We investigate the role played by symmetry conserving quenched disorder on quantum criticality of a variety of d-dimensional systems with a continuous symmetry order parameter.We employ a non standard procedure which combines a preliminary reduction to an effective classical problem and a successive renormalization group treatment. We find a quantum critical point scenario exhibiting unusual features, which remind us of some predictions of the quantum Griffiths phase model
Disorder-induced quantum-Griffiths-like features from a non-conventional renormalization group analysis near four dimensions / I., Rabuffo; M. T., Mercaldo; CARAMICO D'AURIA, Alvaro; L., DE CESARE. - In: PHYSICA. A. - ISSN 0378-4371. - STAMPA. - 388:(2009), pp. 4523-4534. [10.1016/j.physa.2009.07.033]
Disorder-induced quantum-Griffiths-like features from a non-conventional renormalization group analysis near four dimensions.
CARAMICO D'AURIA, ALVARO;
2009
Abstract
We investigate the role played by symmetry conserving quenched disorder on quantum criticality of a variety of d-dimensional systems with a continuous symmetry order parameter.We employ a non standard procedure which combines a preliminary reduction to an effective classical problem and a successive renormalization group treatment. We find a quantum critical point scenario exhibiting unusual features, which remind us of some predictions of the quantum Griffiths phase modelI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.