Bose-Einstein condensation of magnons in Cs{sub 2}CuCl{sub 4}: A dilute gas limit near the saturation magnetic field
- Max-Planck-Institut fuer Physik Komplexer Systeme, Noethnitzer Strasse 38, 01187 Dresden (Germany)
- Max-Planck-Institut fuer Chemische Physik Fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany)
Based on the realistic spin Hamiltonian for the frustrated quasi-two-dimensional spin-1/2 antiferromagnet Cs{sub 2}CuCl{sub 4}, a three-dimensional spin ordering in the applied magnetic field B near the saturation value B{sub c} is studied within the magnon Bose-Einstein condensation scenario. Using a hard-core boson formulation of the spin model, a strongly anisotropic magnon dispersion in Cs{sub 2}CuCl{sub 4} is calculated. In the dilute magnon limit near B{sub c}, the hard-core boson constraint results in an effective magnon interaction which is treated in the Hartree-Fock approximation. The critical temperature T{sub c} is calculated as a function of the magnetic field B and compared with the phase boundary T{sub c}(B) experimentally determined in Cs{sub 2}CuCl{sub 4} [Phys. Rev. Lett. 95, 127202 (2005)].
- OSTI ID:
- 20853741
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 74, Issue 13; Other Information: DOI: 10.1103/PhysRevB.74.134417; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Extended Scattering Continua Characteristic of Spin Fractionalization in the Two-dimensional Frustrated Quantum Magnet Cs2CuCl4Observed by Neutron Scattering
Magneto-acoustic study near the quantum critical point of the frustrated quantum antiferromagnet Cs{sub 2}CuCl{sub 4}