{"date_published":"2022-03-17T00:00:00Z","publication_status":"published","department":[{"_id":"MaSe"}],"abstract":[{"lang":"eng","text":"Nonlinear optical responses are commonly used as a probe for studying the electronic properties of materials. For topological materials, studies thus far focused on photogalvanic electric currents, which are forbidden in centrosymmetric materials because they require broken inversion symmetry. In this Letter, we propose a class of symmetry-allowed responses for inversion-symmetric topological insulators with two doubly degenerate bands. We consider a specific example of such a response, the orbital current, and show that the sign of the response reflects the Z2 topological index, i.e., the orbital current changes sign at the transition between trivial and topological insulator phases. This is illustrated in two models of topological insulators: the Bernevig-Hughes-Zhang model and the 1T′ phase of transition metal dichalcogenides."}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2101.08277"}],"type":"journal_article","day":"17","month":"03","article_processing_charge":"No","date_updated":"2023-08-03T06:09:56Z","quality_controlled":"1","title":"Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials","status":"public","oa_version":"Preprint","oa":1,"date_created":"2022-03-18T10:20:46Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","publisher":"American Physical Society","scopus_import":"1","article_type":"letter_note","citation":{"short":"M. Davydova, M. Serbyn, H. Ishizuka, Physical Review B 105 (2022).","ama":"Davydova M, Serbyn M, Ishizuka H. Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials. <i>Physical Review B</i>. 2022;105. doi:<a href=\"https://doi.org/10.1103/PhysRevB.105.L121407\">10.1103/PhysRevB.105.L121407</a>","chicago":"Davydova, Margarita, Maksym Serbyn, and Hiroaki Ishizuka. “Symmetry-Allowed Nonlinear Orbital Response across the Topological Phase Transition in Centrosymmetric Materials.” <i>Physical Review B</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevB.105.L121407\">https://doi.org/10.1103/PhysRevB.105.L121407</a>.","ista":"Davydova M, Serbyn M, Ishizuka H. 2022. Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials. Physical Review B. 105, L121407.","apa":"Davydova, M., Serbyn, M., &#38; Ishizuka, H. (2022). Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials. <i>Physical Review B</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevB.105.L121407\">https://doi.org/10.1103/PhysRevB.105.L121407</a>","ieee":"M. Davydova, M. Serbyn, and H. Ishizuka, “Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials,” <i>Physical Review B</i>, vol. 105. American Physical Society, 2022.","mla":"Davydova, Margarita, et al. “Symmetry-Allowed Nonlinear Orbital Response across the Topological Phase Transition in Centrosymmetric Materials.” <i>Physical Review B</i>, vol. 105, L121407, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevB.105.L121407\">10.1103/PhysRevB.105.L121407</a>."},"article_number":"L121407","_id":"10863","language":[{"iso":"eng"}],"author":[{"first_name":"Margarita","last_name":"Davydova","full_name":"Davydova, Margarita"},{"orcid":"0000-0002-2399-5827","first_name":"Maksym","last_name":"Serbyn","full_name":"Serbyn, Maksym","id":"47809E7E-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Hiroaki","last_name":"Ishizuka","full_name":"Ishizuka, Hiroaki"}],"publication":"Physical Review B","doi":"10.1103/PhysRevB.105.L121407","external_id":{"arxiv":["2101.08277"],"isi":["000800752500001"]},"publication_identifier":{"issn":["2469-9969"]},"acknowledgement":"We are grateful to Takahiro Morimoto and Zhanybek Alpichshev for fruitful discussions. MD was supported by Austrian Agency for International Cooperation in Education and Research (OeAD-GmbH) and by the John Seo Fellowship at MIT. HI was supported by JSPS KAKENHI Grant Numbers JP19K14649 and JP18H03676, and by UTokyo Global Activity Support Program for\r\nYoung Researchers.","isi":1,"intvolume":"       105","volume":105,"year":"2022"}