Year: 2008
Type: article
Abstract: 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.
Source: Physical Review Letters
Institutions: London Centre for Nanotechnology, University College London, Helmholtz-Zentrum Berlin für Materialien und Energie, Paul Scherrer Institute, ETH Zurich, Los Alamos National Laboratory, École Polytechnique Fédérale de Lausanne, University of Geneva, Centre National de la Recherche Scientifique, École Polytechnique, Centre de Physique Théorique, Université Toulouse III - Paul Sabatier, Laboratoire de Physique Théorique, Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes, Université de Toulouse, University of Bern
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2065120148