Seeing Stripes: Competition and Complexity in High-Temperature Superconductors
- BNL
Superconductivity in layered copper-oxide compounds is remarkable not only because it survives to relatively high temperatures, but especially because it appears when mobile charge carriers are doped into a parent antiferromagnetic insulator. The tendency of the carriers to reduce their kinetic energy by delocalizing competes with the magnetic superexchange between spins on copper ions. One possible consequence of this competition is the segregation of carriers into charge stripes that separate antiferromagnetic domains. An ordered stripe phase has been observed by diffraction experiments in a few special cuprate compounds, and stripe order is found to compete with superconductivity. It has been proposed that quantum-disordered stripes might underlie the superconducting phase. Such a concept clashes with the conventional picture of electronic structure in solids. Some of the challenges of experimentally 'seeing' both static and fluctuating stripes will be discussed.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-ACO2-06CH11357
- OSTI ID:
- 1006209
- Resource Relation:
- Conference: APS Colloquium Series, Advanced Photon Source (APS) at Argonne National Laboratory, Argonne, Illinois (United States), presented on December 01, 2004
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETIC MATERIALS
CHARGE CARRIERS
CHARGE DENSITY
COPPER COMPOUNDS
COPPER IONS
CUPRATES
DIFFRACTION
DOMAIN STRUCTURE
DOPED MATERIALS
ELECTRONIC STRUCTURE
LAYERS
KINETIC ENERGY
OXIDES
SEGREGATION
SPIN
SUPERCONDUCTIVITY
HIGH-TC SUPERCONDUCTORS