425 citations · 2.6k across the 21 of their papers we have counts for
9 papers · 1 filter
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…
Emergence of Gapped Bulk and Metallic Side Walls in the Zeroth Landau level in Dirac and Weyl semimetals
Ching-Kit Chan, Patrick A. Lee
Recent transport experiments have revealed the activation of longitudinal magnetoresistance of Weyl semimetals in the quantum limit, suggesting the breakdown of chiral anomaly in a…
Photocurrents in Weyl semimetals
Ching-Kit Chan, Netanel H. Lindner, Gil Refael +1
The generation of photocurrent in an ideal two-dimensional Dirac spectrum is symmetry-forbidden. In sharp contrast, we show that three-dimensional Weyl semimetals can generically s…
Type-II Weyl cone transitions in driven semimetals
Ching-Kit Chan, Yun-Tak Oh, Jung Hoon Han +1
Periodically driven systems provide tunable platforms to realize interesting Floquet topological phases and phase transitions. In electronic systems with Weyl dispersions, the band…
Adiabatic Green's function technique and the transient behavior in time-dependent fermion-boson coupled models
Yun-Tak Oh, Yoichi Higashi, Ching-Kit Chan +1
The Lang-Firsov Hamiltonian, a well-known solvable model of interacting fermion-boson system with sideband features in the fermion spectral weight, is generalized to have the time-…
Selective scattering between Floquet-Bloch and Volkov states in a topological insulator
Fahad Mahmood, Ching-Kit Chan, Zhanybek Alpichshev +4
The coherent optical manipulation of solids is emerging as a promising way to engineer novel quantum states of matter. The strong time periodic potential of intense laser light can…
When chiral photons meet chiral fermions - Photoinduced anomalous Hall effects in Weyl semimetals
Ching-Kit Chan, Patrick A. Lee, Kenneth S. Burch +2
The Weyl semimetal is characterized by three-dimensional linear band touching points called Weyl nodes. These nodes come in pairs with opposite chiralities. We show that the coupli…
Quantum correlation of an optically controlled quantum system
Ching-Kit Chan, L. J. Sham
A precise time-dependent control of a quantum system relies on an accurate account of the quantum interference among the system, the control and the environment. A diagrammatic tec…
Precision of electromagnetic control of a quantum system
Ching-Kit Chan, L. J. Sham
Coherent control of a spin is limited by both the decoherence due to coupling with the environment and noise coming from the quantized control. The quantum noise study of this syst…