Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Torio M"'
Publikováno v:
Physica B: Physics of Condensed Matter 404 (2009) pp. 2805-2808
Going beyond a recently proposed microscopic model for the incommensurate transition in the spin-Peierls TiOX (X=Cl, Br) compounds, in the present work we start by studying the thermodynamics of the model with XY spins and adiabatic phonons. We find
Externí odkaz:
http://arxiv.org/abs/0812.0542
Autor:
Aligia, A. A., Anfossi, A., Arrachea, L., Boschi, C. Degli Esposti, Dobry, A. O., Gazza, C., Montorsi, A., Ortolani, F., Torio, M. E.
Publikováno v:
Phys. Rev. Lett. 99, 206401 (2007)
We determine the quantum phase diagram of the one-dimensional Hubbard model with bond-charge interaction X in addition to the usual Coulomb repulsion U at half-filling. For large enough X and positive U the model shows three phases. For large U the s
Externí odkaz:
http://arxiv.org/abs/0704.0717
An Anderson impurity in a Hubbard model on chains with finite length is studied using the density-matrix renormalization group (DMRG) technique. In the first place, we analyzed how the reduction of electron density from half-filling to quarter-fillin
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608725
Publikováno v:
Phys. Rev. B 73, 193108 (2006) (4 pages)
A quantum dot coupled to ferromagnetically polarized one-dimensional leads is studied numerically using the density matrix renormalization group method. Several real space properties and the local density of states at the dot are computed. It is show
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603168
The electronic properties and spectroscopic features of a magnetic trimer with a Kondo-like coupling to a non-magnetic metallic substrate are analyzed at zero temperature. The substrate density of states is depressed in the trimer neighbourhood, bein
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511480
Publikováno v:
Phys. Rev. B 73, 115109 (2006) (12 pages)
We investigate the ground-state phase diagram of the Hubbard model for the AB$_{N-1}$ chain with filling 1/N, where $N$ is the number of atoms per unit cell. In the strong-coupling limit, a charge transition takes place from a band insulator (BI) to
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511446
The zero-temperature magnetic field-dependent conductance of electrons through a one-dimensional non-interacting tight-binding chain with an interacting {\it side} dot is reviewed and analized further. When the number of electrons in the dot is odd,
Externí odkaz:
http://arxiv.org/abs/cond-mat/0404146
Publikováno v:
Eur. Phys. J. B 37, 399-403 (2004)
We compute the zero bias conductance of electrons through a single ballistic channel weakly coupled to a side quantum dot with Coulomb interaction. In contrast to the standard setup which is designed to measure the transport through the dot, the chan
Externí odkaz:
http://arxiv.org/abs/cond-mat/0401552
We study the half filled Hubbard chain including next-nearest-neighbor hopping $t'$. The model has three phases: one insulating phase with dominant spin-density-wave correlations at large distances (SDWI), another phase with dominant spin-dimer corre
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302106
Publikováno v:
Physical Review B 085302 (2002)
The transmission of electrons through a non-interacting tight-binding chain with an interacting side quantum dot (QD) is analized. When the Kondo effect develops at the dot the conductance presents a wide minimum, reaching zero at the unitary limit.
Externí odkaz:
http://arxiv.org/abs/cond-mat/0108167