Zero-temperature responses of a 3D spin glass in a magnetic field

Florent Krzakala ¹, Jérôme Houdayer ², Enzo Marinari ³, Olivier C. Martin ¹, Giorgio Parisi ³

Physical Review Letters 87 (2001) 197204

We probe the energy landscape of the 3D Edwards-Anderson spin glass in a magnetic field to test for a spin glass ordering. We find that the spin glass susceptibility is anomalously large on the lattice sizes we can reach. Our data suggest that a transition from the spin glass to the paramagnetic phase takes place at B_c=0.65, though the possibility B_c=0 cannot be excluded. We also discuss the question of the nature of the putative frozen phase.

• 1. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
  CNRS : UMR8626 – Université Paris XI – Paris Sud
• 2. Institut für Physik, and Max Planck Institut für Polymerforschung,
  Max-Planck-Institut
• 3. Dipartimento di Fisica, INFM, SMC, and INFN,
  Università degli studi di Roma I – La Sapienza