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Probing the singlet character of the two-hole states in cuprate superconductors
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2002 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, Vol. 312, 34-35 p.Article in journal (Refereed) Published
Abstract [en]

Using spin-resolved resonant photoemission we have probed the singlet vs. triplet character of the two-hole state in the layered cuprates Bi2Sr2CaCu2O8+delta La2-xSrxCuO4 and Sr2CuO2Cl2. The combination of the photon circular polarization with the photoelectron spin detection gives access to the character of the photoemission final states, which correspond to the two-hole configurations localized at a (CuO4) site. In particular, the lowest energy state is found to have a very high singlet character in all the measured compounds. This can be considered as a strong indication of the existence and stability of the so-called Zhang-Rice singlets in the layered cuprates.

Place, publisher, year, edition, pages
2002. Vol. 312, 34-35 p.
Keyword [en]
Zhang-rice singlet, cuprate, photoemission, spin
Identifiers
URN: urn:nbn:se:kth:diva-21581ISI: 000175871000011OAI: oai:DiVA.org:kth-21581DiVA: diva2:340279
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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Microelectronics and Information Technology, IMIT
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