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2019 CAP Congress / Congrès de l'ACP 2019

2–7 Jun 2019
Simon Fraser University
America/Vancouver timezone
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Session

R1-3 Condensed Matter Theory II (DCMMP) | Théorie de la matière condensée II (DPMCM)

R1-3
6 Jun 2019, 10:45
Simon Fraser University

Simon Fraser University

Conveners

R1-3 Condensed Matter Theory II (DCMMP) | Théorie de la matière condensée II (DPMCM)

  • Michel Gingras

Presentation materials

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  1. 2778. The magnon-mediated attraction between two holes doped in a CuO2 layer
    Mona Berciu (University of British Columbia)
    06/06/2019, 10:45
    Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)
    Invited Speaker / Conférencier(ère) invité(e)

    We study a realistic three-band model for two holes doped into a CuO2 layer, using a variational method that allows us to turn on/off the exchange of magnons between the holes. This enables us to verify that the magnon-mediated effective hole-hole interaction is attractive and could therefore indeed be (part of) the superconducting glue. We derive its analytical expression and show that it...

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  2. 2555. Valley filters, accumulators, and switches induced in graphene quantum dots by lines of adsorbed hydrogen atoms
    Mohammadhadi Azari (Simon Fraser University)
    06/06/2019, 11:15
    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 electronic structure and quantum transport calculations that predict conducting channels induced in graphene quantum dots by lines of adsorbed hydrogen atoms to function as highly efficient, experimentally realizable valley filters, accumulators, and switches. The underlying physics is an interesting property of graphene Dirac point resonances (DPRs) that is revealed here, namely,...

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  3. 2463. Incompressible Even Denominator Fractional Quantum Hall States in the Zeroth Landau Level of Monolayer Graphene
    SUJIT NARAYANAN (SIMON FRASER UNIVERSITY)
    06/06/2019, 11:30
    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)

    Incompressible fractional quantum Hall states at even denominator fractions (ν = 1/2, 1/4) have recently been observed in experiments in monolayer graphene. We use a Chern-Simons description of multicomponent fractional quantum Hall states in graphene to study these incompressible fractional quantum hall states in the zeroth Landau level and suggest variational wavefunctions that may describe...

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  4. 2621. Symmetry protected Luttinger liquids on the surface of Quantum Hall Nematics.
    Kartiek Agarwal (McGill University)
    06/06/2019, 11:45
    Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)
    Invited Speaker / Conférencier(ère) invité(e)

    Quantum Hall Ferromagnets are a unique platform to study the confluence of symmetry-broken order parameter and topological physics. Recent experiments by Feldman et al.[1] observe clear signatures of valley-polarized Quantum Hall Ferromagnets on the surface of Bi(111) in the presence of strong magnetic fields. The tunneling conductance shows a discrete spectrum indicating the formation of...

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