Kim, Jeongwoo Kim, Kyoung-Whan Shin, Dongbin Lee, Sang-Hoon Sinova, Jairo Park, Noejung Jin, Hosub 2024-01-19T19:31:03Z 2024-01-19T19:31:03Z 2021-09-04 2019-09 2041-1723 https://pubs.kist.re.kr/handle/201004/119651 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. English Nature Publishing Group Prediction of ferroelectricity-driven Berry curvature enabling charge- and spin-controllable photocurrent in tin telluride monolayers Article 10.1038/s41467-019-11964-6 1 Nature Communications, v.10 Nature Communications 10 Y scie scopus 000483711600006 2-s2.0-85071761865 Multidisciplinary Sciences Science & Technology - Other Topics Article PHASE DYNAMICS 강유전성 베리곡률 광전류 이차원물질