File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Phenomenological theory of spin excitations in La- and Y-based cuprates

TitlePhenomenological theory of spin excitations in La- and Y-based cuprates
Authors
Issue Date2007
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2007, v. 76 n. 9 How to Cite?
AbstractMotivated by recent inelastic neutron scattering experiments on La-based cuprates and based on the fermiology theories, we study the spin susceptibility for La-based (e.g., La2-x Srx Cu O4) and Y-based (e.g., Y Ba2 Cu3 Oy) cuprates, respectively. The spin excitation in Y Ba2 Cu3 Oy is dominated by a sharp resonance peak at the frequency 40 meV in the superconducting state. Below and above the resonance frequency, the incommensurate (IC) peaks develop and the intensity of the peaks decreases dramatically. In the normal state, the resonant excitation does not occur and the IC peaks are merged into commensurate ones. The spin excitation of La2-x Srx Cu O4 is significantly different from that of Y-based ones, namely, the resonance peak does not exist due to the decreasing of the superconducting gap and the presence of the possible spin-stripe order. The spectra are only enhanced at the expected resonance frequency (about 18 meV) while they are still incommensurate. On the other hand, another frequency scale is also revealed, namely, the spectra are commensurate and show local maximum at the frequency of 55 meV. We elaborate all the results based on the Fermi surface topology and the d -wave superconductivity and suggest that the spin-stripe order is also important in determining the spin excitation of La-based cuprates. A coherent picture for the spin excitations is presented for Y-based and La-based cuprates. © 2007 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/81076
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, Ten_HK
dc.contributor.authorWang, ZDen_HK
dc.date.accessioned2010-09-06T08:13:28Z-
dc.date.available2010-09-06T08:13:28Z-
dc.date.issued2007en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2007, v. 76 n. 9en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/81076-
dc.description.abstractMotivated by recent inelastic neutron scattering experiments on La-based cuprates and based on the fermiology theories, we study the spin susceptibility for La-based (e.g., La2-x Srx Cu O4) and Y-based (e.g., Y Ba2 Cu3 Oy) cuprates, respectively. The spin excitation in Y Ba2 Cu3 Oy is dominated by a sharp resonance peak at the frequency 40 meV in the superconducting state. Below and above the resonance frequency, the incommensurate (IC) peaks develop and the intensity of the peaks decreases dramatically. In the normal state, the resonant excitation does not occur and the IC peaks are merged into commensurate ones. The spin excitation of La2-x Srx Cu O4 is significantly different from that of Y-based ones, namely, the resonance peak does not exist due to the decreasing of the superconducting gap and the presence of the possible spin-stripe order. The spectra are only enhanced at the expected resonance frequency (about 18 meV) while they are still incommensurate. On the other hand, another frequency scale is also revealed, namely, the spectra are commensurate and show local maximum at the frequency of 55 meV. We elaborate all the results based on the Fermi surface topology and the d -wave superconductivity and suggest that the spin-stripe order is also important in determining the spin excitation of La-based cuprates. A coherent picture for the spin excitations is presented for Y-based and La-based cuprates. © 2007 The American Physical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.titlePhenomenological theory of spin excitations in La- and Y-based cupratesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=76&spage=094510: 1&epage=7&date=2007&atitle=Phenomenological+theory+of+spin+excitations+in+La-+and+Y-based+cupratesen_HK
dc.identifier.emailWang, ZD: zwang@hkucc.hku.hken_HK
dc.identifier.authorityWang, ZD=rp00802en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevB.76.094510en_HK
dc.identifier.scopuseid_2-s2.0-34548782121en_HK
dc.identifier.hkuros149788en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34548782121&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume76en_HK
dc.identifier.issue9en_HK
dc.identifier.isiWOS:000249786100080-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhou, T=36621605200en_HK
dc.identifier.scopusauthoridWang, ZD=14828459100en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats