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In this paper, we propose another control over spin, termed as a spin splitter, with an aim to split the two spin channels from the spatially overlapped paths into two isolated branches. Based on a density functional study, we implement this idea in ferromagnetic zigzag graphene nanoribbons (ZGNRs) and find that <jats:inline-formula>\n                     <jats:tex-math\/>\n                     <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mi>h<\/mml:mi>\n                        <mml:mo>\u2212<\/mml:mo>\n                     <\/mml:math>\n                  \n                  <\/jats:inline-formula>BN nanoribbon embedded in the ZGNR acts as a perfect spin splitter. It originates from the different interfacial dipoles developed at the N\u2013C and B\u2013C interfaces and the subsequent different built-in transverse electric fields, which drives the two narrow side ZGNRs into half-metallicity with different spin polarity. The findings will be of great significance in spintronics.<\/jats:p>","DOI":"10.1088\/2053-1583\/aca8b6","type":"journal-article","created":{"date-parts":[[2022,12,5]],"date-time":"2022-12-05T17:12:52Z","timestamp":1670260372000},"page":"015017","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":8,"title":["<i>h<\/i>-BN as a perfect spin splitter in ferromagnetic zigzag graphene nanoribbons"],"prefix":"10.1088","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4552-9605","authenticated-orcid":true,"given":"Lingling","family":"Song","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yan","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Runlong","family":"Ye","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lu","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Canglong","family":"Wei","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Han","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaohong","family":"Zheng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"266","published-online":{"date-parts":[[2022,12,16]]},"reference":[{"key":"tdmaca8b6bib1","doi-asserted-by":"publisher","first-page":"323","DOI":"10.1103\/RevModPhys.76.323","type":"journal-article","volume":"76","author":"\u017duti\u0107","year":"2004","journal-title":"Rev. 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