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Thermodynamics of the Spin Luttinger Liquid in a Model Ladder Material

Ruegg, C; Kiefer, K; Thielemann, B; McMorrow, DF; Zapf, V; Normand, B; Zvonarev, MB; ... Kramer, KW; + view all (2008) Thermodynamics of the Spin Luttinger Liquid in a Model Ladder Material. PHYS REV LETT , 101 (24) , Article 247202. 10.1103/PhysRevLett.101.247202. Green open access

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Abstract

The phase diagram in temperature and magnetic field of the metal-organic, two-leg, spin-ladder compound (C5H12N)(2)CuBr4 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.

Type: Article
Title: Thermodynamics of the Spin Luttinger Liquid in a Model Ladder Material
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.101.247202
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.101.247202
Language: English
Additional information: © 2008 The American Physical Society
Keywords: BOSE-EINSTEIN CONDENSATION, MAGNETIC-FIELD, HEISENBERG LADDER, SYSTEM, CHAIN
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/168494
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