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Non-monotonic Fermi surface evolution and its correlation with stripe ordering in bilayer manganites
Z. Sun, Q. Wang, J. F. Douglas +11
In correlated electron systems such as cuprate superconductors and colossal magnetoresistive (CMR) oxides there is often a tendency for a nanoscale self-organization of electrons t…
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…
First direct observation of Dirac fermions in graphite
S. Y. Zhou, G. -H. Gweon, J. Graf +7
Originating from relativistic quantum field theory, Dirac fermions have been recently applied to study various peculiar phenomena in condensed matter physics, including the novel q…
Quasiparticle coherence and the nature of the metal-insulator phase transition in NaCoO
D. Qian, L. Wray, D. Hsieh +7
Layered cobaltates embody novel realizations of correlated quantum matter on a spin-1/2 triangular lattice. We report a high-resolution systematic photoemission study of the insula…
Quasiparticle-like peaks, kinks, and electron-phonon coupling at the (,0) regions in the CMR oxide LaSrMnO
Z. Sun, Y. -D. Chuang, A. V. Fedorov +11
Using Angle-Resolved Photoemission (ARPES), we present the first observation of sharp quasiparticle-like peaks in a CMR manganite. We focus on the (,0) regions of k-space and st…
Nature of Correlated Motion of Electrons in the Parent Cobaltate Superconductors
M. Z. Hasan, D. Qian, Y. Li +5
Recently discovered class of cobaltate superconductors (Na0.3CoO2.nH2O) is a novel realization of interacting quantum electron systems in a triangular network with low-energy degre…