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High-T Cuprates: a Story of Two Electronic Subsystems
1Department of Physics, Faculty of Science, University of Zagreb, Zagreb, 10000 Croatia.
Journal of Superconductivity and Novel Magnetism
|June 27, 2022
Summary
Cuprate superconductors feature two electronic subsystems, with itinerant holes showing universal Fermi liquid behavior across the phase diagram. This finding simplifies carrier density analysis and aids understanding of their superconducting properties.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Chemistry
Background:
- Cuprate superconductors exhibit complex electronic behavior.
- Understanding their phase diagram and superconducting mechanisms remains a key challenge.
- Microscopy and phenomenology offer insights into their properties.
Purpose of the Study:
- To review the phenomenology and microscopy of cuprate superconductors.
- To highlight universal conductance features and their implications.
- To present a compatible superconducting mechanism and explain the phase diagram.
Main Methods:
- Phenomenological analysis of conductance features.
- Microscopic examination of cuprate structures.
- Theoretical modeling of electronic subsystems and interactions.
Main Results:
- Identification of two distinct electronic subsystems in cuprates.
- Observation of universal Fermi liquid character in itinerant holes.
- Correlation between doping, delocalization of holes, and electronic behavior.
Conclusions:
- Universal behavior simplifies carrier density determination.
- A novel superconducting mechanism involves interactions between itinerant and localized holes.
- A shift in chemical bonding explains the cuprate phase diagram.
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