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Green's function theory of quasi-two-dimensional spin-half Heisenberg ferromagnets: stacked square versus stacked kagomé lattice | | D. Schmalfu{ss}
; J. Richter
; D. Ihle
; | | Date: |
26 Apr 2005 | | Subject: | Strongly Correlated Electrons; Statistical Mechanics | cond-mat.str-el cond-mat.stat-mech | | Abstract: | We consider the thermodynamic properties of the quasi-two-dimensional spin-half Heisenberg ferromagnet on the stacked square and the stacked kagomé lattices by using the spin-rotation-invariant Green’s function method. We calculate the critical temperature $T_C$ in dependence on the interlayer coupling $J_perp$, the uniform static susceptibility $chi$, the correlation lengths $xi$, the magnetization $M$ and the specific heat $C$ and investigate the short-range order above $T_C$. We find that the finite-temperature magnetization and the critical temperature are smaller for the stacked kagomé lattice which we attribute to frustration effects becoming relevant at finite temperatures. | | Source: | arXiv, cond-mat/0504662 | | Services: | Forum | Review | PDF | Favorites | |
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