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Published byΠύῤῥος Παπάζογλου Modified over 5 years ago
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Fig. 3 CC and its microscopic origin in 2D ferroelastic-ferroelectric monolayer group IV monochalcogenide GeS. CC and its microscopic origin in 2D ferroelastic-ferroelectric monolayer group IV monochalcogenide GeS. (A and B) Two opposite CC susceptibility tensor elements induced by the circularly polarized light. (C and D) Evolution of reciprocal vector k-resolved CC susceptibility under the circularly polarized light at two different frequencies (2.3 and 2.8 eV). (E and F) Group velocity difference and Berry curvature between the highest valence band and the lowest conduction band. The white arrows in (E) denote the calculated group velocity difference at specific k point, and the black curves indicate the associated stream lines. Hua Wang, and Xiaofeng Qian Sci Adv 2019;5:eaav9743 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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