Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T21: Moire Beyond Graphene II
11:30 AM–2:18 PM,
Thursday, March 9, 2023
Room: Room 213
Sponsoring
Unit:
DCMP
Chair: Ziyan Zhu, Stanford University
Abstract: T21.00001 : Analysis of Moiré Phonons in 2D Twisted Bilayers*
11:30 AM–11:42 AM
Presenter:
Daniel T Larson
(Harvard University)
Authors:
Daniel T Larson
(Harvard University)
Jonathan Z Lu
(Harvard University)
Ziyan Zhu
(Stanford University)
Mattia Angeli
(Harvard University)
Efthimios Kaxiras
(Harvard University)
measurements such as Raman scattering and for determining the phonon contribution to exotic phases such as superconductivity. We
have previously developed a continuum model for moiré phonons based on density functional theory calculations of local atomic
configurations. Using this model we analyze the ultrasoft shearing modes related to translations of the moiré pattern. We also
compare and contrast the real-space atomic vibration patterns for aligned (0-degree or 3R) and reversed (180-degree or 2H)
transition metal dichalcogenide bilayers.
*NSF Grant No. DMR-1231319NSF Award No. DMR-1922172ARO Award No. W911NF-21-2-0147Simons Foundation, Award No. 896626
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