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Deviating band symmetries and many-body interactions in a model hole doped iron pnictide superconductor
L. A. Wray, R. Thomale, C. Platt +6
We present a polarization resolved study of the low energy band structure in the optimally doped iron pnictide superconductor BaKFeAs (T=37K) using angl…
Nonequilibrium Quasiparticle Relaxation Dynamics in Single Crystals of Hole and Electron doped BaFeAs
Darius H Torchinsky, James W. McIver, David Hsieh +4
We report on the nonequilibrium quasiparticle dynamics in BaFeAs on both the hole doped (BaKFeAs) and electron doped (BaFeCoAs) sides of…
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…
Fermi surface topology and low-lying quasiparticle structure of magnetically ordered Fe1+xTe
Y. Xia, D. Qian, L. Wray +5
We report the first photoemission study of Fe1+xTe - the host compound of the newly discovered iron-chalcogenide superconductors. Our results reveal a pair of nearly electron- hole…
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…
Momentum-dependence of Superconducting Gap, strong-coupling dispersion Kink, and tightly bound Cooper pairs in the high-Tc (Sr,Ba)1-x(K,Na)xFe2As2 superconductors
L. Wray, D. Qian, D. Hsieh +13
We present a systematic angle-resolved photoemission spectroscopic study of the high-Tc superconductor class (Sr/Ba){1-x}(K/Na)xFe2As2. By utilizing a photon-energy-modulation cont…
Tightly-bound Cooper pair, quasiparticle kinks and clues on the pairing potential in a high Tc FeAs Superconductor
L. Wray, D. Qian, D. Hsieh +12
We present a systematic photoemission study of the newly discovered high Tc superconductor class (Sr/Ba)1-xKxFe2As2. By utilizing a unique photon energy range and scattering geomet…
Anomalous metallic state of CuTiSe: an optical spectroscopy study
G. Li, W. Z. Hu, J. Dong +6
We report an optical spectroscopy study on the newly discovered superconductor CuTiSe. Consistent with the development from a semimetal or semiconductor with a very sm…
Emergence of Fermi pockets in an excitonic CDW melted novel superconductor
D. Qian, D. Hsieh, L. Wray +5
A superconducting (SC) state (Tc ~ 4.2K) has very recently been observed upon successful doping of the CDW ordered triangular lattice TiSe, with copper. Using high resolution p…
Low-lying quasiparticle states and hidden collective charge instabilities in parent cobaltate superconductors (NaxCoO2)
D. Qian, D. Hsieh, L. Wray +7
We report a state-of-the-art photoemission (ARPES) study of high quality single crystals of the NaxCoO2 series focusing on the fine details of the low-energy states. The Fermi velo…