Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session B11: 2D Materials (Non-Graphene)
11:30 AM–2:06 PM,
Monday, March 4, 2024
Room: M100B
Sponsoring
Unit:
DCMP
Chair: Hiroyuki Nakamura, University of Arkansas
Abstract: B11.00002 : Pb-induced growth of bilayer germanene on Ag(111)
11:42 AM–11:54 AM
Presenter:
Ting-Yu Chen
(National Tsing Hua University)
Authors:
Ting-Yu Chen
(National Tsing Hua University)
Shu-Jung Tang
(National Tsing Hua University)
Hung-chung Hsueh
(Tamkang University)
Shun-Jen Cheng
(National Yang Ming Chiao Tung University)
Chin En Hsu
(Tamkang University)
CHING-YU HEI
(National Yang Ming Chiao Tung University)
We report an approach of growing bilayer germanene using a Pb layer as a template deposited on a quasi-freestanding phase (QP) germanene grown on Ag(111), and then further depositing extra germanium atoms on the surface to form bilayer germanene. Using low-energy electron diffraction (LEED), scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES), we confirm the existence of bilayer germanene and propose a structural model which is: a 5-layer stack consisting of Ag(111) at the bottom, QP germanene with the same orientation at the second layer, a Pb(111) layer with 30-degree rotation at the third layer, and AB-stacking bilayer germanene on the top. The energy band structure measured by ARPES agrees reasonably with our density function theory (DFT) calculation based on the model of AB-staking bilayer germanene on Pb(111).
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