Issue |
Europhys. Lett.
Volume 65, Number 2, January 2004
|
|
---|---|---|
Page(s) | 256 - 261 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2003-10080-8 | |
Published online | 01 January 2004 |
Phase coexistence and relaxation of the spherical frustrated Blume-Emery-Griffiths model with attractive particles coupling
Dipartimento di Scienze Fisiche, INFM, Unità di Napoli Monte Sant'Angelo, I-80126 Napoli, Italy
Received:
23
September
2003
Accepted:
18
November
2003
We study the equilibrium and dynamical properties of a spherical
version of the frustrated Blume-Emery-Griffiths model at
mean-field level for attractive particle-particle coupling
(). Beyond a second-order transition line from a
paramagnetic to a (replica symmetric) spin glass phase, the
density-temperature phase diagram is characterized by a
tricritical point from which, interestingly, a first-order
transition line starts with coexistence of the two phases. In the
Langevin dynamics the paramagnetic/spin glass discontinuous
transition line is found to be dependent on the initial density;
close to this line, on the paramagnetic side, the
correlation-response plot displays interrupted aging.
PACS: 75.10.Nr – Spin-glass and other random models / 05.50.+q – Lattice theory and statistics (Ising, Potts, etc.) / 64.60.Ht – Dynamic critical phenomena
© EDP Sciences, 2004
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