Nonmagnetic Ground States and a Possible Quadrupolar Phase in 4d and 5d Lacunar Spinel Selenides Ga M4Se8 (M = Nb , Ta)
Structural and magnetic properties of cubic spinel selenides Ga M4 Se8 (M = Nb , Ta), which are candidates for the molecular Jeff = 3/2 Mott insulators, are investigated. The effective magnetic moments are reduced compared to the spin only value, indicating the presence of sizable spin-orbit couplin...
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| Veröffentlicht in: | Physical review letters 2020-06, Vol.124 (22), p.1 |
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| creator | Ishikawa, Hajime Yajima, Takeshi Matsuo, Akira Ihara, Yoshihiko Kindo, Koichi |
| description | Structural and magnetic properties of cubic spinel selenides Ga M4 Se8 (M = Nb , Ta), which are candidates for the molecular Jeff = 3/2 Mott insulators, are investigated. The effective magnetic moments are reduced compared to the spin only value, indicating the presence of sizable spin-orbit coupling. GaNb4 Se8 and GaTa4 Se8 exhibit phase transitions into the nonmagnetic ground states with orthorhombic and tetragonal structures, respectively, which are robust against magnetic field up to at least 60 T. A cubic-cubic phase transition is observed in GaNb4Se8 preceding the magnetic transition, suggesting the existence of a quadrupolar-ordered phase theoretically predicted in the Jeff = 3/2 Mott insulator. |
| doi_str_mv | 10.1103/PhysRevLett.124.227202 |
| format | Article |
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The effective magnetic moments are reduced compared to the spin only value, indicating the presence of sizable spin-orbit coupling. GaNb4 Se8 and GaTa4 Se8 exhibit phase transitions into the nonmagnetic ground states with orthorhombic and tetragonal structures, respectively, which are robust against magnetic field up to at least 60 T. A cubic-cubic phase transition is observed in GaNb4Se8 preceding the magnetic transition, suggesting the existence of a quadrupolar-ordered phase theoretically predicted in the Jeff = 3/2 Mott insulator.</description><identifier>ISSN: 0031-9007</identifier><identifier>EISSN: 1079-7114</identifier><identifier>DOI: 10.1103/PhysRevLett.124.227202</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Coupling (molecular) ; Ground state ; Insulators ; Magnetic moments ; Magnetic properties ; Magnetic transitions ; Magnetism ; Niobium ; Phase transitions ; Selenides ; Spin-orbit interactions ; Spinel ; Tantalum</subject><ispartof>Physical review letters, 2020-06, Vol.124 (22), p.1</ispartof><rights>Copyright American Physical Society Jun 5, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Ishikawa, Hajime</creatorcontrib><creatorcontrib>Yajima, Takeshi</creatorcontrib><creatorcontrib>Matsuo, Akira</creatorcontrib><creatorcontrib>Ihara, Yoshihiko</creatorcontrib><creatorcontrib>Kindo, Koichi</creatorcontrib><title>Nonmagnetic Ground States and a Possible Quadrupolar Phase in 4d and 5d Lacunar Spinel Selenides Ga M4Se8 (M = Nb , Ta)</title><title>Physical review letters</title><description>Structural and magnetic properties of cubic spinel selenides Ga M4 Se8 (M = Nb , Ta), which are candidates for the molecular Jeff = 3/2 Mott insulators, are investigated. The effective magnetic moments are reduced compared to the spin only value, indicating the presence of sizable spin-orbit coupling. GaNb4 Se8 and GaTa4 Se8 exhibit phase transitions into the nonmagnetic ground states with orthorhombic and tetragonal structures, respectively, which are robust against magnetic field up to at least 60 T. A cubic-cubic phase transition is observed in GaNb4Se8 preceding the magnetic transition, suggesting the existence of a quadrupolar-ordered phase theoretically predicted in the Jeff = 3/2 Mott insulator.