379 citations · 1.6k across the 21 of their papers we have counts for
11 papers · 2 filters
Unconventional Anisotropic s-Wave Superconducting Gaps of LiFeAs Iron-Pnictide Superconductor
K. Umezawa, Y. Li, H. Miao +10
We have performed high-resolution angle-resolved photoemission spectroscopy on Fe-based superconductor LiFeAs (Tc = 18 K). We reveal multiple nodeless superconducting (SC) gaps wit…
Two-magnon Raman scattering in AFeSe systems: competition between superconductivity and antiferromagnetic order
A. M. Zhang, J. H. Xiao, Y. S. Li +6
We have performed Raman-scattering measurements on high-quality single crystals of AFeSe superconductors of several compositions. We find a broad, asymmetric pe…
Effect of iron content and potassium substitution in AFeSe (A = K, Rb, Tl) superconductors: a Raman-scattering investigation
A. M. Zhang, K. Liu, J. H. Xiao +5
We have performed Raman-scattering measurements on high-quality single crystals of the superconductors KFeSe ( = 32 K), TlKFeSe…
Intrinsic Percolative Superconductivity in KxFe2-ySe2 Single Crystals
B. Shen, B. Zeng, G. F. Chen +4
Magnetic field penetration and magnetization hysteresis loops (MHLs) have been measured in KxFe2-ySe2 single crystals. The magnetic field penetration shows a two-step feature with…
Local spin fluctuations in iron-based superconductors: 77Se and 87Rb NMR measurements of Tl0.47Rb0.34Fe1.63Se2
Long Ma, G. F. Ji, J. Dai +5
We report nuclear magnetic resonance (NMR) studies of the intercalated iron selenide superconductor (Tl, Rb)FeSe ( K). Single-crystal measurements up to…
On the Structure of Vacancy Ordered Superconducting Alkali Metal Iron Selenide
P. Zavalij, Wei Bao, X. F. Wang +9
With single crystal X-ray diffraction studies, we compare the structures of three sample showing optimal superconductivity, K0.774(4)Fe1.613(2)Se2, K0.738(6)Fe1.631(3)Se2 and Cs0.7…
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
Lin Zhao, Daixiang Mou, Shanyu Liu +22
We carried out high resolution angle-resolved photoemission measurements on the electronic structure and superconducting gap of K_0.68Fe_1.79Se_2 (T_c=32 K) and (Tl_0.45K_0.34)Fe_1…
A Novel Large Moment Antiferromagnetic Order in K0.8Fe1.6Se2 Superconductor
Wei Bao, Q. Huang, G. F. Chen +5
The discovery of cuprate high Tc superconductors has inspired searching for unconventional su- perconductors in magnetic materials. A successful recipe has been to suppress long-ra…
The effect of varying Fe-content on transport properties of K intercalated iron selenide KxFe2-ySe2
D. M. Wang, J. B. He, T. -L. Xia +1
We report the successful growth of high-quality single crystals of potassium intercalated iron selenide KxFe2-ySe2 by Bridgeman method. The effect of iron vacancies on transport pr…
Vacancy ordering and phonon spectrum in the Fe superconductor KFeSe
A. M. Zhang, K. Liu, J. H. Xiao +5
We have performed Raman-scattering measurements on a high-quality single crystal of the recently discovered Fe-based superconductor KFeSe ( = 32 K). At lea…
77Se NMR study of pairing symmetry and spin dynamics in KyFe2-xSe2
Weiqiang Yu, L. Ma, J. B. He +4
We present a 77Se NMR study of the newly discovered iron selenide superconductor KyFe2-xSe2, in which Tc = 32 K. Below Tc, the Knight shift 77K drops sharply with temperature, prov…