2008/02/19 by M. Tarzia, G. Biroli · 42 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Frustration #Generalized valence bond #Lattice (music) #Modern valence bond theory #Phase diagram #Physics of Superconductivity and Magnetism #Spin glass #Theoretical and Computational Physics #Valence (chemistry) #Valence bond theory #cond-mat.dis-nn #cond-mat.str-el
paper · pdf · doi:10.1209/0295-5075/82/67008
published in Europhysics Letters (EPL) 82(6), 67008 (Institute of Physics)
arxiv created 2008/02/19 · openalex publication_date 2008/06/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that a new glassy phase can emerge in the presence of strong magnetic frustration and quantum fluctuations. It is a valence bond glass (VBG). We study its properties solving the Hubbard-Heisenberg model on a Bethe lattice within the large- N limit introduced by Affleck and Marston. We work out the phase diagram that contains Fermi liquid, dimer and valence bond glass phases. This new glassy phase has no electronic or spin gap (although a pseudo-gap is observed), it is characterized by long-range critical valence bond correlations and is not related to any magnetic ordering. As a consequence, it is quite different from both valence bond crystals and spin glasses.