24 citations · 40 across the 6 of their papers we have counts for
7 papers
Nonlinear optical responses of semiconducting graphene nanoribbons: Strong constraint from a hidden symmetry
Jiawei Ruan, Weichen Tang, Yang-Hao Chan +3
Nonlinear optical (NLO) responses are powerful tools for probing material structures, as they are highly sensitive to spatial symmetries. For instance, it is well known that having…
{\it Ab initio} prediction of -wave superconductivity in infinite-layer nickelates
Guang-Yu Guo, Ren-Guo Guo, Yun-Chen Liao +1
Infinite-layer nickelates have recently emerged as a new family of potential unconventional high critical temperature () superconductors. However, fundamental questions such a…
Anisotropic hot carrier relaxation mediated by electron phonon scattering in TiN thin films
Hemant Verma, Tzu-Yu Peng, Shyr-Shyan Yeh +5
Crystal orientations can shape the ultrafast energy relaxations of transition-metal nitride thin films. Here, we investigate the orientation-dependent electron-phonon (e-ph) mediat…
Evolution of topological phases in atomically thin WTe2 films
Changcang Qiao, Chen-Chia Hsu, Tao Zhang +4
Topological materials ranging from topological insulators to semimetals host many novel quantum phenomena including quantum spin Hall effect and topological Fermi arcs. Transitions…
Diagrammatic approach to excitonic effects on nonlinear optical response
Yu-Tzu Chang, Yang-Hao Chan
Optical responses of atomically thin 2D materials are greatly influenced by electron-hole interactions. It is by far established that exciton signatures can be well-identified in t…
Exciton enhanced nonlinear optical responses in monolayer h-BN and MoS2: Insight from first-principles exciton-state coupling formalism and calculations
Jiawei Ruan, Y. -H. Chan, Steven G. Louie
Excitons are vital in the photophysics of materials, especially in low-dimensional systems. The conceptual and quantitative understanding of excitonic effects in nonlinear optical…
A gate-tunable quantum phase transition in a topological excitonic insulator
Yande Que, Yang-Hao Chan, Junxiang Jia +9
Coulomb interactions among electrons and holes in two-dimensional (2D) semimetals with overlapping valence and conduction bands can give rise to a correlated insulating ground stat…