Thermodynamic properties of the field-induced Neel order of TlCuCl3

Details Thermodynamic properties of the field-induced Neel order of TlCuCl3 Thermodynamic properties of the field-induced Neel order of TlCuCl3

2006-10-17

arxiv.org/abs/cond-mat/0610487v1

J. Magn. Magn. Mat. 310, 1374 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 3 figures; Proceedings of ICM'06, Kyoto

Scientific paper

TlCuCl3 shows a quantum phase transition from a spin-gap phase to a Neel-ordered ground state as a function of magnetic field around H_{C0}~4.8T. From measurements of the specific heat c and the linear thermal expansion alpha_i we calculate the Grueneisen parameter Gamma_i(T)=alpha_i/c. Close to H_{C0} we find a diverging Gamma_i(T->0, in qualitative agreement with theoretical predictions. However, the predicted individual temperature dependencies of alpha(T) and c(T) are not reproduced by our experimental data.

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