Zobrazeno 1 - 10
of 562
pro vyhledávání: '"Everts H"'
Publikováno v:
Phys. Rev. B 84, 224410 (2011)
Frustration has proved to give rise to an extremely rich phenomenology in both quantum and classical systems. The leading behavior of the system can often be described by an effective model, where only the lowest-energy degrees of freedom are conside
Externí odkaz:
http://arxiv.org/abs/1108.5268
We study the properties of the Heisenberg antiferromagnet with spatially anisotropic nearest-neighbour exchange couplings on the kagome net, i.e. with coupling J in one lattice direction and couplings J' along the other two directions. For J/J' > 1,
Externí odkaz:
http://arxiv.org/abs/0704.1441
Publikováno v:
J. Phys.: Condens. Matter 19 (2007) 145249
We investigate the classical counterpart of an effective Hamiltonian for a strongly trimerized kagome lattice. Although the Hamiltonian only has a discrete symmetry, the classical groundstate manifold has a continuous global rotational symmetry. Two
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609312
In the search for spin-1/2 kagome antiferromagnets, the mineral volborthite has recently been the subject of experimental studies [Hiroi et al.,2001]. It has been suggested that the magnetic properties of this material are described by a spin-1/2 Hei
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608393
Publikováno v:
Phys. Rev. A 72, 053612 (2005)
We study low temperature properties of atomic gases in trimerized optical kagom\'{e} lattices. The laser arrangements that can be used to create these lattices are briefly described. We also present explicit results for the coupling constants of the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0506580
Publikováno v:
Phys. Rev. Lett. 95, 060403 (2005)
We study low temperature properties of an atomic spinless interacting Fermi gas in the trimerized Kagom\'e lattice for the case of two fermions per trimer. The system is described by a quantum spin 1/2 model on the triangular lattice with couplings d
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412133
Publikováno v:
Phys. Rev. Lett. 93, 030601 (2004)
We demonstrate the possibility of creating and controlling an ideal and \textit{trimerized} optical Kagom\'e lattice, and study the low temperature physics of various atomic gases in such lattices. In the trimerized Kagom\'e lattice, a Bose gas exhib
Externí odkaz:
http://arxiv.org/abs/cond-mat/0401502
The quasi-particle weight of a single hole in an antiferromagnetic background is studied in the semiclassical approximation. We start from the t-J model, generalize it to arbitrary spin S by employing an appropriate coherent state representation for
Externí odkaz:
http://arxiv.org/abs/cond-mat/0208554
We study the collective diffusion in chain structures on anisotropic substrates like (112) bcc and (110) fcc surfaces with deep troughs in the substrate potential corrugation. These chain structures are aligned normal to the troughs and can move only
Externí odkaz:
http://arxiv.org/abs/cond-mat/0101067
The first order phase transitions between a two-dimensional (2d) gas and the 2d solid of the first monolayer have been studied for the noble gases Ar, Kr and Xe on a NaCl(100) surface in quasi-equilibrium with the three-dimensional gas phase. Using l
Externí odkaz:
http://arxiv.org/abs/cond-mat/9807225