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RESEARCH PRODUCT
Prediction of ferroelectricity-driven Berry curvature enabling charge- and spin-controllable photocurrent in tin telluride monolayers
Jairo SinovaHosub JinDongbin ShinSanghoon LeeJeongwoo KimNoejung ParkKyoung-whan Kimsubject
0301 basic medicineMaterials scienceBand gapSciencePoint reflectionGeneral Physics and AstronomyFOS: Physical sciences02 engineering and technologyGeneral Biochemistry Genetics and Molecular BiologyArticle03 medical and health scienceschemistry.chemical_compoundCondensed Matter::Materials ScienceNanoscience and technologyMonolayerMesoscale and Nanoscale Physics (cond-mat.mes-hall)Symmetry breakinglcsh:ScienceCondensed Matter - Materials ScienceMultidisciplinaryCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsPhysicsQMaterials Science (cond-mat.mtrl-sci)General Chemistry021001 nanoscience & nanotechnologyCondensed Matter::Mesoscopic Systems and Quantum Hall EffectFerroelectricityMaterials scienceTin tellurideDipole030104 developmental biologychemistrylcsh:QBerry connection and curvature0210 nano-technologydescription
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 example, the monopole component of the BC is induced by the time-reversal symmetry breaking, and the BC dipole arises from a lack of inversion symmetry, leading to the anomalous Hall and nonlinear Hall effects, respectively. Based on first-principles calculations, we show that the ferroelectricity in a tin telluride monolayer produces a unique BC distribution, which offers charge- and spin-controllable photocurrents. Even with the sizable band gap, the ferroelectrically driven BC dipole is comparable to those of small-gap topological materials. By manipulating the photon handedness and the ferroelectric polarization, charge and spin circular photogalvanic currents are generated in a controllable manner. The ferroelectricity in group-IV monochalcogenide monolayers can be a useful tool to control the BC dipole and the nonlinear optoelectronic responses.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-08-25 |