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Giant intrinsic photoresponse in pristine graphene
Qiong Ma, Chun Hung Lui, Justin C. W. Song +14
When the Fermi level matches the Dirac point in graphene, the reduced charge screening can dramatically enhance electron-electron (e-e) scattering to produce a strongly interacting…
Ultrafast manipulation of mirror domain walls in a charge density wave
Alfred Zong, Xiaozhe Shen, Anshul Kogar +11
Domain walls (DWs) are singularities in an ordered medium that often host exotic phenomena such as charge ordering, insulator-metal transition, or superconductivity. The ability to…
Observation of the nonlinear Hall effect under time reversal symmetric conditions
Qiong Ma, Su-Yang Xu, Huitao Shen +18
The electrical Hall effect is the production of a transverse voltage under an out-of-plane magnetic field. Historically, studies of the Hall effect have led to major breakthroughs…
Electrically switchable Berry curvature dipole in the monolayer topological insulator WTe2
Su-Yang Xu, Qiong Ma, Huitao Shen +16
Recent experimental evidence for the quantum spin Hall (QSH) state in monolayer WTe has bridged two of the most active fields of condensed matter physics, 2D materials and topo…
Disentangling amplitude and phase dynamics of a charge density wave in a photo-induced phase transition
Alfred Zong, Anshul Kogar, Ya-Qing Bie +16
Upon excitation with an intense ultrafast laser pulse, a symmetry-broken ground state can undergo a non-equilibrium phase transition through pathways dissimilar from those in therm…
Topological crystalline insulator states in the CaAs family
Xiaoting Zhou, Chuang-Han Hsu, Tay-Rong Chang +9
Topological crystalline insulators (TCI) are insulating electronic phases of matter with nontrivial topology originating from crystalline symmetries. Recent theoretical advances ha…