Critical properties and Bose Einstein Condensation in dimer spin systems

Edmond Orignac (1) , Roberta Citro (2) , Thierry Giamarchi (3)

1 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
2 Dipartamento di Fisica "E. R. Caianiello"
3 Departement de Physique de la Matiere Condensee Section de Physique

We analyze the spin relaxation time 1/T_1 for a system made of weakly coupled one dimensional ladders.This system allows to probe the dimensional crossover between a Luttinger liquid and a Bose-Einstein condensateof magnons. We obtain the temperature dependence of 1/T_1 in the various dimensional regimes, and discuss the experimental consequences.

Keywords: Bose-Einstein Condensation; Nuclear Magnetic Resonance; spin gap; field induced magnetic ordering

Domains: Physics [physics]; Condensed Matter [cond-mat]; Strongly Correlated Electrons [cond-mat.str-el]

Edmond Orignac, Roberta Citro, Thierry Giamarchi. Critical properties and Bose Einstein Condensation in dimer spin systems. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2007, 75 (14), pp.140403. ⟨10.1103/PhysRevB.75.140403⟩. ⟨ensl-00142911⟩