Thermodynamics of the spin Luttinger liquid in a model ladder material.
نویسندگان
چکیده
The phase diagram in temperature and magnetic field of the metal-organic, two-leg, spin-ladder compound (C5H12N)2CuBr4 is studied by measurements of the specific heat and the magnetocaloric effect. We demonstrate the presence of an extended spin Luttinger-liquid phase between two field-induced quantum critical points and over a broad range of temperature. Based on an ideal spin-ladder Hamiltonian, comprehensive numerical modeling of the ladder specific heat yields excellent quantitative agreement with the experimental data across the entire phase diagram.
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ورودعنوان ژورنال:
- Physical review letters
دوره 101 24 شماره
صفحات -
تاریخ انتشار 2008