Regensburg 2016 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 27: Poster - Statistical Physics, Critical Phenomena, Brownian motion

DY 27.6: Poster

Dienstag, 8. März 2016, 18:15–21:00, Poster C

Spin glasses with variable frustration — •Ravinder Kumar^1,2, Martin Weigel¹, and Wolfhard Janke² — ¹Applied Mathematics Research Centre, Coventry University, Coventry, UK. — ²Institut für Theoretische Physik, Leipzig University, Leipzig, Germany.

Together with randomness, frustration is believed to be a crucial prerequisite for the occurrence of glassy behavior in spin systems. The degree of frustration is normally the result of a chosen distribution of exchange couplings in combination with the structure of the lattice under consideration. Here, however, we discuss a process for tuning the frustration content of the Edwards-Anderson model on arbitrary lattices. With the help of extensive parallel-tempering Monte Carlo simulations we study such systems on the square lattice and compare the outcomes to the predictions of a recent study employing the Migdal-Kadanoff real-space renormalization procedure [1].

• [1] Efe Ilker and A. Nihat Berker, Phys. Rev. E 89, 042139 (2014).