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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…
Time-reversal-protected single-Dirac-cone topological-insulator states in Bi2Te3 and Sb2Te3: Topologically Spin-polarized Dirac fermions with pi Berry's Phase
D. Hsieh, Y. Xia, D. Qian +12
We show that the strongly spin-orbit coupled materials Bi2Te3 and Sb2Te3 (first non-Bi topological insulator) and their derivatives belong to the Z2 (Time-Reversal-Protected, elast…
Direct observation of localization in the minority-spin-band electrons of magnetite below the Verwey temperature
H. Kobayashi, T. Nagao, M. Itou +5
Two-dimensional spin-uncompensated momentum density distributions, s, were reconstructed in magnetite at 12K and 300K from several measured directional mag…
Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
Y. Xia, D. Qian, D. Hsieh +8
Recent theories and experiments have suggested that strong spin-orbit coupling effects in certain band insulators can give rise to a new phase of quantum matter, the so-called topo…
Topological Control: Systematic control of topological insulator Dirac fermion density on the surface of Bi2Te3
Y. Xia, D. Qian, D. Hsieh +8
Three dimensional (3D) topological insulators are quantum materials with a spin-orbit induced bulk insulating gap that exhibit quantum-Hall-like phenomena in the absence of applied…
Role of Oxygen Electrons in the Metal-Insulator Transition in the Magnetoresistive Oxide LaSrMnO Probed by Compton Scattering
B. Barbiellini, A. Koizumi, P. E. Mijnarends +7
We have studied the [100]-[110] anisotropy of the Compton profile in the bilayer manganite. Quantitative agreement is found between theory and experiment with respect to the anisot…