</description><subject>Coupling (molecular)</subject><subject>Ground state</subject><subject>Insulators</subject><subject>Magnetic moments</subject><subject>Magnetic properties</subject><subject>Magnetic transitions</subject><subject>Magnetism</subject><subject>Niobium</subject><subject>Phase transitions</subject><subject>Selenides</subject><subject>Spin-orbit interactions</subject><subject>Spinel</subject><subject>Tantalum</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqNjM1Kw0AURgdRMP68glxwo2DjvZO0ky5cidZFW6Lpvtw2V5sSZ2JmRvHtDeIDuPoOnMOn1AVhSoTZbbn79i_yOZcQUtJ5qrXRqA9UQmimI0OUH6oEMaPRFNEcqxPv94hIelIk6mvp7Du_WQnNFma9i7aGKnAQDzwgQ-m8bzatwHPkuo-da7mHcsdeoLGQ17_ZuIY5b6MdVNU1VlqopBXb1MPNjGGRV1LA1QLuYLmBG1jx9Zk6euXWy_nfnqrLx4fV_dOo691HFB_Wexd7O6i1zolMkZnJOPtf9QPkZlKN</recordid><startdate>20200605</startdate><enddate>20200605</enddate><creator>Ishikawa, Hajime</creator><creator>Yajima, Takeshi</creator><creator>Matsuo, Akira</creator><creator>Ihara, Yoshihiko</creator><creator>Kindo, Koichi</creator><general>American Physical Society</general><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20200605</creationdate><title>Nonmagnetic Ground States and a Possible Quadrupolar Phase in 4d and 5d Lacunar Spinel Selenides Ga M4Se8 (M = Nb , Ta)</title><author>Ishikawa, Hajime ; Yajima, Takeshi ; Matsuo, Akira ; Ihara, Yoshihiko ; Kindo, Koichi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_24117837653</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Coupling (molecular)</topic><topic>Ground state</topic><topic>Insulators</topic><topic>Magnetic moments</topic><topic>Magnetic properties</topic><topic>Magnetic transitions</topic><topic>Magnetism</topic><topic>Niobium</topic><topic>Phase transitions</topic><topic>Selenides</topic><topic>Spin-orbit interactions</topic><topic>Spinel</topic><topic>Tantalum</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ishikawa, Hajime</creatorcontrib><creatorcontrib>Yajima, Takeshi</creatorcontrib><creatorcontrib>Matsuo, Akira</creatorcontrib><creatorcontrib>Ihara, Yoshihiko</creatorcontrib><creatorcontrib>Kindo, Koichi</creatorcontrib><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ishikawa, Hajime</au><au>Yajima, Takeshi</au><au>Matsuo, Akira</au><au>Ihara, Yoshihiko</au><au>Kindo, Koichi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nonmagnetic Ground States and a Possible Quadrupolar Phase in 4d and 5d Lacunar Spinel Selenides Ga M4Se8 (M = Nb , Ta)</atitle><jtitle>Physical review letters</jtitle><date>2020-06-05</date><risdate>2020</risdate><volume>124</volume><issue>22</issue><spage>1</spage><pages>1-</pages><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>Structural and magnetic properties of cubic spinel selenides Ga M4 Se8 (M = Nb , Ta), which are candidates for the molecular Jeff = 3/2 Mott insulators, are investigated. The effective magnetic moments are reduced compared to the spin only value, indicating the presence of sizable spin-orbit coupling. GaNb4 Se8 and GaTa4 Se8 exhibit phase transitions into the nonmagnetic ground states with orthorhombic and tetragonal structures, respectively, which are robust against magnetic field up to at least 60 T. A cubic-cubic phase transition is observed in GaNb4Se8 preceding the magnetic transition, suggesting the existence of a quadrupolar-ordered phase theoretically predicted in the Jeff = 3/2 Mott insulator.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevLett.124.227202</doi></addata></record> |
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| source | American Physical Society Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Coupling (molecular) Ground state Insulators Magnetic moments Magnetic properties Magnetic transitions Magnetism Niobium Phase transitions Selenides Spin-orbit interactions Spinel Tantalum |
| title | Nonmagnetic Ground States and a Possible Quadrupolar Phase in 4d and 5d Lacunar Spinel Selenides Ga M4Se8 (M = Nb , Ta) |
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