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X-ray photoelectron spectroscopy and nuclear magnetic resonance as complementary probes of pseudogaps and spin-charge separation

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UNSPECIFIED (2000) X-ray photoelectron spectroscopy and nuclear magnetic resonance as complementary probes of pseudogaps and spin-charge separation. JOURNAL OF PHYSICS-CONDENSED MATTER, 12 (31). pp. 7045-7054. ISSN 0953-8984.

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Abstract

The possibility that strongly correlated many-electron systems may exhibits pin-charge separation has generated great excitement, particularly in the light of recent experiments on low-dimensional conductors and high-temperature superconductors. However, finding experimental support for this hypothesis has been made difficult by the fact that most commonly used probes couple simultaneously to spin and charge excitations. We argue that core-hole photoemission (XPS)/nuclear magnetic resonance (NMR) couple independently and in exactly comparable ways to the local charge/spin susceptibilities of the system being measured. The explicit comparison of XPS and NMR data, particularly for systems which exhibit a pseudogap, may therefore yield fresh evidence for the existence (or non-existence) of spin-charge separation. Application of these ideas to the normal state of high-temperature superconductors is discussed, and the application is further illustrated in some detail for quasi-one-dimensional systems with charge-density waves.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: JOURNAL OF PHYSICS-CONDENSED MATTER
Publisher: IOP PUBLISHING LTD
ISSN: 0953-8984
Official Date: 7 August 2000
Dates:
DateEvent
7 August 2000UNSPECIFIED
Volume: 12
Number: 31
Number of Pages: 10
Page Range: pp. 7045-7054
Publication Status: Published

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