Frustrating quantum spin ice: a tale of three spin liquids and hidden order
APA
Shannon, N. (2017). Frustrating quantum spin ice: a tale of three spin liquids and hidden order. Perimeter Institute. https://pirsa.org/17060054
MLA
Shannon, Nicholas. Frustrating quantum spin ice: a tale of three spin liquids and hidden order. Perimeter Institute, Jun. 08, 2017, https://pirsa.org/17060054
BibTex
@misc{ pirsa_PIRSA:17060054, doi = {10.48660/17060054}, url = {https://pirsa.org/17060054}, author = {Shannon, Nicholas}, keywords = {Condensed Matter}, language = {en}, title = {Frustrating quantum spin ice: a tale of three spin liquids and hidden order}, publisher = {Perimeter Institute}, year = {2017}, month = {jun}, note = {PIRSA:17060054 see, \url{https://pirsa.org}} }
Okinawa Institute of Science and Technology Graduate University
Collection
Talk Type
Subject
Abstract
"Quantum spin ice" materials have been widely discussed in terms of an XXZ model on a pyrochlore lattice, which is accessible to quantum Monte Carlo simulation for unfrustrated interactions J_\pm > 0. Here we argue that the properties of this model may become even more interesting once it is "frustrated". Using a combination of large-scale classical Monte Carlo simulation, semi-classical molecular dynamics, symmetry analysis and analytic field theory we explore the new phases which arise for J_\pm < 0. We find that the model supports not one, but three distinct forms of spin liquid: spin ice, a U(1) spin liquid; a disguised version of the U(1) x U(1) x U(1) spin-liquid found in the Heisenberg antiferromagnet on a pyrochlore lattice; and another entirely new form of spin liquid described by a U(1) x U(1) gauge group. At low temperatures this novel spin liquid undergoes a thermodynamic phase transition into a ground state with hidden, spin-nematic order. We present explicit predictions for inelastic neutron scattering experiments carried out on the three different spin liquids [M. Taillefumier et al., arXiv:1705.00148].