2026 CAP Congress / Congrès de l'ACP 2026

Session

(DCMMP) M3-4 | (DPMCM)

M3-4

22 Jun 2026, 16:15

U. Ottawa - Learning Crossroads (CRX) Building

523. Chiral Phonons at Simple Cubic (111) Surfaces

Brennan Cornell (Trent University)

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)

Chiral phonons are found in crystalline materials that break inversion symmetry or time-reversal symmetry such as the honeycomb lattice. The simple cubic lattice does not satisfy these constraints, but the (111) surface of a simple cubic can be made to do so under certain conditions. We discuss a method to break the symmetry of the simple cubic lattice, and enable the emergence of...

617. Phonons Below 40 meV in a Series of 214 Cuprate Superconductors at the 1/8 Hole Doping Anomaly, where Superconducting Tc Caries from 3 K to 27 K

Xinran Liu (McMaster University)

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)

The La2-x-yNdy=0.4Srx=0.125CuO4 (Nd-LSCO) system is one of three 214 families of quasi-two dimensional cuprate superconductors which has been tuned to 1/8 hole doping. At this doping, the three dimensional superconducting transition temperature, Tc, is strongly suppressed compared to hole doping concentrations near x=0.125 in Nd-LSCO. A similar “1/8 anomaly” describes the superconducting...

673. Tracking Coherent Phonon Dynamics in a Quantum Material with High Harmonic Spectroscopy

Vedran Jelic (National Research Council Canada)

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

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

High harmonic spectroscopy (HHS) has emerged as a powerful all-optical probe of ultrafast electronic and lattice dynamics in solids. I will present how time-resolved HHS can be used to study coherently driven phonons in the type-II Weyl semimetal WTe$_2$. Following ultrafast near-infrared excitation, coherently launched lattice oscillations modulate the electronic band structure and, in turn,...