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Superconducting state in the non-centrosymmetric Mg_{9.3}Ir_{19}B_{16.7} and Mg_{10.5}Ir_{19}B_{17.1} revealed by NMR
K. Tahara, Z. Li, H. X. Yang +3
We report ^{11}B NMR measurements in non-centrosymmetric superconductors Mg_{9.3}Ir_{19}B_{16.7} (T_c=5.8 K) and Mg_{10.5}Ir_{19}B_{17.1} (T_c=4.8 K). The spin lattice relaxation r…
Fermi surface topology and low-lying quasiparticle dynamics of parent FeTe/Se Superconductor by orbital-polarization resolved ARPES
Y. Xia, D. Qian, L. Wray +5
We report the first photoemission study of FeTe - the host compound of the newly discovered iron-chalcogenide superconductors (maximum T 27K). Our results reveal…
Homogeneous vs. inhomogeneous coexistence of magnetic order and superconductivity probed by NMR in Co and K doped iron pnictides
M. -H. Julien, H. Mayaffre, M. Horvatic +6
In Ba(Fe0.95Co0.05)2As2 all of the 75As NMR intensity at the paramagnetic resonance position vanishes abruptly below Tonset(SDW)=56 K, indicating that magnetic (spin density wave)…
Origin of the structural phase transition at 130 K in BaNiAs: a combined study of optical spectroscopy and band structure calculations
Z. G. Chen, G. Xu, W. Z. Hu +6
BaNiAs exhibits a first order structural transition at 130 K. Understanding this structural transition is a crucial step towards understanding the electronic properties of…
Electronic Structure of the BaFeAs Family of Iron Pnictides
M. Yi, D. H. Lu, J. G. Analytis +11
We use high resolution angle-resolved photoemission spectroscopy to study the band structure and Fermi surface topology of the BaFeAs iron pnictides. We observe two electro…
Experimental determination of the microscopic origin of magnetism in parent iron pnictides
D. Hsieh, Y. Xia, L. Wray +7
Like high Tc cuprates, the newly discovered iron based superconductors lie in close proximity to a magnetically ordered parent phase. However, while the magnetic order in parent cu…