Tuning the Disorder in Superglasses
Journal
Physical Review Letters
Journal Volume
109
Journal Issue
15
Date Issued
2012
Author(s)
Larson, D.
URI
Abstract
We study the interplay of superfluidity, glassy, and magnetic orders in the XXZ model with random Ising interactions on a three dimensional cubic lattice. In the classical limit, this model reduces to a ±J Edwards-Anderson Ising model with concentration p of ferromagnetic bonds, which hosts a glassy-ferromagnetic transition at a critical concentration pccl∼0.77. Our quantum Monte Carlo simulation results show that quantum fluctuations stabilize the coexistence of superfluidity and glassy order (superglass), and shift the (super)glassy-ferromagnetic transition to p c>pccl. In contrast, antiferromagnetic order coexists with superfluidity to form a supersolid, and the transition to the glassy phase occurs at a higher p. © 2012 American Physical Society.
Other Subjects
Antiferromagnetic orders; Classical limits; Critical concentration; Cubic lattice; Glassy phase; Magnetic orders; Quantum fluctuation; Quantum Monte Carlo simulations; Supersolids; Antiferromagnetism; Ferromagnetic materials; Ferromagnetism; Ising model; Monte Carlo methods; Quantum electronics; Three dimensional
Type
journal article