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Detection of Zhang-Rice singlets using spin-polarized photoemission
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0001-8669-6886
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2001 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 8723, no 23Article in journal (Refereed) Published
Abstract [en]

From a spin-resolved photoemission study on the Bi2Sr2CaCu2O8+delta superconductor, we show experimentally that the first ionization state is of nearly pure singlet character. This is true both above and below the superconducting transition and in the presence of doping and band formation. This provides direct support for the existence and stability of Zhang-Rice singlets in high-temperature superconductors, justifying the ansatz of single-band models. Moreover, we establish this technique as an important probe for a wide range of cuprates and strongly correlated materials.

Place, publisher, year, edition, pages
2001. Vol. 8723, no 23
Keyword [en]
t-j model, resonant-photoemission, electronic-structure, superconductivity, stability, cuo, la2-xsrxcuo4, la2cuo4, states, oxides
Identifiers
URN: urn:nbn:se:kth:diva-21151ISI: 000172545400039OAI: oai:DiVA.org:kth-21151DiVA: diva2:339848
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Tjernberg, Oscar

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