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Non-Universal Critical Behaviors in Disordered Pseudospin-1 Systems
A. Fang, Z. Q. Zhang, Steven G. Louie +1
It is well known that for ordinary one-dimensional (1D) disordered systems, the Anderson localization length diverges as in the long wavelength limit ($λ\rightarrow \inft…
Hierarchical On-Surface Synthesis of Deterministic Graphene Nanoribbon Heterojunctions
Christopher Bronner, Rebecca A. Durr, Daniel J. Rizzo +8
Bottom-up graphene nanoribbon (GNR) heterojunctions are nanoscale strips of graphene whose electronic structure abruptly changes across a covalently bonded interface. Their rationa…
Orbital symmetry and the optical response of single-layer monochalcogenides
Gabriel Antonius, Diana Y. Qiu, Steven G. Louie
The absorption spectra of single-layer GaSe and GaTe in the hexagonal phase feature exciton peaks with distinct polarization selectivity. We investigate these distinct features fro…
Dynamics of Symmetry-Breaking Stacking Boundaries in Bilayer MoS2
Aiming Yan, Chin Shen Ong, Diana Yuan Qiu +5
Crystal symmetry of two-dimensional (2D) materials plays an important role in their electronic and optical properties. Engineering symmetry in 2D materials has recently emerged as…
Band Topology, Orbital Phase Winding, and Selection Rules in Excitonic Physics in Two Dimensions
Ting Cao, Meng Wu, Steven G. Louie
We show that band topology can dramatically change the photophysics of two-dimensional (2D) semiconductors. For systems in which states near the band extrema are of multiple orbita…
Real-space study of the optical absorption in alternative phases of silicon
Chin Shen Ong, Sinisa Coh, Marvin L. Cohen +1
We introduce a real-space approach to understand the relationship between optical absorption and crystal structure. We apply this approach to alternative phases of silicon, with a…