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- Publisher Website: 10.1103/PhysRevB.58.13520
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Article: Theory of excitons in the insulating Cu-O2 plane
Title | Theory of excitons in the insulating Cu-O2 plane |
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Authors | |
Issue Date | 1998 |
Publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ |
Citation | Physical Review B (Condensed Matter), 1998, v. 58 n. 20, p. 13520-13525 How to Cite? |
Abstract | We use a local model to study the formation and the structure of the low-energy charge-transfer excitations in the insulating Cu-O2 plane. The elementary excitation is a bound exciton of spin singlet, consisting of a Cu+ and a neighboring spin singlet of Cu-O holes. The exciton can move through the lattice freely without disturbing the antiferromagnetic spin background, in contrast to the single hole motion. There are four eigenmodes of excitons with different symmetry. The p-wave-like exciton has a large dispersion width. The s-wave-like exciton mixes with the p state at finite momentum, and its dipole transition intensity is strongly anisotropic. The model is in excellent agreement with the electron energy-loss spectra in the insulating Sr2CuO2Cl2. |
Persistent Identifier | http://hdl.handle.net/10722/174619 |
ISSN | |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhang, FC | en_US |
dc.contributor.author | Ng, KK | en_US |
dc.date.accessioned | 2012-11-26T08:46:33Z | - |
dc.date.available | 2012-11-26T08:46:33Z | - |
dc.date.issued | 1998 | en_US |
dc.identifier.citation | Physical Review B (Condensed Matter), 1998, v. 58 n. 20, p. 13520-13525 | - |
dc.identifier.issn | 0163-1829 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/174619 | - |
dc.description.abstract | We use a local model to study the formation and the structure of the low-energy charge-transfer excitations in the insulating Cu-O2 plane. The elementary excitation is a bound exciton of spin singlet, consisting of a Cu+ and a neighboring spin singlet of Cu-O holes. The exciton can move through the lattice freely without disturbing the antiferromagnetic spin background, in contrast to the single hole motion. There are four eigenmodes of excitons with different symmetry. The p-wave-like exciton has a large dispersion width. The s-wave-like exciton mixes with the p state at finite momentum, and its dipole transition intensity is strongly anisotropic. The model is in excellent agreement with the electron energy-loss spectra in the insulating Sr2CuO2Cl2. | en_US |
dc.language | eng | en_US |
dc.publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | en_US |
dc.relation.ispartof | Physical Review B (Condensed Matter) | - |
dc.title | Theory of excitons in the insulating Cu-O2 plane | en_US |
dc.type | Article | en_US |
dc.identifier.email | Zhang, FC: fuchun@hkucc.hku.hk | en_US |
dc.identifier.authority | Zhang, FC=rp00840 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1103/PhysRevB.58.13520 | - |
dc.identifier.scopus | eid_2-s2.0-0000775135 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-0000775135&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 58 | en_US |
dc.identifier.issue | 20 | en_US |
dc.identifier.spage | 13520 | en_US |
dc.identifier.epage | 13525 | en_US |
dc.identifier.isi | WOS:000077279800045 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Zhang, FC=14012468800 | en_US |
dc.identifier.scopusauthorid | Ng, KK=7403178987 | en_US |
dc.identifier.issnl | 0163-1829 | - |