Search Results - "D’Auria, A. Caramico"

Effect of biquadratic exchange on the phase diagram of a spin-1 transverse XY model with single-ion anisotropy by Rabuffo, I., De Cesare, L., Caramico D’Auria, A., Mercaldo, M.T.

“…•Biquadratic exchange and Single Ion Anisotropy at work.•The emergency of a reentrance in the phase diagram.•Anderson-Callen decoupling for the anisotropic…”
Get full text

Reentrant behaviors in the phase diagram of spin-1 planar ferromagnets with easy-axis single-ion anisotropy via the Devlin two-time Green function framework by Mercaldo, M.T., Rabuffo, I., De Cesare, L., Caramico D’Auria, A.

“…•We consider a S = 1 planar ferromagnets that show a magnetic-field-induced quantum phase transition.•We study the role played by the easy-axis single-ion…”
Get full text

Reentrant behaviors in the phase diagram of spin-1 planar ferromagnet with single-ion anisotropy by Rabuffo, I., De Cesare, L., Caramico D'Auria, A., Mercaldo, M.T.

“…We used the two-time Green function framework to investigate the role played by the easy-axis single-ion anisotropy on the phase diagram of (d>2)-dimensional…”
Get full text

Quantum critical scenario in a three-dimensional XY model with an easy-plane single-ion anisotropy via a renormalization group analysis by Rabuffo, I., Caramico D'Auria, A., De Cesare, L., Mercaldo, M.T.

“…The low-temperature critical properties of the three-dimensional spin-1 XY model with an easy-plane single-ion anisotropy in zero magnetic field are explored…”
Get full text

Magnetic-field-induced quantum criticality in a spin-S planar ferromagnet with single-ion anisotropy by Mercaldo, M. T., Rabuffo, I., De Cesare, L., Caramico D’Auria, A.

“…The effects of single-ion anisotropy on quantum criticality in a d -dimensional spin- S planar ferromagnet is explored by means of the two-time Green’s…”
Get full text

Quantum criticality of d-dimensional n-vector transverse Ising-like models: New renormalization group features for d≤3 by Caramico D’Auria, A., De Cesare, L., Mercaldo, M.T., Naddeo, A., Rabuffo, I.

“…We revisit quantum criticality of d-dimensional n-vector transverse Ising-like models by means of a conventional one-loop renormalization group (RG) approach…”
Get full text

Quantum tricriticality in transverse Ising-like systems by Mercaldo, M. T., Rabuffo, I., Naddeo, A., Caramico D’Auria, A., De Cesare, L.

“…The quantum tricriticality of d -dimensional transverse Ising-like systems is studied by means of a perturbative renormalization group approach focusing on…”
Get full text

Low-temperature critical properties and crossovers of a spin- 1 2 planar ferromagnet in 4 − ε dimensions by Mercaldo, M. T., Caramico D’Auria, A., De Cesare, L., Rabuffo, I.

Get full text

Unified static renormalization-group treatment of finite-temperature crossovers close to a quantum critical point by Mercaldo, M. T., De Cesare, L., Rabuffo, I., Caramico D’Auria, A.

Get full text

Scaling functions for classical to quantum crossover in the transverse Ising model via an effective Wilsonian renormalization group approach in 4 – ε dimensions by De Cesare, L., Caramico D’Auria, A., Rabuffo, I., Mercaldo, M. T.

“…The classical to quantum crossover, which occurs in d-dimensional transverse field Ising model-like systems decreasing the temperature to zero in the influence…”
Get full text

Quantum-like criticality for a classical transverse Ising model in 4–ε dimensions by Caramico D’Auria, A., De Cesare, L., Mercaldo, M. T., Rabuffo, I.

“… We investigate the low-temperature critical properties of a classical Ising model in a transverse field. This is performed by applying the conventional…”
Get full text

Reentrant phenomena in a three-dimensional spin-1 planar ferromagnet with easy-axis single-ion anisotropy by Mercaldo, M.T., Rabuffo, I., De Cesare, L., Caramico D׳Auria, A.

“…The two-time Green function method is employed to explore the phase diagram and the magnetic-field-induced quantum criticality of a three-dimensional spin-one…”
Get full text

Disorder-induced quantum-Griffiths-like features from a non-conventional renormalization group analysis near four dimensions by Rabuffo, I., Mercaldo, M.T., Caramico D’Auria, A., De Cesare, L.

“…We investigate the role played by symmetry conserving quenched disorder on quantum criticality of a variety of d-dimensional systems with a continuous symmetry…”
Get full text

Single-ion anisotropy effects on the energy spectra of spin S = 1 Heisenberg ring by Kamieniarz, G., Haglauer, M., Musial, G., Caramico D’Auria, A., Esposito, F., Gatteschi, D.

“…Dodecanuclear nickel cluster Ni 12. The numerical exact diagonalization technique is applied to the Heisenberg spin Hamiltonian with single-ion anisotropy,…”
Get full text

Quantum criticality of a spin-1 XY model with easy-plane single-ion anisotropy via a two-time Green function approach avoiding the Anderson–Callen decoupling by Mercaldo, M.T., Rabuffo, I., De Cesare, L., Caramico D'Auria, A.

“…In this work we study the quantum phase transition, the phase diagram and the quantum criticality induced by the easy-plane single-ion anisotropy in a…”
Get full text

Large-scale simulations of the finite-temperature properties of the molecular assemblies Mn6 and Ni12 by KAMIENIARZ, G, MATYSIAK, R, CARAMICO D'AURIA, A, ESPOSITO, F, BENELLI, C

Get full text

Field-induced quantum criticality of systems with ferromagnetically coupled structural spin units by Rabuffo, I., Mercaldo, M.T., De Cesare, L., Caramico D'Auria, A.

“…The field-induced quantum criticality of compounds with ferromagnetically coupled structural spin units (as dimers and ladders) is explored by applying…”
Get full text

Phenomenological modeling of molecular-based rings beyond the strong exchange limit: Bond alternation and single-ion anisotropy effects by Kamieniarz, G., Kozłowski, P., Musiał, G., Florek, W., Antkowiak, M., Haglauer, M., D’Auria, A. Caramico, Esposito, F.

“…Performing non-perturbative calculations we determined a dense structure of energy levels for a dozen antiferromagnetically-coupled s = 1 spins with the…”
Get full text

A non-conventional approach to study the quenched impurity effects on quantum criticality by Caramico D'Auria, A., De Cesare, L., Mercaldo, M.T., Rabuffo, I.

“…A non-conventional point of view is used to explore the still unclear role played by the competition between quenched disorder and quantum fluctuations in…”
Get full text

Quantum criticality of a planar Heisenberg ferromagnet in a transverse magnetic field by Caramico D’Auria, A., De Cesare, L., Mercaldo, M.T., Rabuffo, I.

“…A one-loop renormalization group treatment is used to investigate the quantum phase transition and the low-temperature critical properties of a planar…”
Get full text