{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T23:09:42Z","timestamp":1784070582424,"version":"3.55.0"},"reference-count":49,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2022,7,18]],"date-time":"2022-07-18T00:00:00Z","timestamp":1658102400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation","award":["11872309"],"award-info":[{"award-number":["11872309"]}]},{"name":"National Natural Science Foundation","award":["12172293"],"award-info":[{"award-number":["12172293"]}]},{"name":"National Natural Science Foundation","award":["2022JC\u201302"],"award-info":[{"award-number":["2022JC\u201302"]}]},{"name":"National Natural Science Foundation","award":["2022A1515010633"],"award-info":[{"award-number":["2022A1515010633"]}]},{"name":"Natural Science Basic Research Program of Shaanxi Province","award":["11872309"],"award-info":[{"award-number":["11872309"]}]},{"name":"Natural Science Basic Research Program of Shaanxi Province","award":["12172293"],"award-info":[{"award-number":["12172293"]}]},{"name":"Natural Science Basic Research Program of Shaanxi Province","award":["2022JC\u201302"],"award-info":[{"award-number":["2022JC\u201302"]}]},{"name":"Natural Science Basic Research Program of Shaanxi Province","award":["2022A1515010633"],"award-info":[{"award-number":["2022A1515010633"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation","award":["11872309"],"award-info":[{"award-number":["11872309"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation","award":["12172293"],"award-info":[{"award-number":["12172293"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation","award":["2022JC\u201302"],"award-info":[{"award-number":["2022JC\u201302"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation","award":["2022A1515010633"],"award-info":[{"award-number":["2022A1515010633"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Two\u2013dimensional (2D) transition metal dichalcogenides endow individually addressable valleys in momentum space at the K and K\u2019 points in the first Brillouin zone due to the breaking of inversion symmetry and the effect of spin\u2013orbit coupling. However, the application of 2H\u2013VS2 monolayer in valleytronics is limited due to the valence band maximum (VBM) located at the \u0393 point. Here, by involving the 2D ferroelectric (FE) CuInP2Se6 (CIPSe), the ferrovalley polarization, electronic structure, and magnetic properties of 2D 2H\u2013VS2\/CIPSe heterostructures with different stacking patterns and FE polarizations have been investigated by using first\u2013principles calculations. It is found that, for the energetically favorable AB\u2013stacking pattern, the valley polarization is preserved when the FE polarization of CIPSe is upwards (CIPSe\u2191) or downwards (CIPSe\u2193) with the splitting energies slightly larger or smaller compared with that of the pure 2H\u2013VS2. It is intriguing that, for the FE CIPSe\u2191 case, the VBM is expected to pass through the Fermi energy level, which can be eventually achieved by applying biaxial strain and thus the valleytronic nature is turned off; however, for the CIPSe\u2193 situation, the heterostructure basically remains semiconducting even under biaxial strains. Therefore, with the influence of proper strains, the FE polar reversal of CIPSe can be used as a switchable on\/off to regulate the valley polarization in VS2. These results not only demonstrate that 2H\u2013VS2\/CIPSe heterostructures are promising potential candidates in valleytronics, but also shed some light on developing practical applications of valleytronic technology.<\/jats:p>","DOI":"10.3390\/nano12142461","type":"journal-article","created":{"date-parts":[[2022,7,18]],"date-time":"2022-07-18T11:32:23Z","timestamp":1658143943000},"page":"2461","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Controllable Valley Polarization and Strain Modulation in 2D 2H\u2013VS2\/CuInP2Se6 Heterostructures"],"prefix":"10.3390","volume":"12","author":[{"given":"Fan","family":"Yang","sequence":"first","affiliation":[{"name":"School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Shang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi\u2019an 710021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liangzhi","family":"Kou","sequence":"additional","affiliation":[{"name":"School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0901-0294","authenticated-orcid":false,"given":"Chun","family":"Li","sequence":"additional","affiliation":[{"name":"School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi\u2019an 710072, China"},{"name":"Research and Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zichen","family":"Deng","sequence":"additional","affiliation":[{"name":"School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi\u2019an 710072, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,7,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1016\/j.pmatsci.2015.02.002","article-title":"Recent development in 2D materials beyond graphene","volume":"73","author":"Gupta","year":"2015","journal-title":"Prog. 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