scholarly journals Nodeless superconducting gap in AxFe2Se2 (A=K,Cs) revealed by angle-resolved photoemission spectroscopy

2011 ◽  
Vol 10 (4) ◽  
pp. 273-277 ◽  
Author(s):  
Y. Zhang ◽  
L. X. Yang ◽  
M. Xu ◽  
Z. R. Ye ◽  
F. Chen ◽  
...  
Keyword(s):  
Photoemission Spectroscopy ◽  
Superconducting Gap ◽  
Angle Resolved Photoemission Spectroscopy

scholarly journals Three-dimensional superconducting gap in FeSe from angle-resolved photoemission spectroscopy

2018 ◽  
Vol 97 (18) ◽  
Author(s):  
Y. S. Kushnirenko ◽  
A. V. Fedorov ◽  
E. Haubold ◽  
S. Thirupathaiah ◽  
T. Wolf ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Photoemission Spectroscopy ◽  
Superconducting Gap ◽  
Angle Resolved Photoemission Spectroscopy

scholarly journals Angle-resolved photoemission spectroscopy study of the superconducting gap anisotropy inBi2Sr2CaCu2O8+x

1996 ◽  
Vol 54 (14) ◽  
pp. R9678-R9681 ◽  
Author(s):  
H. Ding ◽  
M. R. Norman ◽  
J. C. Campuzano ◽  
M. Randeria ◽  
A. F. Bellman ◽  
...  
Keyword(s):  
Photoemission Spectroscopy ◽  
Superconducting Gap ◽  
Spectroscopy Study ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Gap Anisotropy

scholarly journals Revealing the intrinsic superconducting gap anisotropy in surface-neutralized BaFe2(As0.7P0.3)2

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Ziming Xin ◽  
Yudi Wang ◽  
Cong Cai ◽  
Zhengguo Wang ◽  
Lei Chen ◽  
...  
Keyword(s):  
Alkaline Earth ◽  
Theoretical Models ◽  
Photoemission Spectroscopy ◽  
Superconducting Gap ◽  
Iron Based Superconductors ◽  
Future Studies ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Gap Anisotropy ◽  
Iron Based ◽  
Potassium Deposition

AbstractAlkaline-earth iron arsenide (122) is one of the most studied families of iron-based superconductors, especially for angle-resolved photoemission spectroscopy. While extensive photoemission results have been obtained, the surface complexity of 122 caused by its charge-non-neutral surface is rarely considered. Here, we show that the surface of 122 can be neutralized by potassium deposition. In potassium-coated BaFe2(As0.7P0.3)2, the surface-induced spectral broadening is strongly suppressed, and hence the coherent spectra that reflect the intrinsic bulk electronic state recover. This enables the measuring of superconducting gap with unpreceded precision. The result shows the existence of two pairing channels. While the gap anisotropy on the outer hole/electron pockets can be well fitted using an s± gap function, the gap anisotropy on the inner hole/electron shows a clear deviation. Our results provide quantitative constraints for refining theoretical models and also demonstrate an experimental method for revealing the intrinsic electronic properties of 122 in future studies.

Sign in / Sign up

Export Citation Format

Share Document