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Phys.: Condens. Matter"],"published-print":{"date-parts":[[2026,8,7]]},"abstract":"Abstract<\/jats:title>\n \n Polycrystalline MgV\n \n 2-\n x<\/jats:italic>\n <\/jats:sub>\n Ti\n \n x<\/jats:sub>\n <\/jats:italic>\n O\n 4<\/jats:sub>\n powders were synthesized by the solid-state reaction method. It is found that the resistivity does not decrease monotonically with increasing Ti concentration. During the doping process, the t\n 2g<\/jats:sub>\n electrons from Ti\n 3+<\/jats:sup>\n are transferred to the t\n 2g<\/jats:sub>\n orbitals of V\n 3+<\/jats:sup>\n through the 2p orbitals of oxygen, which suppress the original complex orbital order of (\n \n d\n yz<\/jats:sub>\n <\/jats:italic>\n \u00b1\n \n d\n zx<\/jats:sub>\n <\/jats:italic>\n )\/\n \n \n \n <\/jats:tex-math>\n \n \n \n 2<\/mml:mn>\n <\/mml:msqrt>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula>\n and thereby induces orbital reconstruction. For 0 \u2a7d\n x<\/jats:italic>\n \u2a7d 1.0, as the Ti doping concentration increases, more V\n 3+<\/jats:sup>\n is converted to V\n 2+<\/jats:sup>\n . In the low-temperature region, the Mott characteristic temperature\n T<\/jats:italic>\n 0<\/jats:sub>\n decreases, indicating that electron localization weakens. In the high-temperature region, the fully occupied t\n 2g<\/jats:sub>\n orbitals of V\n 2+<\/jats:sup>\n can be excited more easily, leading to a reduction in the electrical activation energy \u0394\n E<\/jats:italic>\n . When the doping concentration\n x<\/jats:italic>\n > 1.0, excessive Ti induces Ti\u2013Ti dimerization and forms a new orbital order with alternating occupation of\n \n d\n yz<\/jats:sub>\n <\/jats:italic>\n and\n \n d\n zx<\/jats:sub>\n <\/jats:italic>\n orbitals, where electrons become confined within the Ti\u2013Ti dimer sites. Correspondingly, the Mott temperature\n T<\/jats:italic>\n 0<\/jats:sub>\n increases at low temperatures, while the V\n 2+<\/jats:sup>\n concentration decreases, which finally results in an increase in the activation energy \u0394\n E<\/jats:italic>\n at high temperatures.\n <\/jats:p>","DOI":"10.1088\/1361-648x\/ae9022","type":"journal-article","created":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T22:53:39Z","timestamp":1784933619000},"page":"315401","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Orbital reconstruction and electrical transport behaviors of Ti-doped MgV\n 2<\/sub>\n O\n 4<\/sub>"],"prefix":"10.1088","volume":"38","author":[{"given":"Chengzhao","family":"Yang","sequence":"first","affiliation":[{"name":"Hebei Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9652-3257","authenticated-orcid":true,"given":"Congmian","family":"Zhen","sequence":"additional","affiliation":[{"name":"Hebei Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lu","family":"Liu","sequence":"additional","affiliation":[{"name":"Hebei Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Man","family":"Guo","sequence":"additional","affiliation":[{"name":"Hebei Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5353-3543","authenticated-orcid":true,"given":"Li","family":"Ma","sequence":"additional","affiliation":[{"name":"Hebei Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guoke","family":"Li","sequence":"additional","affiliation":[{"name":"Hebei Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dewei","family":"Zhao","sequence":"additional","affiliation":[{"name":"Hebei Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5965-5034","authenticated-orcid":true,"given":"Denglu","family":"Hou","sequence":"additional","affiliation":[{"name":"Hebei Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,8,6]]},"reference":[{"key":"cmae9022bib1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.101.024112","type":"journal-article","article-title":"Orbital molecules in vanadium oxide spinels","volume":"101","author":"Browne","year":"2020","journal-title":"Phys. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2026-04-30","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-07-24","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-08-06","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}