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.

5 + epsilon pages + 5 pages supplemental material

References in corpus (12)

• Theory of Intertwined Orders in High Temperature Superconductors
• Evidence for deconfined quantum criticality in a two-dimensional Heisenberg model with four-spin interactions
• Rare region effects at classical, quantum, and non-equilibrium phase transitions
• Plaquette valence bond solid in the frustrated Heisenberg quantum antiferromagnet on the square lattice
• Phase diagram of the Ising square lattice with competing interactions
• Location of the Potts-critical end point in the frustrated Ising model on the square lattice
• Cluster-glass phase in pyrochlore XY antiferromagnets with quenched disorder
• Protecting clean critical points by local disorder correlations
• Emerging criticality in the disordered three-color Ashkin-Teller model
• Nematic phase in the J${}_1$-J${}_2$ square lattice Ising model in an external field
• Phase Diagram of the Two-Dimensional Ising Model with Random Competing Interactions
• Wang-Landau study of the random bond square Ising model with nearest- and next-nearest-neighbor interactions

Cited by in corpus (7)

• Disorder in quantum many-body systems
• The phase diagram of a frustrated Heisenberg model: from disorder to order and back again
• Antiferromagnetism beyond classical percolation threshold in the site-diluted half-filled one-band Hubbard model in three dimensions
• Random-strain-induced correlations in materials with intertwined nematic and magnetic orders
• Stripe order, impurities, and symmetry breaking in a diluted frustrated magnet
• Chiral order emergence driven by quenched disorder
• Stripe order in quasicrystals