Zobrazeno 1 - 10
of 297
pro vyhledávání: '"Zaleski T"'
Autor:
Singh, Karan, Dan, Shovan, Ptok, A., Zaleski, T. A., Pavlosiuk, O., Wiśniewski, P., Kaczorowski, D.
We report magnetic and transport properties of single-crystalline EuZn$_{2}$P$_{2}$, which has trigonal CaAl$_2$Si$_2$-type crystal structure and orders antiferromagnetically at $\approx$23~K. Easy $ab$-plane magneto-crystalline anisotropy was confir
Externí odkaz:
http://arxiv.org/abs/2307.11924
Autor:
Zaleski, T. A., Kopec, T. K.
Publikováno v:
Physica B 433, 37-42 (2014)
Trapping ultra-cold atoms in optical lattices provides a unique environment for investigating quantum phase transitions between strongly correlated superfluid and Mott insulator phases. One of the major complications in the analysis of experiments is
Externí odkaz:
http://arxiv.org/abs/1510.04447
Finite temperature superfluid transition of strongly-correlated lattice bosons in various geometries
Autor:
Zaleski, T. A., Kopec, T. K.
Publikováno v:
Physica B 456, 244-249 (2015)
We study finite-temperature properties of the strongly interacting bosons in three-dimensional lattices by employing the combined Bogoliubov method and the quantum rotor approach. Based on the mapping of the Bose-Hubbard Hamiltonian of strongly inter
Externí odkaz:
http://arxiv.org/abs/1510.04449
Autor:
Polak, T. P., Zaleski, T. A.
Publikováno v:
Phys. Rev. A 87, 033614 (2013); http://pra.aps.org/abstract/PRA/v87/i3/e033614
We calculate the time-of-flight patterns of strongly interacting bosons confined in two-dimensional square lattice in the presence of an artificial magnetic field using quantum rotor model that is inherently combined with the Bogolyubov approach. We
Externí odkaz:
http://arxiv.org/abs/1304.1176
Autor:
Zaleski, T. A., Kopeć, T. K.
Publikováno v:
Phys. Rev. A 84, 053613 (2011)
We study the spatial correlations of strongly interacting bosons in a ground state, confined in two-dimensional square and three-dimensional cubic lattice. Using combined Bogoliubov method and the quantum rotor approach, we map the Hamiltonian of str
Externí odkaz:
http://arxiv.org/abs/1201.3788
Autor:
Zaleski, T. A., Polak, T. P.
Publikováno v:
Phys. Rev. A 83, 023607 (2011)
We discuss a system of dilute Bose gas confined in a layered structure of stacked square lattices (slab geometry). A derived phase diagram reveals a non-monotonic dependence of the ratio of tunneling to on-site repulsion on the artificial magnetic fi
Externí odkaz:
http://arxiv.org/abs/1102.3283
Autor:
Zaleski, T. A., Kopec, T. K.
Using recently developed quantum SU(2)xU(1) rotor approach, that provides a self-consistent treatment of the antiferromagnetic state we have performed electronic spectral function calculations for the Hubbard model on the square lattice. The collecti
Externí odkaz:
http://arxiv.org/abs/0901.4649
Autor:
Zaleski, T. A., Kopec, T. K.
Publikováno v:
Phys. Rev. B 77, 125120 (2008)
The antiferromagnetic phase of two-dimensional (2D) and three-dimensional (3D) Hubbard model with nearest neighbors hopping is studied on a bipartite cubic lattice by means of the quantum SU(2)xU(1) rotor approach that yields a fully self-consistent
Externí odkaz:
http://arxiv.org/abs/0811.0248
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Autor:
Zaleski, T. A., Kopec, T. K.
We study a model of YBa2Cu3O(6+y) to investigate the influence of oxygen ordering and doping imbalance on the critical temperature Tc(y) and to elucidate a possible origin of well-known feature of YBCO phase diagram: the 60-K plateau. Focusing on "ph
Externí odkaz:
http://arxiv.org/abs/cond-mat/0601257