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Self-doping process...
Self-doping processes between planes and chains in the metal-to-superconductor transition of YBa2Cu3O6.9
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- Magnuson, Martin (författare)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan,Linköping University
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- Schmitt, Thorsten (författare)
- Paul Scherrer Institut, Swiss Light Source (SLS), Villigen, Switzerland
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- Strocov, Vladimir N. (författare)
- Paul Scherrer Institut, Swiss Light Source (SLS), Villigen, Switzerland
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- Schlappa, Justina (författare)
- Paul Scherrer Institut, Swiss Light Source (SLS), Villigen, Switzerland,Helmholtz Zentrum,Helmholtz Center
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- Kalaboukhov, Alexei, 1975 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Duda, Laurent-Claudius, 1965- (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik,Uppsala University, Sweden
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- Kalabukhov, Alex (författare)
- Chalmers University of Technology, Gothenburg, Sweden
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(creator_code:org_t)
- 2014-11-12
- 2014
- Engelska.
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 4, s. 7017-
- Relaterad länk:
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The interplay between the quasi 1-dimensional CuO-chains and the 2-dimensional CuO2 planes of YBa2Cu3O61x (YBCO) has been in focus for a long time. Although the CuO-chains are known to be important as charge reservoirs that enable superconductivity for a range of oxygen doping levels in YBCO, the understanding of the dynamics of its temperature-driven metal-superconductor transition (MST) remains a challenge. We present a combined study using x-ray absorption spectroscopy and resonant inelastic x-ray scattering (RIXS) revealing how a reconstruction of the apical O(4)-derived interplanar orbitals during the MST of optimally doped YBCO leads to substantial hole-transfer from the chains into the planes, i.e. self-doping. Our ionic model calculations show that localized divalent charge-transfer configurations are expected to be abundant in the chains of YBCO. While these indeed appear in the RIXS spectra from YBCO in the normal, metallic, state, they are largely suppressed in the superconducting state and, instead, signatures of Cu trivalent charge-transfer configurations in the planes become enhanced. In the quest for understanding the fundamental mechanism for high-Tc-superconductivity (HTSC) in perovskite cuprate materials, the observation of such an interplanar self-doping process in YBCO opens a unique novel channel for studying the dynamics of HTSC.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- high temperature superconductor
- resonant inelastic x-ray scattering
- x-ray absorption spectroscopy
- Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik
- Physics with spec. in Atomic, Molecular and Condensed Matter Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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