Zobrazeno 1 - 10
of 364
pro vyhledávání: '"Moliner M"'
Publikováno v:
Phys. Rev. B 92, 075140 (2015)
The zero-temperature phase diagram of $p$-orbital two-component fermionic system loaded into a one-dimensional optical lattice is mapped out by means of analytical and numerical techniques. It is shown that the $p$-band model away from half-filling h
Externí odkaz:
http://arxiv.org/abs/1505.06715
Publikováno v:
Phys. Rev. B 91, 075121 (2015)
We investigate possible realizations of exotic SU(N) symmetry-protected topological (SPT) phases with alkaline-earth cold fermionic atoms loaded into one-dimensional optical lattices. A thorough study of two-orbital generalizations of the standard SU
Externí odkaz:
http://arxiv.org/abs/1410.2974
Autor:
Moliner, M., Schmitteckert, P.
Publikováno v:
Phys. Rev. Lett. 111, 120602 (2013), Editors' Suggestion
We present a novel numerical approach to track the response of a quantum system to an external perturbation that is progressively switched-on. The method is applied, within the framework of the density matrix renormalization group technique, to track
Externí odkaz:
http://arxiv.org/abs/1307.2762
Publikováno v:
Phys. Rev. B 88, 075132 (2013)
Four-spin exchange interaction has been raising intriguing questions regarding the exotic phase transitions it induces in two-dimensional quantum spin systems. In this context, we investigate the effects of a cyclic four-spin exchange in the quasi-1D
Externí odkaz:
http://arxiv.org/abs/1304.6877
Publikováno v:
EPL 102 37008 (2013)
We investigate the existence of symmetry-protected topological phases in one-dimensional alkaline-earth cold fermionic atoms with general half-integer nuclear spin I at half filling. In this respect, some orbital degrees of freedom are required. They
Externí odkaz:
http://arxiv.org/abs/1210.2072
Publikováno v:
Phys. Rev. B 84, 174407 (2011)
We analyze the phase transition of the frustrated $J_1$-$J_2$ Ising model with antiferromagnetic nearest- and strong next-nearest neighbor interactions on the square lattice. Using extensive Monte Carlo simulations we show that the nature of the phas
Externí odkaz:
http://arxiv.org/abs/1105.4836
Publikováno v:
Phys. Rev. B 83, 140414(R) (2011)
Motivated by the on-going investigation of SrCu$_2$(BO$_3$)$_2$ under pressure, we study a variant of the two-dimensional Shastry-Sutherland (SS) spin-1/2 model with two types of dimers. Combined with the frustration of the SS model, this modificatio
Externí odkaz:
http://arxiv.org/abs/1012.5177
Publikováno v:
J. Phys.: Conf. Ser. 145, 012053 (2009)
We investigated the classical Shastry-Sutherland lattice under an external magnetic field in order to understand the recently discovered magnetization plateaux in the rare-earth tetraborides compounds RB$_4$. A detailed study of the role of thermal f
Externí odkaz:
http://arxiv.org/abs/0903.1985
Publikováno v:
Phys. Rev. B 79, 144401 (2009)
We investigate classical Heisenberg spins on the Shastry-Sutherland lattice and under an external magnetic field. A detailed study is carried out both analytically and numerically by means of classical Monte-Carlo simulations. Magnetization pseudo-pl
Externí odkaz:
http://arxiv.org/abs/0809.5249
Publikováno v:
Phys. Rev. B 74, 014428 (2006)
We investigate a simple model of a frustrated classical spin chain coupled to adiabatic phonons under an external magnetic field. A thorough study of the magnetization properties is carried out both numerically and analytically. We show that already
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603514