Tuning a random field mechanism in a frustrated magnet
Abstract
We study the influence of spinless impurities on a frustrated magnet featuring a spin-density wave (stripe) phase by means of Monte Carlo simulations. We demonstrate that the interplay between the impurities and an order parameter that breaks a real-space symmetry triggers the emergence of a random-field mechanism which destroys the stripe-ordered phase. Importantly, the strength of the emerging random fields can be tuned by the repulsion between the impurity atoms; they vanish for perfect anticorrelations between neighboring impurities. This provides a novel way of controlling the phase diagram of a many-particle system. In addition, we also investigate the effects of the impurities on the character of the phase transitions between the stripe-ordered, ferromagnetic, and paramagnetic phases.
Keywords
Cite
@article{arxiv.1803.05597,
title = {Tuning a random field mechanism in a frustrated magnet},
author = {Shashikant Singh Kunwar and Arnab Sen and Thomas Vojta and Rajesh Narayanan},
journal= {arXiv preprint arXiv:1803.05597},
year = {2018}
}
Comments
5 + epsilon pages + 5 pages supplemental material