Publications by Dmitry Kovrizhin


Bose-Einstein condensation of magnons in Cs2CuCl4: A dilute gas limit near the saturation magnetic field

Physical review B: Condensed matter and materials physics American Physical Society 74 (2006) ARTN 134417-

D Kovrizhin, V Yushankhai, L Siurakshina

Based on the realistic spin Hamiltonian for the frustrated quasi-two-dimensional spin-1∕2 antiferromagnet Cs2CuCl4, a three-dimensional spin ordering in the applied magnetic field B near the saturation value Bc 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 Cs2CuCl4 is calculated. In the dilute magnon limit near Bc, the hard-core boson constraint results in an effective magnon interaction which is treated in the Hartree-Fock approximation. The critical temperature Tc is calculated as a function of the magnetic field B and compared with the phase boundary Tc(B) experimentally determined in Cs2CuCl4


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