Competition between crystal field splitting and Hund’s rule coupling in two-orbital magnetic metal-insulator transitions
Competition between crystal field splitting and Hund’s rule coupling in magnetic metal-insulator transitions of half-filled two-orbital Hubbard model is investigated by multi-orbital slave-boson mean field theory. We show that with the increase of Coulomb interaction, the system firstly transits fro...
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| Veröffentlicht in: | The European physical journal. B, Condensed matter physics Condensed matter physics, 2012-02, Vol.85 (2), Article 55 |
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| container_title | The European physical journal. B, Condensed matter physics |
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| creator | Quan, Y. M. Zou, L. J. Liu, D. Y. Lin, H. Q. |
| description | Competition between crystal field splitting and Hund’s rule coupling in magnetic metal-insulator transitions of half-filled two-orbital Hubbard model is investigated by multi-orbital slave-boson mean field theory. We show that with the increase of Coulomb interaction, the system firstly transits from a paramagnetic (PM) metal to a Néel antiferromagnetic (AFM) Mott insulator, or to a nonmagnetic orbital insulator, depending on the competition of crystal field splitting and the Hund’s rule coupling. The AFM Mott insulating, PM metallic and orbital insulating phases are not, partially and fully orbital polarized, respectively. For a small
J
H
and a finite crystal field, the orbital insulator is robust. These results demonstrate that large crystal field splitting favors the formation of the orbital insulating phase, while large Hund’s rule coupling tends to destroy it, driving the low-spin to high-spin transition. |
| doi_str_mv | 10.1140/epjb/e2011-20613-0 |
| format | Article |
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J
H
and a finite crystal field, the orbital insulator is robust. These results demonstrate that large crystal field splitting favors the formation of the orbital insulating phase, while large Hund’s rule coupling tends to destroy it, driving the low-spin to high-spin transition.</description><identifier>ISSN: 1434-6028</identifier><identifier>EISSN: 1434-6036</identifier><identifier>DOI: 10.1140/epjb/e2011-20613-0</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer-Verlag</publisher><subject>Complex Systems ; Condensed Matter Physics ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Crystal and ligand fields ; Electron states ; Exact sciences and technology ; Fluid- and Aerodynamics ; Level splitting and interactions ; Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) ; Magnetic properties and materials ; Magnetically ordered materials: other intrinsic properties ; Metal-insulator transitions and other electronic transitions ; Physics ; Physics and Astronomy ; Regular Article ; Solid State Physics</subject><ispartof>The European physical journal. B, Condensed matter physics, 2012-02, Vol.85 (2), Article 55</ispartof><rights>EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2012</rights><rights>2015 INIST-CNRS</rights><rights>COPYRIGHT 2012 Springer</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c394t-605fb3aa587b9b551855639c1ad9955eb7d4c57bd917a6fe731f18e9e7c1697c3</citedby><cites>FETCH-LOGICAL-c394t-605fb3aa587b9b551855639c1ad9955eb7d4c57bd917a6fe731f18e9e7c1697c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1140/epjb/e2011-20613-0$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1140/epjb/e2011-20613-0$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51297</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25784344$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Quan, Y. M.</creatorcontrib><creatorcontrib>Zou, L. J.</creatorcontrib><creatorcontrib>Liu, D. Y.</creatorcontrib><creatorcontrib>Lin, H. Q.</creatorcontrib><title>Competition between crystal field splitting and Hund’s rule coupling in two-orbital magnetic metal-insulator transitions</title><title>The European physical journal. B, Condensed matter physics</title><addtitle>Eur. Phys. J. B</addtitle><description>Competition between crystal field splitting and Hund’s rule coupling in magnetic metal-insulator transitions of half-filled two-orbital Hubbard model is investigated by multi-orbital slave-boson mean field theory. We show that with the increase of Coulomb interaction, the system firstly transits from a paramagnetic (PM) metal to a Néel antiferromagnetic (AFM) Mott insulator, or to a nonmagnetic orbital insulator, depending on the competition of crystal field splitting and the Hund’s rule coupling. The AFM Mott insulating, PM metallic and orbital insulating phases are not, partially and fully orbital polarized, respectively. For a small
