7 papers
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…
Identification of the Mott insulating CDW state in 1T-TaS
Dongbin Shin, Nicolas Tancogne-Dejean, Jin Zhang +3
We investigate the low-temperature charge-density-wave (CDW) state of bulk TaS with a fully self-consistent DFT+U approach, over which the controversy has remained unresolved r…
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…
Prediction of ferroelectricity-driven Berry curvature enabling charge- and spin-controllable photocurrent in tin telluride monolayers
Jeongwoo Kim, Kyoung-Whan Kim, Dongbin Shin +4
In symmetry-broken crystalline solids, pole structures of Berry curvature (BC) can emerge, and they have been utilized as a versatile tool for controlling transport properties. For…