, E. · Nakayama, K. · Sato, T. · Takahashi, T. · Shi, M. · Ding, H.
Original · EN
We performed a high energy resolution ARPES investigation of over-doped Ba0.1K0.9Fe2As2 with Tc= 9 K. The Fermi surface topology of this material is similar to that of KFe2As2 and differs from that of slightly less doped Ba0.3K0.7Fe2As2, implying that a Lifshitz transition occurred between x=0.7 and x=0.9. Albeit for a vertical node found at the tip of the emerging off-M-centered Fermi surface pocket lobes, the superconducting gap structure is similar to that of Ba0.3K0.7Fe2As2, suggesting that the paring interaction is not driven by the Fermi surface topology.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.