File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1103/PhysRevB.78.094403
- Scopus: eid_2-s2.0-51749122619
- WOS: WOS:000259689700049
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Spin-orbit effects in Na4 Ir3 O8: A hyper-kagome lattice antiferromagnet
Title | Spin-orbit effects in Na4 Ir3 O8: A hyper-kagome lattice antiferromagnet |
---|---|
Authors | |
Issue Date | 2008 |
Publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prb/ |
Citation | Physical Review B (Condensed Matter and Materials Physics), 2008, v. 78 n. 9, article no. 094403 How to Cite? |
Abstract | We consider spin-orbit coupling effects in Na4 Ir3 O8, a material in which Ir4+ spins form an hyper-kagome lattice, a three-dimensional network of corner-sharing triangles. We argue that both low-temperature thermodynamic measurements and the impurity susceptibility induced by dilute substitution of Ti for Ir are suggestive of significant spin-orbit effects. Because of uncertainties in the crystal-field parameters, we consider two limits in which the spin-orbit coupling is either weak or strong compared to the noncubic atomic splittings. A semi-microscopic calculation of the exchange Hamiltonian confirms that indeed large antisymmetric Dzyaloshinskii-Moriya (DM) and/or symmetric exchange anisotropy may be present. In the strong spin-orbit limit, the Ir-O-Ir superexchange contribution consists of unfrustrated strong symmetric exchange anisotropy, and we suggest that spin-liquid behavior is unlikely. In the weak spin-orbit limit, and for strong spin-orbit and direct Ir-Ir exchange, the Hamiltonian consists of Heisenberg and DM interactions. The DM coupling is parametrized by a three-component DM vector (which must be determined empirically). For a range of orientation of this vector, frustration is relieved and an ordered state occurs. For other orientations, even the classical ground states are very complex. We perform spin-wave and exact diagonalization calculations, which suggest the persistence of a quantum spin liquid in the latter regime. Applications to Na4 Ir3 O8 and broader implications are discussed. © 2008 The American Physical Society. |
Persistent Identifier | http://hdl.handle.net/10722/266112 |
ISSN | 2014 Impact Factor: 3.736 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chen, Gang | - |
dc.contributor.author | Balents, Leon | - |
dc.date.accessioned | 2018-12-27T01:58:53Z | - |
dc.date.available | 2018-12-27T01:58:53Z | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Physical Review B (Condensed Matter and Materials Physics), 2008, v. 78 n. 9, article no. 094403 | - |
dc.identifier.issn | 1098-0121 | - |
dc.identifier.uri | http://hdl.handle.net/10722/266112 | - |
dc.description.abstract | We consider spin-orbit coupling effects in Na4 Ir3 O8, a material in which Ir4+ spins form an hyper-kagome lattice, a three-dimensional network of corner-sharing triangles. We argue that both low-temperature thermodynamic measurements and the impurity susceptibility induced by dilute substitution of Ti for Ir are suggestive of significant spin-orbit effects. Because of uncertainties in the crystal-field parameters, we consider two limits in which the spin-orbit coupling is either weak or strong compared to the noncubic atomic splittings. A semi-microscopic calculation of the exchange Hamiltonian confirms that indeed large antisymmetric Dzyaloshinskii-Moriya (DM) and/or symmetric exchange anisotropy may be present. In the strong spin-orbit limit, the Ir-O-Ir superexchange contribution consists of unfrustrated strong symmetric exchange anisotropy, and we suggest that spin-liquid behavior is unlikely. In the weak spin-orbit limit, and for strong spin-orbit and direct Ir-Ir exchange, the Hamiltonian consists of Heisenberg and DM interactions. The DM coupling is parametrized by a three-component DM vector (which must be determined empirically). For a range of orientation of this vector, frustration is relieved and an ordered state occurs. For other orientations, even the classical ground states are very complex. We perform spin-wave and exact diagonalization calculations, which suggest the persistence of a quantum spin liquid in the latter regime. Applications to Na4 Ir3 O8 and broader implications are discussed. © 2008 The American Physical Society. | - |
dc.language | eng | - |
dc.publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prb/ | - |
dc.relation.ispartof | Physical Review B (Condensed Matter and Materials Physics) | - |
dc.title | Spin-orbit effects in Na4 Ir3 O8: A hyper-kagome lattice antiferromagnet | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1103/PhysRevB.78.094403 | - |
dc.identifier.scopus | eid_2-s2.0-51749122619 | - |
dc.identifier.volume | 78 | - |
dc.identifier.issue | 9 | - |
dc.identifier.spage | article no. 094403 | - |
dc.identifier.epage | article no. 094403 | - |
dc.identifier.eissn | 1550-235X | - |
dc.identifier.isi | WOS:000259689700049 | - |
dc.identifier.issnl | 1098-0121 | - |