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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…
Kohn anomaly and interplay of electron-electron and electron-phonon interactions in epitaxial graphene
S. Y. Zhou, D. A. Siegel, A. V. Fedorov +1
The interplay of electron-phonon (el-ph) and electron-electron (el-el) interactions in epitaxial graphene is studied by directly probing its electronic structure. We found a strong…
Core Level and Valence Band Study of LaOFFeAs
D. R. Garcia, C. Jozwiak, C. G. Hwang +8
Using angle-integrated photoemission spectroscopy we have probed the novel LaOFFeAs superconductor over a wide range of photon energies and temperatures. We have pr…
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…
Origins of large critical temperature variations in single layer cuprates
A. D. Palczewski, T. Kondo, R. Khasanov +14
We study the electronic structures of two single layer superconducting cuprates, TlBaCuO (Tl2201) and (BiPb)(SrLa)CuO (B…
The Fermi surface of Ba(1-x)K(x)Fe2As2 and its evolution with doping
C. Liu, G. D. Samolyuk, Y. Lee +11
We use angle-resolved photoemission spectroscopy (ARPES) to investigate the electronic properties of the newly discovered iron-arsenic superconductor, Ba(1-x)K(x)Fe2As2 and non-sup…
Origin of the energy bandgap in epitaxial graphene
S. Y. Zhou, D. A. Siegel, A. V. Fedorov +4
We studied the effect of quantum confinement on the size of the band gap in single layer epitaxial graphene. Samples with different graphene terrace sizes are studied by using low…
Anisotropic Electron-Phonon Coupling and Dynamical Nesting on the Graphene Sheets in CaC6
T. Valla, J. Camacho, Z-H. Pan +4
Superconductivity in graphite intercalated compounds has been studied for more than 40 years and it is still not fully understood, despite the recent progress and the discovery of…