Cyclic exchange, isolated states, and spinon deconfinement in an XXZ Heisenberg model on the checkerboard lattice
نویسندگان
چکیده
Nic Shannon,1,2 Grégoire Misguich,3 and Karlo Penc4 1Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo, 5-1-5, Kashiwahnoha, Kashiwa, Chiba 277-8851, Japan 2CREST, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan 3Service de Physique Théorique, CEA-Saclay, 91191 Gif-sur-Yvette Cédex, France 4Research Institute for Theoretical Solid State Physics and Optics, H-1525 Budapest, P.O.B. 49, Hungary (Received 25 March 2004; published 10 June 2004)
منابع مشابه
Dynamics of the antiferromagnetic Heisenberg spin − 1 / 2 chain
In magnetic systems, interactions between electrons can be described by an effective spinspin interaction. When the wavefunctions of the electrons overlap mainly in one direction, the system behaves as an effectively one-dimensional spin chain. A special class of such a spin chain is the anisotropic Heisenberg model, also called the XXZ model. Exact wavefunctions for the (gapped) antiferromagne...
متن کامل0 Ju n 20 06 Exotic phenomena in doped quantum magnets
We investigate the properties of the two-dimensional frustrated quantum antiferromagnet on the square lattice, especially at infinitesimal doping. We find that next nearest neighbor (N.N.) J 2 and next-next N.N. J 3 interactions together destroy the antiferromagnetic long range order and stabilize a quantum disordered valence bond crystalline plaquette phase. A static vacancy or a dynamic hole ...
متن کاملJ ul 2 00 6 Exotic phenomena in doped quantum magnets
We investigate the properties of the two-dimensional frustrated quantum antiferromagnet on the square lattice, especially at infinitesimal doping. We find that next nearest neighbor (N.N.) J 2 and next-next N.N. J 3 interactions together destroy the antiferromagnetic long range order and stabilize a quantum disordered valence bond crystalline plaquette phase. A static vacancy or a dynamic hole ...
متن کاملInterfaces and droplets in quantum lattice models
This paper is a short review of recent results on interface states in the Falicov-Kimball model and the ferromagnetic XXZ Heisenberg model. More specifically, we discuss the following topics: 1) The existence of interfaces in quantum lattice models that can be considered as perturbations of classical models. 2) The rigidity of the 111 interface in the three-dimensional FalicovKimball model at s...
متن کاملVariational study of triangular lattice spin - 1 / 2 model with ring exchanges and spin liquid state in - „ ET ... 2
We study triangular lattice spin-1 /2 system with antiferromagnetic Heisenberg and ring exchanges using variational approach focusing on possible realization of spin-liquid states. Trial spin liquid wave functions are obtained by Gutzwiller projection of fermionic mean-field states and their energetics is compared against magnetically ordered trial states. We find that in a range of the ring ex...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004