2023 CAP Congress / Congrès de l'ACP 2023

Session

(DCMMP) W1-7 Condensed Matter Theory I | Théorie de la matière condensée I (DPMCM)

W1-7

21 Jun 2023, 10:30

University of New Brunswick

Conveners

(DCMMP) W1-7 Condensed Matter Theory I | Théorie de la matière condensée I (DPMCM)

• Tami Pereg-Barnea

3577. (I) Dynamic response and correlation exchange kernel of the electron gas from algorithmic computational tools.

James LeBlanc (Memorial University of Newfoundland)

21/06/2023, 10:30

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Invited Speaker / Conférencier(ère) invité(e)

The general computation of dynamic properties of materials remains a longstanding, difficult problem within computational physics. Surprisingly, simple models such as the homogeneous electron gas (jellium) play critical roles in application of Density Functional Theory and its time-dependent extensions. Those calculations are impeded by the difficulty of evaluating Feynman diagrams on the...

3817. Seeing the strongly-correlated zero-bias anomaly in double quantum dot measurements

Rachel Wortis

21/06/2023, 11:00

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral (Non-Student) / Orale (non-étudiant(e))

Experiments in doped transition metal oxides often show suppression in the single-particle density of states at the Fermi level, but disorder-induced zero-bias anomalies in strongly-correlated systems remain poorly understood. Numerical studies of the Anderson-Hubbard model have identified a zero-bias anomaly that is unique to strongly correlated materials, with a width proportional to the...

3814. Method Comparison for Calculating Properties of Charged Ferroelectric Domain Walls

Carson Carroll

21/06/2023, 11:15

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

We consider two approaches when calculating the properties of a ferroelectric system with charged
domain walls. These properties include domain wall width, electronic band structure and occupancy,
and the electronic potential energy. Previously, a single parameter, Q, was argued to determine the
crossover of the electron gas from quantum to quasi-classical. However, to obtain this result,...

3859. (I) Berry phase in the rigid rotor: the emergent physics of odd antiferromagnets

Ganesh Ramachandran (Brock University)

21/06/2023, 11:30

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Invited Speaker / Conférencier(ère) invité(e)

The rigid rotor is a classic problem in quantum mechanics, describing the dynamics of a rigid body with its centre of mass held fixed. It can be viewed as the quantum mechanics of a particle moving in SO(3), the space of all rotations in three dimensions. The particle can move along two types of closed loops: trivial loops that can be adiabatically shrunk to a point and non-trivial loops that...