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Browsing University of Waterloo by Supervisor "Gingras, Michel"
Now showing items 1-10 of 10
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Confined Quantum Molecular Degrees of Freedom
(University of Waterloo, 2017-09-22)Motivated by recent experimental measurements of the degeneracy lifting of the rotational ground state of molecular ortho-H2 con ned inside the fullerene cage C60 and, more generally, motivated by the physics of con ned ... -
Emergent Fields, Flat Bands and Phase Competition: A Study in Magnetic Pyrochlore Systems
(University of Waterloo, 2020-09-18)We investigate spins models on the pyrochlore and the breathing pyrochlore lattice. Specifically, we study polarized neutron scattering in classical spin ice modelled via Ising spins with anti-ferromagnetic interactions. ... -
Hodge Theory for Geometrically Frustrated Magnetism
(University of Waterloo, 2022-09-29)We present an analytical formalism based on the concept of discrete differential forms and Hodge theory as a framework for understanding geometrically frustrated magnetism. The primary insight is to treat spins as a 1-form ... -
Magnetic Ordering of Dipolar Spin Ice in Moderate [111] Field
(University of Waterloo, 2016-09-08)This thesis explores the low temperature physics of the macroscopically degenerate system of dipolar spin ice in moderate fields applied along the [111] cubic axis. While most applications of field generically lift the ... -
Mean-Field Theory of Collective Behavior of Quantum Dipolar Rotors
(University of Waterloo, 2021-02-08)Motivated by the recent experimental measurements of the dielectric property of confined quantum dipolar molecules, the orientational dipolar ordering transition is investigated in the quantum generalization of the quantum ... -
Octupolar Ordering in the b>0 Bilinear-Biquadratic Heisenberg Pyrochlore
(University of Waterloo, 2019-01-25)We investigate the bilinear-biquadratic Heisenberg model on the pyrochlore lattice. While negative biquadratic couplings result in a first-order transition into a nematic ordered state with spins aligned mutually ... -
Spin-Spin Correlations in the CuAlCr₄S₈ Breathing Pyrochlore
(University of Waterloo, 2023-09-21)Frustrated magnetic systems, whose behaviour is influenced by competing interactions between magnetic spins, have been an active area of research. There is a special class of materials called breathing pyrochlores, whose ... -
Studies of Reentrance in Pyrochlore Magnets and Machine Learning of Quenched Gauge Symmetries
(University of Waterloo, 2020-09-18)In this thesis, we present two explorations: (1) understanding the mechanism causing reentrant behavior in the rare-earth pyrochlore magnet Er2Sn2O7, and (2) determining if unsupervised machine learning is capable of ... -
Symmetry Breaking, Order-by-Disorder, Fragmentation, and Spin-Liquids in the Magnetic Pyrochlore Lattice with Anisotropic Interactions
(University of Waterloo, 2023-01-26)Within the study of frustrated magnetism, the pyrochlore lattice is deemed a fruitful ground where phenomena such as quantum and thermal order-by-disorder, moment fragmentation, and spin-liquids, both quantum and classical, ... -
Topological aspects of nodal-loop semimetals and the nature of spin-orbit coupling in Lu₂V₂O₇
(University of Waterloo, 2021-09-27)This thesis is presented in two parts: (I) understanding the topological aspects of nodal-loop semimetals in the presence of interactions and (II) exploring the nature of spin-orbit coupling in the pyrochlore oxide Lu₂V₂O₇. ...