Distinct Fermi Surface Topology and Nodeless Superconducting Gap in a (Tl0.58Rb0.42)Fe1.72Se2 Superconductor
Daixiang Mou, Shanyu Liu, Xiaowen Jia, Junfeng He, Yingying Peng, Lin Zhao, Li Yu, Guodong Liu, Shaolong He, Xiaoli Dong, Jun Zhang, Hangdong Wang, Chiheng Dong, Minghu Fang, Xiaoyang Wang, Qinjun Peng, Zhimin Wang, Shenjin Zhang, Feng Yang, Zuyan Xu, Chuangtian Chen, X. J. Zhou
DOI 10.1103/PhysRevLett.106.107001 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
High resolution angle-resolved photoemission measurements have been carried out to study the electronic structure and superconducting gap of the (Tl0.58Rb0.42)Fe1.72Se2 superconductor with a Tc=32 K. The Fermi surface topology consists of two electronlike Fermi surface sheets around the Γ point which is distinct from that in all other iron-based superconductors reported so far. The Fermi surface around the M point shows a nearly isotropic superconducting gap of ∼12 meV. The large Fermi surface near the Γ point also shows a nearly isotropic superconducting gap of ∼15 meV, while no superconducting gap opening is clearly observed for the inner tiny Fermi surface. Our observed new Fermi surface topology and its associated superconducting gap will provide key insights and constraints into the understanding of the superconductivity mechanism in iron-based superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (Tl0.58Rb0.42)Fe1.72Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 32 | Pressure not reported | onset |
Similar papers
Common Fermi-surface topology and nodeless superconducting gap of K0.68Fe1.79Se2 and (Tl0.45K0.34)Fe1.84Se2 superconductors revealed via angle-resolved photoemission
similarity 0.96Lin Zhao et al.
Source status unknown — claims are unverified
Distinct Fermi Surface Topology and Nodeless Superconducting Gap in (Tl0.58Rb0.42)Fe1.72Se2 Superconductor
similarity 0.96Daixiang Mou et al. · 2011 · arXiv:1101.4556
Source status unknown — claims are unverified
Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe0.55Se0.45
similarity 0.93H. Miao et al.
Source status unknown — claims are unverified
Common Fermi Surface Topology and Nodeless Superconducting Gap in K0.68Fe1.79Se2 and (Tl0.45K0.34)Fe1.84Se2 Superconductors Revealed from Angle-Resolved Photoemission Spectroscopy
similarity 0.93Lin Zhao et al. · 2011 · arXiv:1102.1057
Source status unknown — claims are unverified
Absence of a Holelike Fermi Surface for the Iron-Based K0.8Fe1.7Se2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy
similarity 0.93T. Qian et al.
Source status unknown — claims are unverified
Topological Superconductivity on the Surface of Fe-Based Superconductors
similarity 0.93Gang Xu et al.
Source status unknown — claims are unverified