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Fracton Spin Liquid and Exotic Frustrated Phases in Ising-like Octochlore Magnets
Matthew Stern, Michael D. Burke, Michel J. P. Gingras +2
For nearly three decades, research on frustrated magnetism in three dimensions (3D) has centered on the pyrochlore lattice of corner-sharing tetrahedra and the classical spin liqui…
Finite-Size Spectral Signatures of Order by Quantum Disorder: A Perspective from Anderson's Tower of States
Subhankar Khatua, Griffin C. Howson, Michel J. P. Gingras +1
In frustrated magnetic systems with a subextensive number of classical ground states, quantum zero-point fluctuations can select a unique long-range ordered state, a celebrated phe…
Anharmonic Collective Oscillations in Isotropic Spin Systems and their Spectroscopic Signatures
Anna Fancelli, Matías G. Gonzalez, Subhankar Khatua +4
Spin waves are the fundamental excitations in magnetically ordered spin systems and are ubiquitously observed in magnetic materials. However, the standard understanding of spin wav…
Universal temperature-dependent power law excitation gaps in frustrated quantum spin systems harboring order-by-disorder
Alexander Hickey, Jeffrey G. Rau, Subhankar Khatua +1
When magnetic moments are subject to competing or frustrated interactions, continuous degeneracies that are not protected by any symmetry of the parent Hamiltonian can emerge at th…
An Atlas of Classical Pyrochlore Spin Liquids
Daniel Lozano-Gómez, Owen Benton, Michel J. P. Gingras +1
Frustrated magnetism in the pyrochlore lattice magnet has proven to be a most fruitful setting for the experimental and theoretical search for spin liquids. Besides the canonical c…
Synthesis and characterization of the novel breathing pyrochlore compound Ba3Tm2Zn5O11
Lalit Yadav, Rabindranath Bag, Ramesh Dhakal +10
In this study, a novel material from the rare-earth based breathing pyrochlore family, Ba3Tm2Zn5O11, was successfully synthesized. Powder x-ray diffraction and high-resolution powd…
Order-by-disorder without quantum zero-point fluctuations in the pyrochlore Heisenberg ferromagnet with Dzyaloshinskii-Moriya interactions
Alexander Hickey, Daniel Lozano-Gómez, Michel J. P. Gingras
Order-by-disorder, whereby fluctuations lift an accidental classical ground state degeneracy to stabilize a subset of ordered states, is a recurrent and prominent theme in the fiel…
2-Form U(1) Spin Liquids: Classical Model and Quantum Aspects
Kristian Tyn Kai Chung, Michel J. P. Gingras
We introduce a novel geometrically frustrated classical Ising model, dubbed the "spin vorticity model", whose ground state manifold is a novel classical spin liquid, a "2-form Coul…
Competing Gauge Fields and Entropically-Driven Spin Liquid to Spin Liquid Transition in non-Kramers Pyrochlores
Daniel Lozano-Gómez, Vincent Noculak, Jaan Oitmaa +4
Gauge theories are powerful tools in theoretical physics, allowing complex phenomena to be reduced to simple principles, and are used in both high-energy and condensed matter physi…
Anisotropic exchange within decoupled tetrahedra in the quantum breathing pyrochlore Ba3Yb2Zn5O11
J. G. Rau, L. S. Wu, A. F. May +9
The low energy spin excitation spectrum of the breathing pyrochlore Ba3Yb2Zn5O11 has been investigated with inelastic neutron scattering. Several nearly resolution limited modes wi…
Are multiphase competition & order-by-disorder the keys to understanding Yb2Ti2O7?
L. D. C. Jaubert, Owen Benton, Jeffrey G. Rau +4
If magnetic frustration is most commonly known for undermining long-range order, as famously illustrated by spin liquids, the ability of matter to develop new collective mechanisms…
Order by Disorder and Energetic Selection of the Ground State in the XY Pyrochlore Antiferromagnet Er2Ti2O7. An Inelastic Neutron Scattering Study
S. Petit, J. Robert, S. Guitteny +6
Examples of materials where an "order by disorder" mechanism is at play to select a particular ground state are scarce. It has recently been proposed, however, that the antiferroma…
Bosonic Many-body Theory of Quantum Spin Ice
Zhihao Hao, Alexandre G. R. Day, M. J. P. Gingras
We carry out an analytical study of quantum spin ice, a U quantum spin liquid close to the classical spin ice solution for an effective spin model with anisotropic excha…
Reply to Comment on "Spin Ice: Magnetic Excitations without Monopole Signatures using Muon Spin Rotation"
S. R. Dunsiger, A. A. Aczel, C. Arguello +13
We respond to the comment of Bramwell et al (arXiv:1111.4168v1) to our original publication (S. R. Dunsiger et al, Phys. Rev. Lett. 107, 207207 (2011)), detailing muon spin rotatio…
Is the Yb2Ti2O7 pyrochlore a quantum spin ice?
R. Applegate, N. R. Hayre, R. R. P. Singh +3
We use numerical linked cluster (NLC) expansions to compute the specific heat, C(T), and entropy, S(T), of a quantum spin ice model of Yb2Ti2O7 using anisotropic exchange interacti…
Spin Ice: Magnetic Excitations without Monopole Signatures using Muon Spin Rotation
S. R. Dunsiger, A. A. Aczel, C. Arguello +13
Theory predicts the low-temperature magnetic excitations in spin ices consist of deconfined magnetic charges, or monopoles. A recent transverse-field (TF) muon spin rotation (muSR)…
Neel order, ring exchange and charge fluctuations in the half-filled Hubbard model
J. -Y. P. Delannoy, M. J. P. Gingras, P. C. W. Holdsworth +1
We investigate the ground state properties of the two dimensional half-filled one band Hubbard model in the strong (large-U) to intermediate coupling limit ({\it i.e.} away from th…