Zobrazeno 1 - 10
of 214
pro vyhledávání: '"Alet F"'
Publikováno v:
Phys. Rev. B 92, 174402 (2015)
We investigate the properties in finite magnetic field of an extended anisotropic XXZ spin-1/2 model on the Kagome lattice, originally introduced by Balents, Fisher, and Girvin [Phys. Rev. B, 65, 224412 (2002)]. The magnetization curve displays plate
Externí odkaz:
http://arxiv.org/abs/1505.07943
Publikováno v:
Phys. Rev. B 89, 134408, 2014
We investigate the low-temperature properties of the one-dimensional spin-1 Heisenberg model with geometric fluctuations induced by aperiodic but deterministic coupling distributions, involving two parameters. We focus on two aperiodic sequences, the
Externí odkaz:
http://arxiv.org/abs/1311.5861
Autor:
Nath, R., Ranjith, K. M., Sichelschmidt, J., Baenitz, M., Skourski, Yu., Alet, F., Rousochatzakis, I., Tsirlin, A. A.
Publikováno v:
Phys. Rev. B 89, 014407 (2014)
We present a combined experimental and theoretical study of the spin-1/2 compound CuP$_2$O$_6$ that features a network of two-dimensional (2D) antiferromagnetic (AFM) square planes, interconnected via one-dimensional (1D) AFM spin chains. Magnetic su
Externí odkaz:
http://arxiv.org/abs/1310.8315
Publikováno v:
Modern Physics Letters B, Volume: 25, Issues: 12-13(2011) pp. 917-928
In order to quantify entanglement between two parts of a quantum system, one of the most used estimator is the Von Neumann entropy. Unfortunately, computing this quantity for large interacting quantum spin systems remains an open issue. Faced with th
Externí odkaz:
http://arxiv.org/abs/1011.6530
Publikováno v:
Phys.Rev.B83:060407,2011
The zero-temperature properties of the SO(5) bilinear-biquadratic Heisenberg spin chain are investigated by means of a low-energy approach and large scale numerical calculations. In sharp contrast to the spin-1 SO(3) Heisenberg chain, we show that th
Externí odkaz:
http://arxiv.org/abs/1011.1265
Autor:
Aristov, D. N., Brünger, C., Assaad, F. F., Kiselev, M. N., Weichselbaum, A., Capponi, S., Alet, F.
Publikováno v:
Phys. Rev. B 82, 174410 (2010)
We consider asymmetric spin-1/2 two-leg ladders with non-equal antiferromagnetic (AF) couplings J_|| and \kappa J_|| along legs (\kappa <= 1) and ferromagnetic rung coupling, J_\perp. This model is characterized by a gap \Delta in the spectrum of spi
Externí odkaz:
http://arxiv.org/abs/1008.1644
Autor:
Charrier, D., Alet, F.
Publikováno v:
Phys. Rev. B 82, 014429 (2010)
We present an extensive numerical study of the critical behavior of dimer models in three dimensions, focusing on the phase transition between Coulomb and crystalline columnar phases. The case of attractive interactions between parallel dimers on a p
Externí odkaz:
http://arxiv.org/abs/1005.2522
Publikováno v:
Phys. Rev. B 81, 054438 (2010)
We present a 31P NMR study of the coupled spin 1/2 ladder compound BiCu2PO6. In the pure material, intrinsic susceptibility and dynamics show a spin gap of about . Substitution of non magnetic Zn or magnetic Ni impurity at Cu site induces a staggered
Externí odkaz:
http://arxiv.org/abs/0912.4353
Publikováno v:
Phys. Rev. Lett. 101, 167205 (2008)
We study a phase transition in a 3D lattice gauge theory, a "coarse-grained" version of a classical dimer model. Duality arguments indicate that the dimer lattice theory should be dual to a XY model coupled to a gauge field with geometric frustration
Externí odkaz:
http://arxiv.org/abs/0806.0559
Autor:
Albuquerque, A. F., Alet, F., Corboz, P., Dayal, P., Feiguin, A., Fuchs, S., Gamper, L., Gull, E., Guertler, S., Honecker, A., Igarashi, R., Koerner, M., Kozhevnikov, A., Laeuchli, A., Manmana, S. R., Matsumoto, M., McCulloch, I. P., Michel, F., Noack, R. M., Pawlowski, G., Pollet, L., Pruschke, T., Schollwock, U., Todo, S., Trebst, S., Troyer, M., Werner, P., Wessel, S.
Publikováno v:
Journal of Magnetism and Magnetic Materials 310, 1187 (2007)
We present release 1.3 of the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the simulation of strongly correlated quantum lattice model
Externí odkaz:
http://arxiv.org/abs/0801.1765