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2023 CAP Congress / Congrès de l'ACP 2023

18–23 Jun 2023
University of New Brunswick
America/Halifax timezone
Welcome to the 2023 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2023!

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Session

(DCMMP) M1-7 Quantum Magnetism | Magnétisme quantique (DPMCM)

M1-7
19 Jun 2023, 10:45
University of New Brunswick

University of New Brunswick

Conveners

(DCMMP) M1-7 Quantum Magnetism | Magnétisme quantique (DPMCM)

  • Robert Wickham

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  1. 3578. (I) Soft X-Ray Scattering of Magnetic Skyrmions in Helimagnetic Lamella
    Murray Wilson (Memorial University of Newfoundland)
    19/06/2023, 10:45
    Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)
    Invited Speaker / Conférencier(ère) invité(e)

    Skyrmions are a topologically non-trivial magnetic state that has been observed in several different magnetic materials, such as the chiral cubic magnets Cu2OSeO3, FeGe, and MnSi. In these non-centrosymmetric systems, competition between the symmetric exchange interaction and Dzyaloshinskii-Moriya interaction results in the formation of incommensurate spin textures, such as the vortex-like...

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  2. 3664. (I) Exploring Kitaev Magnetism Beyond the Honeycomb Lattice
    Patrick Clancy
    19/06/2023, 11:15
    Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)
    Invited Speaker / Conférencier(ère) invité(e)

    The properties of heavy 5d transition metal oxides, such as iridates and osmates, are often remarkably different from those of their lighter 3d counterparts. In particular, the presence of strong spin-orbit coupling (SOC) in these compounds can give rise to a variety of exotic quantum states, including spin-orbital Mott insulators, topological insulators, Weyl semimetals, and quantum spin...

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  3. 3921. (G*) Nematic and fluctuation-induced first-order phase transitions in AB-stacked kagome bilayers
    Mr Andrey Zelenskiy (Dalhousie University)
    19/06/2023, 11:45
    Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)
    Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

    We present the results of a finite-temperature study of a Heisenberg-Dzyaloshinskii-Moriya Hamiltonian on AB-stacked kagome bilayers. We develop an exact analytical coarse-graining procedure to map the microscopic Hamiltonian onto a generalized XY model on a triangular lattice. To leading order, the effective XY model includes both bilinear and biquadratic interactions. In a large portion of...

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  4. 3894. (U*) Order by Quantum Disorder in the Heisenberg-Compass Model on the Square Lattice: A Perspective from Exact Diagonalization
    Mr Griffin Howson (University of Windsor)
    19/06/2023, 12:00
    Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)
    Oral Competition (Undergraduate Student) / Compétition orale (Étudiant(e) du 1er cycle)

    The Heisenberg-compass model on a square lattice offers a simple example of a frustrated magnet that exhibits the phenomenon of order by disorder (ObD). In this system the ordering direction is selected by quantum zero-point fluctuations for much of the phase diagram, providing a minimal context to explore manifestations of ObD, such as the presence of a pseudo-Goldstone gap. We explore the...

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