{"corpus_id":262636506,"paper_sha":"96ba03e8ea870b2c30b8a9b9d0ec4b801aec0915","doi":"10.1021/acs.nanolett.1c01481","arxiv_id":"2103.03242","pmid":34152777,"pmcid":null,"mag_id":3134221563,"dblp_id":null,"acl_id":null,"title":"Spatiotemporal Imaging of Thickness-Induced Band-Bending Junctions.","year":2021,"publication_date":"2021-03-04","venue":"Nano letters (Print)","journal":{"name":"Nano letters","pages":null,"volume":null},"journal_issn":null,"journal_title":null,"publication_types":["JournalArticle"],"pubmed_pub_types":["Journal Article","Research Support, U.S. Gov't, Non-P.H.S.","Research Support, U.S. Gov't, P.H.S."],"s2_fields_of_study":["Materials Science","Physics","Medicine"],"reference_count":39,"citation_count":14,"influential_citation_count":0,"is_open_access":true,"arxiv_categories":["cond-mat.mes-hall","cond-mat.mtrl-sci","physics.app-ph"],"arxiv_license":"http://creativecommons.org/licenses/by/4.0/","arxiv_journal_ref":null,"mesh_headings":[{"d":"Diagnostic Imaging","mj":true,"ui":"D003952"}],"chemicals":null,"comments_corrections":null,"source_flags":5,"s2_open_access_pdf_url":"https://authors.library.caltech.edu/records/2wdpe-jte39/files/2103.03242.pdf?download=1","s2_open_access_landing_url":"https://www.semanticscholar.org/paper/96ba03e8ea870b2c30b8a9b9d0ec4b801aec0915","s2_open_access_license":null,"s2_open_access_status":"GREEN","pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"van der Waals materials exhibit naturally passivated surfaces and an ability to form versatile heterostructures to enable an examination of carrier transport mechanisms not seen in traditional materials. Here, we report a new type of homojunction termed a \"band-bending junction\" whose potential landscape depends solely on the difference in thickness between the two sides of the junction. Using MoS2 on Au as a prototypical example, we find that surface potential differences can arise from the degree of vertical band bending in thin and thick regions. Furthermore, by using scanning ultrafast electron microscopy, we examine the spatiotemporal dynamics of charge carriers generated at this junction and find that lateral carrier separation is enabled by differences in the band bending in the vertical direction, which we verify with simulations. Band-bending junctions may therefore enable new optoelectronic devices that rely solely on band bending arising from thickness variations to separate charge carriers.","claims":[{"public_id":"cl_74b74e4401fc4d8f574e4af185ac5f37","status":"active","text":"A new type of homojunction termed a band-bending junction has a potential landscape that depends solely on the difference in thickness between the two sides of the junction.","confidence":0.85,"contributors":[{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["extraction"],"url":"https://sah.borca.ai/u/322360f1c1"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous 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differences arise from the degree of vertical band bending differing between thin and thick regions.","confidence":0.85,"contributors":[{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["extraction"],"url":"https://sah.borca.ai/u/322360f1c1"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_da6dd058d8e9e009f469bee49a290fd2"},{"public_id":"cl_46b0a066777cae65dea68d14e31dbdf3","status":"active","text":"Scanning ultrafast electron microscopy reveals that lateral carrier separation at the band-bending junction is enabled by differences in vertical band bending, consistent with simulations.","confidence":0.85,"contributors":[{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale 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