Zobrazeno 1 - 10
of 583
pro vyhledávání: '"Kohmoto M"'
Publikováno v:
New J. Phys. 14, 113012 (2012)
We study the stationary states for the nonlinear Schr\"odinger equation on the Fibonacci lattice which is expected to be realized by Bose-Einstein condensates loaded into an optical lattice. When the model does not have a nonlinear term, the wavefunc
Externí odkaz:
http://arxiv.org/abs/1110.6328
Autor:
Kohmoto, M., Sedrakyan, A.
Publikováno v:
Phys. Rev. B 73, 235118 (2006)
We consider Bloch electrons on the honeycomb lattice under a uniform magnetic field with $2 \pi p/q$ flux per cell. It is shown that the problem factorizes to two triangular lattices. Treating magnetic translations as Heisenberg-Weyl group and by the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603285
Motivated by the geometric character of spin Hall conductance, the topological invariants of generic superconductivity are discussed based on the Bogoliuvov-de Gennes equation on lattices. They are given by the Chern numbers of degenerate condensate
Externí odkaz:
http://arxiv.org/abs/cond-mat/0308332
Autor:
Friedel, J., Kohmoto, M.
Recent results on electrons and holes doped CuO 2 planes confirm the marked covalency of CuO bonding, suggesting a band picture of long and short range antiferromagnetism. The maxima of superconductive T c versus doping can be related to the crossing
Externí odkaz:
http://arxiv.org/abs/cond-mat/0204337
Autor:
Goryo, J., Kohmoto, M.
Publikováno v:
Phys. Rev. B 66, 085118 (2002)
We consider Bloch electrons in the presence of the uniform electromagnetic field in two- and three-dimensions. It is renowned that the quantized Hall effect occurs in such systems. We suppose a weak and homogeneous electric field represented by the t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0201454
Autor:
Goryo, J., Kohmoto, M.
Publikováno v:
J. Phys. Soc. Jpn. Vol.71, 1403 (2002)
We consider Bloch electrons in the electromagnetic field and argue the relation between the Berry phase and the quantized Hall conductivity in three-dimension. The Berry phase we consider here is induced by the adiabatic change of the time-dependent
Externí odkaz:
http://arxiv.org/abs/cond-mat/0201389
Autor:
Friedel, J., Kohmoto, M.
Phonon or electron mediated weak BCS attraction is enough to have high critical temperature if a van Hove anomaly is at work. This could apply to electron doped compounds and also to compounds with CuO$_2$ planes overdoped in holes, where $T_c$ decre
Externí odkaz:
http://arxiv.org/abs/cond-mat/9901065
Use is made of Onsager's hydrodynamic equation to derive the vibration spectrum of the vortex lattice in d-wave superconductor. In particular the rhombic lattice (i.e. the $45^\circ$ tilted square lattice) is found to be stable for $B>H_{cr}(t)$. Her
Externí odkaz:
http://arxiv.org/abs/cond-mat/9810335
Publikováno v:
Epidemiology and Infection, 2003 Oct 01. 131(2), 939-946.
Externí odkaz:
https://www.jstor.org/stable/3865307
Stationary solutions of the Chern-Simons effective field theory for the fractional quantum Hall systems with edges are presented for Hall bar, disk and annulus. In the infinitely long Hall bar geometry (non compact case), the charge density is shown
Externí odkaz:
http://arxiv.org/abs/cond-mat/9710309