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Spin glass behavior in frustrated quantum spin system CuAl2O4 with a possible orbital liquid state
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Nirmala, R. | - |
dc.contributor.author | Jang, Kwang-Hyun | - |
dc.contributor.author | Sim, Hasung | - |
dc.contributor.author | Cho, Hwanbeom | - |
dc.contributor.author | Lee, Junghwan | - |
dc.contributor.author | Yang, Nam-Geun | - |
dc.contributor.author | Lee, Seongsu | - |
dc.contributor.author | Ibberson, R. M. | - |
dc.contributor.author | Kakurai, K. | - |
dc.contributor.author | Matsuda, M. | - |
dc.contributor.author | Cheong, S-W | - |
dc.contributor.author | Gapontsev, V. V. | - |
dc.contributor.author | Streltsov, S. V. | - |
dc.contributor.author | Park, Je-Geun | - |
dc.creator | 박제근 | - |
dc.date.accessioned | 2019-04-24T08:30:07Z | - |
dc.date.available | 2020-04-05T08:30:07Z | - |
dc.date.created | 2018-09-28 | - |
dc.date.created | 2018-09-28 | - |
dc.date.issued | 2017-04 | - |
dc.identifier.citation | Journal of Physics Condensed Matter, Vol.29 No.13, p. 13LT01 | - |
dc.identifier.issn | 0953-8984 | - |
dc.identifier.uri | https://hdl.handle.net/10371/147898 | - |
dc.description.abstract | CuAl2O4 is a normal spinel oxide having quantum spin, S = 1/2 for Cu2+. It is a rather unique feature that the Cu2+ ions of CuAl2O4 sit at a tetrahedral position, not like the usual octahedral position for many oxides. At low temperatures, it exhibits all the thermodynamic evidence of a quantum spin glass. For example, the polycrystalline CuAl2O4 shows a cusp centered at similar to 2 K in the low-field dc magnetization data and a clear frequency dependence in the ac magnetic susceptibility while it displays logarithmic relaxation behavior in a time dependence of the magnetization. At the same time, there is a peak at similar to 2.3 K in the heat capacity, which shifts towards a higher temperature with magnetic fields. On the other hand, there is no evidence of new superlattice peaks in the high-resolution neutron powder diffraction data when cooled from 40 to 0.4 K. This implies that there is no long-ranged magnetic order down to 0.4 K, thus confirming a spin glass-like ground state for CuAl2O4. Interestingly, there is no sign of structural distortion either although Cu2+ is a Jahn-Teller active ion. Thus, we claim that an orbital liquid state is the most likely ground state in CuAl2O4. Of further interest, it also exhibits a large frustration parameter, f = |theta(CW)/T-m| similar to 67, one of the largest values reported for spinel oxides. Our observations suggest that CuAl2O4 should be a rare example of a frustrated quantum spin glass with a good candidate for an orbital liquid state. | - |
dc.language | 영어 | - |
dc.language.iso | en | en |
dc.publisher | Institute of Physics Publishing | - |
dc.title | Spin glass behavior in frustrated quantum spin system CuAl2O4 with a possible orbital liquid state | - |
dc.type | Article | - |
dc.identifier.doi | 10.1088/1361-648X/aa5c72 | - |
dc.citation.journaltitle | Journal of Physics Condensed Matter | - |
dc.identifier.wosid | 000416513800001 | - |
dc.identifier.scopusid | 2-s2.0-85015229087 | - |
dc.description.srnd | OAIID:RECH_ACHV_DSTSH_NO:T201717555 | - |
dc.description.srnd | RECH_ACHV_FG:RR00200001 | - |
dc.description.srnd | ADJUST_YN: | - |
dc.description.srnd | EMP_ID:A078268 | - |
dc.description.srnd | CITE_RATE:2.617 | - |
dc.description.srnd | FILENAME:2017-232.pdf | - |
dc.description.srnd | DEPT_NM:물리·천문학부 | - |
dc.description.srnd | EMAIL:jgpark10@snu.ac.kr | - |
dc.description.srnd | SCOPUS_YN:Y | - |
dc.description.srnd | FILEURL:https://srnd.snu.ac.kr/eXrepEIR/fws/file/358e3b33-be63-48e9-98bc-135537485b6b/link | - |
dc.citation.number | 13 | - |
dc.citation.startpage | 13LT01 | - |
dc.citation.volume | 29 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Park, Je-Geun | - |
dc.identifier.srnd | T201717555 | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | MAGNETIC-PROPERTIES | - |
dc.subject.keywordPlus | LATTICE | - |
dc.subject.keywordPlus | ORDER | - |
dc.subject.keywordPlus | ICE | - |
dc.subject.keywordAuthor | quantum spin system | - |
dc.subject.keywordAuthor | frustration | - |
dc.subject.keywordAuthor | spin glass | - |
dc.subject.keywordAuthor | orbital liquid state | - |
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