15 citations · 53 across the 6 of their papers we have counts for
6 papers
Effectof biquadratic exchange on the phase diagram of a spin-1 transverse XY modelwith single-ion anisotropy
I. Rabuffo, L. De Cesare, A. Caramico D'Auria +1
The two-time Green function method is employed to explore the effect of the biquadratic exchange interaction on the phase diagram of a -dimensional spin-1 transverse XY model wi…
Unified static renormalization-group treatment of finite-temperature crossovers close to a quantum critical point
M. T. Mercaldo, L. De Cesare, I. Rabuffo +1
A nonconventional renormalization-group (RG) treatment close to and below four dimensions is used to explore, in a unified and systematic way, the low-temperature properties of a w…
Field-Induced Quantum Criticality of Systems with Ferromagnetically Coupled Structural Spin Units
I. Rabuffo, M. T. Mercaldo, L. De Cesare +1
The field-induced quantum criticality of compounds with ferromagnetically coupled structural spin units (as dimers and ladders) is explored by applying Wilson's renormalization gro…
The Classical Spectral Density Method at Work: The Heisenberg Ferromagnet
A. Cavallo, F. Cosenza, L. De Cesare
In this article we review a less known unperturbative and powerful many-body method in the framework of classical statistical mechanics and then we show how it works by means of ex…
Critical behaviour of thin films with quenched impurities
L. Craco, L. De Cesare, I. Rabuffo +2
The critical behaviour of thin films containing quenched random impurities and inhomogeneities is investigated by the renormalization-group method. The finite-size crossover in imp…
Low-Temperature Quantum Critical Behaviour of Systems with Transverse Ising-like Intrinsic Dynamics
A. Caramico D'Auria, L. De Cesare, I. Rabuffo
The low-temperature properties and crossover phenomena of -dimensional transverse Ising-like systems within the influence domain of the quantum critical point are investigated s…