J
H
and a finite crystal field, the orbital insulator is robust. These results demonstrate that large crystal field splitting favors the formation of the orbital insulating phase, while large Hund’s rule coupling tends to destroy it, driving the low-spin to high-spin transition.</description><subject>Complex Systems</subject><subject>Condensed Matter Physics</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Crystal and ligand fields</subject><subject>Electron states</subject><subject>Exact sciences and technology</subject><subject>Fluid- and Aerodynamics</subject><subject>Level splitting and interactions</subject><subject>Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)</subject><subject>Magnetic properties and materials</subject><subject>Magnetically ordered materials: other intrinsic properties</subject><subject>Metal-insulator transitions and other electronic transitions</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Regular Article</subject><subject>Solid State Physics</subject><issn>1434-6028</issn><issn>1434-6036</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp9kclKxTAUhosoOL6Aq2xcuKgmTZO2S7k4gSA4rEOanpRc2qQkKQ4rX8PX80nMvVcEN5JFhvN_fw7nz7Jjgs8IKfE5TMv2HApMSF5gTmiOt7I9UtIy55jy7d9zUe9m-yEsMcaEk3Ive1-4cYJoonEWtRBfACxS_i1EOSBtYOhQmAYTo7E9krZDN7Ptvj4-A_LzAEi5OVVTyVgUX1zufGtW5Ch7m1wVGiFdc2PDPMjoPIpe2rD-LRxmO1oOAY5-9oPs-eryaXGT391f3y4u7nJFmzKmppluqZSsrtqmZYzUjHHaKCK7pmEM2qorFavariGV5BoqSjSpoYFKEd5Uih5kZxvfXg4gjNUuNaHS6mA0ylnQJr1fUMZqzouaJeD0D5A0EV5jL-cQxO3jw19tsdEq70LwoMXkzSj9myBYrKIRq2jEOhqxjkbgBJ1soEkGJQedZqJM-CULVtUprjLp6EYXUsn24MXSzd6mYf3n_g1F-6N8</recordid><startdate>20120201</startdate><enddate>20120201</enddate><creator>Quan, Y. 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M.</creatorcontrib><creatorcontrib>Zou, L. J.</creatorcontrib><creatorcontrib>Liu, D. Y.</creatorcontrib><creatorcontrib>Lin, H. Q.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Gale In Context: Science</collection><jtitle>The European physical journal. B, Condensed matter physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Quan, Y. M.</au><au>Zou, L. J.</au><au>Liu, D. Y.</au><au>Lin, H. Q.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Competition between crystal field splitting and Hund’s rule coupling in two-orbital magnetic metal-insulator transitions</atitle><jtitle>The European physical journal. B, Condensed matter physics</jtitle><stitle>Eur. Phys. J. B</stitle><date>2012-02-01</date><risdate>2012</risdate><volume>85</volume><issue>2</issue><artnum>55</artnum><issn>1434-6028</issn><eissn>1434-6036</eissn><abstract>Competition between crystal field splitting and Hund’s rule coupling in magnetic metal-insulator transitions of half-filled two-orbital Hubbard model is investigated by multi-orbital slave-boson mean field theory. We show that with the increase of Coulomb interaction, the system firstly transits from a paramagnetic (PM) metal to a Néel antiferromagnetic (AFM) Mott insulator, or to a nonmagnetic orbital insulator, depending on the competition of crystal field splitting and the Hund’s rule coupling. The AFM Mott insulating, PM metallic and orbital insulating phases are not, partially and fully orbital polarized, respectively. For a small
J
H
and a finite crystal field, the orbital insulator is robust. These results demonstrate that large crystal field splitting favors the formation of the orbital insulating phase, while large Hund’s rule coupling tends to destroy it, driving the low-spin to high-spin transition.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><doi>10.1140/epjb/e2011-20613-0</doi></addata></record> |
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| subjects | Complex Systems Condensed Matter Physics Condensed matter: electronic structure, electrical, magnetic, and optical properties Crystal and ligand fields Electron states Exact sciences and technology Fluid- and Aerodynamics Level splitting and interactions Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) Magnetic properties and materials Magnetically ordered materials: other intrinsic properties Metal-insulator transitions and other electronic transitions Physics Physics and Astronomy Regular Article Solid State Physics |
| title | Competition between crystal field splitting and Hund’s rule coupling in two-orbital magnetic metal-insulator transitions |
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