Search Results - "Gingras, Michel J. P"
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Quantum and Classical Phases of the Pyrochlore Heisenberg Model with Competing Interactions
Published in Physical review. X (01-01-2019)“…We investigate the quantum Heisenberg model on the pyrochlore lattice for a generic spinSin the presence of nearest-neighborJ1and…”
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Spin Ice State in Frustrated Magnetic Pyrochlore Materials
Published in Science (American Association for the Advancement of Science) (16-11-2001)“…A frustrated system is one whose symmetry precludes the possibility that every pairwise interaction ("bond") in the system can be satisfied at the same time…”
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Spin-Ice Thin Films: Large- N Theory and Monte Carlo Simulations
Published in Physical review. X (01-05-2018)“…We explore the physics of highly frustrated magnets in confined geometries, focusing on the Coulomb phase of pyrochlore spin ices. As a specific example, we…”
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Pseudo-Goldstone Modes and Dynamical Gap Generation from Order by Thermal Disorder
Published in Physical review letters (30-06-2023)“…Accidental ground state degeneracies-those not a consequence of global symmetries of the Hamiltonian-are inevitably lifted by fluctuations, often leading to…”
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Spin slush in an extended spin ice model
Published in Nature communications (29-07-2016)“…We present a new classical spin liquid on the pyrochlore lattice by extending spin ice with further neighbour interactions. We find that this disorder-free…”
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Finite-temperature transitions in dipolar spin ice in a large magnetic field
Published in Physical review letters (26-08-2005)“…We use Monte Carlo simulations to identify the mechanism that allows for phase transitions in dipolar spin ice to occur and survive for an applied magnetic…”
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Fluctuation-driven selection at criticality in a frustrated magnetic system: the case of multiple-k partial order on the pyrochlore lattice
Published in Physical review letters (03-04-2015)“…We study the problem of partially ordered phases with periodically arranged disordered (paramagnetic) sites on the pyrochlore lattice, a network of…”
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Nematicity in stripe-ordered cuprates probed via resonant x-ray scattering
Published in Science (American Association for the Advancement of Science) (05-02-2016)“…In underdoped cuprate superconductors, a rich competition occurs between superconductivity and charge density wave (CDW) order. Whether rotational…”
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Breathing chromium spinels: a showcase for a variety of pyrochlore Heisenberg Hamiltonians
Published in npj quantum materials (18-12-2019)“…We address the long-standing problem of the microscopic origin of the richly diverse phenomena in the chromium breathing pyrochlore material family. Combining…”
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Effects of lithium isotopes on sodium/lithium co-transport and calcium efflux through the sodium/calcium/lithium exchanger in mitochondria
Published in Frontiers in physiology (09-04-2024)“…The effects of lithium (Li) isotopes and their impact on biological processes have recently gained increased attention due to the significance of Li as a…”
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Lithium isotopes differentially modify mitochondrial amorphous calcium phosphate cluster size distribution and calcium capacity
Published in Frontiers in physiology (15-09-2023)“…Lithium is commonly prescribed as a mood stabilizer in a variety of mental health conditions, yet its molecular mode of action is incompletely understood. Many…”
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Towards understanding the magnetic properties of the breathing pyrochlore compound Ba3Yb2Zn5O11through single-crystal studies
Published in npj quantum materials (10-08-2022)“…Ba 3 Yb 2 Zn 5 O 11 is exceptional among breathing pyrochlore compounds for being in the nearly-decoupled limit where inter-tetrahedron interactions are weak,…”
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Magnitude of quantum effects in classical spin ices
Published in Physical review. B, Condensed matter and materials physics (19-10-2015)Get full text
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14
Competing gauge fields and entropically driven spin liquid to spin liquid transition in non-Kramers pyrochlores
Published in Proceedings of the National Academy of Sciences - PNAS (03-09-2024)“…Gauge theories are powerful theoretical physics tools that allow complex phenomena to be reduced to simple principles and are used in both high-energy and…”
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Dynamically induced frustration as a route to a quantum spin ice state in Tb2Ti2O7 via virtual crystal field excitations and quantum many-body effects
Published in Physical review letters (13-04-2007)“…The Tb2Ti2O7 pyrochlore magnetic material is attracting much attention for its spin liquid state, failing to develop long-range order down to 50 mK despite a…”
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Order-by-disorder near criticality in XY pyrochlore magnets
Published in Physical review. B, Condensed matter and materials physics (20-05-2015)“…We consider a system of spins on the sites of a three-dimensional pyrochlore lattice of corner-sharing tetrahedra interacting with a predominant effective xy…”
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Dy2Ti2O7 spin ice: a test case for emergent clusters in a frustrated magnet
Published in Physical review letters (18-07-2008)“…Dy2Ti2O7 is a geometrically frustrated magnetic material with a strongly correlated spin ice regime that extends from 1 K down to as low as 60 mK. The diffuse…”
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Rods of neutron scattering intensity in Yb2Ti2O7: compelling evidence for significant anisotropic exchange in a magnetic pyrochlore oxide
Published in Physical review letters (06-05-2011)“…Paramagnetic correlations in the magnetic material Yb(2)Ti(2)O(7) have been investigated via neutron scattering, revealing a [111] rod of scattering intensity…”
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Observing Monopoles in a Magnetic Analog of Ice
Published in Science (American Association for the Advancement of Science) (16-10-2009)“…Experimental evidence has been found that magnetic poles within metal oxide magnets can be separated. A bar magnet has a north and south pole, and cutting it…”
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Pinch-points to half-moons and up in the stars: The kagome skymap
Published in Physical review research (01-02-2023)“…Pinch point singularities, associated with flat band magnetic excitations, are tell-tale signatures of Coulomb spin liquids. While their properties in the…”
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