Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Tsitsishvili, G."'
Publikováno v:
Int. J. Mod. Phys. B 36 (2022) 2250197
We consider a tight-binding model defined by a matrix Hamiltonian over 2D Brillouin zone. Multiband energy spectrum gives rise to a non-Abelian gauge structure set by the Berry connections. The corresponding curvature $F_{\mu\nu}$ vanishes throughout
Externí odkaz:
http://arxiv.org/abs/2108.06510
Publikováno v:
J. Phys. Soc. Jpn., Vol.86 (2017) 074712
Tight-binding model on a finite chain is studied with four-fold alternated hopping parameters $t_{1,2,3,4}$. Imposing the open boundary conditions, the corresponding recursion is solved analytically with special attention paid to the occurrence of ed
Externí odkaz:
http://arxiv.org/abs/1706.05522
Publikováno v:
J. Phys. Soc. Jpn., 83 (2014) 044706
Analytic technique based on Chebyshev polynomials is developed for studying two-dimensional lattice ribbons with hopping anisotropy. In particular, the tight-binding models on square and triangle lattice ribbons are investigated with anisotropic near
Externí odkaz:
http://arxiv.org/abs/1401.6770
Publikováno v:
Eur. Phys. J. B (2012) 85: 368
At the filling factor $\nu$=2, the bilayer quantum Hall system has three phases, the spin-ferromagnet phase, the spin singlet phase and the canted antiferromagnet (CAF) phase, depending on the relative strength between the Zeeman energy and interlaye
Externí odkaz:
http://arxiv.org/abs/1207.0003
We present a microscopic theory of the Hall current in the bilayer quantum Hall system on the basis of noncommutative geometry. By analyzing the Heisenberg equation of motion and the continuity equation of charge, we demonstrate the emergence of the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701063
Autor:
Eliashvili, M., Tsitsishvili, G.
Publikováno v:
Eur.Phys.J.C50:1013-1017,2007
Area non-preserving transformations in the non-commutative plane are introduced with the aim to map the $\nu=1$ integer quantum Hall effect (IQHE) state on the fractional quantum Hall effect (FQHE) $\nu=\frac{1}{2p+1}$ FQHE states. Using the hydrodyn
Externí odkaz:
http://arxiv.org/abs/hep-th/0606286
Autor:
Ezawa, Z. F., Tsitsishvili, G.
Publikováno v:
Phys.Rev. D72 (2005) 085002
We analyze topological solitons in the noncommutative plane by taking a concrete instance of the quantum Hall system with the SU(N) symmetry, where a soliton is identified with a skyrmion. It is shown that a topological soliton induces an excitation
Externí odkaz:
http://arxiv.org/abs/hep-th/0509073
Autor:
Tsitsishvili, G., Ezawa, Z. F.
Publikováno v:
Phys.Rev. B72 (2005) 1153
We present a microscopic theory of skyrmions in the monolayer quantum Hall ferromagnet. It is a peculiar feature of the system that the number density and the spin density are entangled intrinsically as dictated by the W$%_{\infty}$ algebra. The skyr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509262
Publikováno v:
Phys.Rev. B71 (2005) 125318
We investigate the ground-state structure of the bilayer quantum Hall system at the filling factor $\nu =2$. Making an exact analysis of the ground state in the SU(4)-invariant limit, we include all other interactions as small perturbation. We carry
Externí odkaz:
http://arxiv.org/abs/cond-mat/0501476
Autor:
Ezawa, Z. F., Tsitsishvili, G.
Publikováno v:
Phys.Rev. B70 (2004) 125304
The bilayer QH system has four energy levels in the lowest Landau level, corresponding to the layer and spin degrees of freedom. We investigate the system in the regime where all four levels are nearly degenerate and equally active. The underlying gr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311406