Novel order parameter to describe the critical behavior of Ising spin glass models

F. ROMÁ; A. J. RAMIREZ-PASTOR; F. NIETO; E. E. VOGEL

PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS

Año: 2006 vol. 363 p. 327 - 333

0378-4371

A novel order parameter F for spin glasses is defined based on topological criteria and with a clear physical interpretation. F is first investigated for well known magnetic systems and then applied to the Edwards–Anderson JF for spin glasses is defined based on topological criteria and with a clear physical interpretation. F is first investigated for well known magnetic systems and then applied to the Edwards–Anderson JF is first investigated for well known magnetic systems and then applied to the Edwards–Anderson J model on a square lattice, comparing its properties with the usual q order parameter. Finite size scaling procedures are performed. Results and analyses based on F confirm a zero temperature phase transition and allow to identify the low temperature phase. The advantages of F are brought out and its physical meaning is established.q order parameter. Finite size scaling procedures are performed. Results and analyses based on F confirm a zero temperature phase transition and allow to identify the low temperature phase. The advantages of F are brought out and its physical meaning is established.F confirm a zero temperature phase transition and allow to identify the low temperature phase. The advantages of F are brought out and its physical meaning is established.F are brought out and its physical meaning is established.