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22 papers · 2 filters
Possible existence of a band of extended states induced by inter-Landau-band mixing in quantum Hall system
Gang Xiong, Shi-Dong Wang, Qian Niu +4
The mixing of states with {\it opposite chirality} in quantum Hall system is shown to have delocalization effect. It is possible that extended states may form bands because of this…
Spectroscopic properties of large open quantum-chaotic cavities with and without separated time scales
E. N. Bulgakov, I. Rotter
The spectroscopic properties of an open large Bunimovich cavity are studied numerically in the framework of the effective Hamiltonian formalism. The cavity is opened by attaching l…
Statistical study of the conductance and shot noise in open quantum-chaotic cavities: Contribution from whispering gallery modes
Evgeny N. Bulgakov, Victor A. Gopar, Pier A. Mello +1
In the past, a maximum-entropy model was introduced and applied to the study of statistical scattering by chaotic cavities, when short paths may play an important role in the scatt…
One-dimensional semirelativity for electrons in carbon nanotubes
Wlodek Zawadzki
It is shown that the band structure of single-wall semiconducting carbon nanotubes (CNT) is analogous to relativistic description of electrons in vacuum, with the maximum velocity…
Bias-controllable intrinsic spin polarization in a quantum dot
Qing-feng Sun, X. C. Xie
We propose a novel scheme to efficiently polarize and manipulate the electron spin in a quantum dot. This scheme is based on the spin-orbit interaction and it possesses following a…
Spontaneous currents in a ferromagnet - normal metal - superconductor trilayer
M. Krawiec, J. F. Annett, B. L. Gyorffy
We discuss the ground state properties of the system composed of a normal metal sandwiched between ferromagnet and superconductor within a tight binding Hubbard model. We have solv…