Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session N10: Twisted Bilayer Heterostructures
11:30 AM–2:30 PM,
Wednesday, March 6, 2024
Room: M100A
Sponsoring
Unit:
DCMP
Chair: Guangxin Ni, Florida State University
Abstract: N10.00011 : Charge density waves and moiré reconstruction in twisted NbSe2/NbSe2 bilayers*
1:30 PM–1:42 PM
Presenter:
Christopher Tat Shun T Cheung
(Imperial College London)
Authors:
Christopher Tat Shun T Cheung
(Imperial College London)
Arash A Mostofi
(Imperial College London)
Zachary A Goodwin
(Imperial College London)
Johannes C Lischner
(Imperial College London)
Adolfo O Fumega
(Aalto University)
Here we focus on twisted bilayers of metallic NbSe2. On the one hand, the different local stacking arrangements in the moiré cell cause atomic relaxations (both in-plane and out-of-plane). On the other hand, monolayer NbSe2 exhibits spontaneous symmetry breaking into a charge density wave state with a 3x3 unit cell lattice reconstruction. In this project we use first-principles density functional theory calculations to study and understand the coexistence of these two types of atomic relaxation in twisted NbSe2 bilayers.
*Croucher Foundation Imperial College London President's PhD scholarships
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