期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.247202
关键词
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资金
- Royal Society, EPSRC
- Wolfson Foundation
- Triangle de la Physique
- Swiss National Science Foundation
- French National Council (ANR)
- Engineering and Physical Sciences Research Council [EP/F032293/1] Funding Source: researchfish
- EPSRC [EP/F032293/1] Funding Source: UKRI
The phase diagram in temperature and magnetic field of the metal-organic, two-leg, spin-ladder compound (C(5)H(12)N)(2)CuBr(4) 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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