6 papers · 1 filter
Real-time dynamics of the two-step charge-density-wave transition in bulk 1T-TaS
Daeheon Kim, Jinseok Oh, Kahyeon Koh +4
The charge-density wave (CDW) of bulk 1T-TaS2 is built from Star-of-David (SoD) clusters tiling a sqrt{13} x sqrt{13} superlattice, and it melts through a two-step sequence accompa…
Light-induced ideal Weyl semimetal in HgTe via nonlinear phononics
Dongbin Shin, Angel Rubio, Peizhe Tang
Interactions between light and matter allow the realization of out-of-equilibrium states in quantum solids. In particular, nonlinear phononics is one of the efficient approaches to…
A time-based Chern number in periodically-driven systems in the adiabatic limit
I-Te Lu, Dongbin Shin, Umberto De Giovannini +4
To define the topology of driven systems, recent works have proposed synthetic dimensions as a way to uncover the underlying parameter space of topological invariants. Using time a…
The Ferroelectric Photo-Groundstate of SrTiO: Cavity Materials Engineering
Simone Latini, Dongbin Shin, Shunsuke A. Sato +4
Optical cavities confine light on a small region in space which can result in a strong coupling of light with materials inside the cavity. This gives rise to new states where quant…
The quantum paraelectric phase of SrTiO from first principles
Dongbin Shin, Simone Latini, Christian Schäfer +4
We demonstrate how the quantum paraelectric ground state of SrTiO can be accessed via a microscopic approach based on density functional theory. At low temperature…
Nonlinear phononics in 2D SnTe: a ferroelectric material with phonon dynamical amplification of electric polarization
Dongbin Shin, Shunsuke A. Sato, Hannes Hübener +3
Ultrafast optical control of ferroelectricity using intense terahertz fields has attracted significant interest. Here we show that the nonlinear interactions between two optical ph…