Atomic-Layer Engineering of Oxide Superconductors
Molecular beam epitaxy technique has enabled synthesis of atomically smooth thin films, multilayers, and superlattices of cuprates and other complex oxides. Such heterostructures show high temperature superconductivity and enable novel experiments that probe the basic physics of this phenomenon. For example, it was established that high temperature superconductivity and anti-ferromagnetic phases separate on Angstrom scale, while the pseudo-gap state apparently mixes with high temperature superconductivity over an anomalously large length scale (the 'Giant Proximity Effect'). We review some recent experiments on such films and superlattices, including X-ray diffraction, atomic force microscopy, angle-resolved time of flight ion scattering and recoil spectroscopy, transport measurements, high resolution transmission electron microscopy, resonant X-ray scattering, low-energy muon spin resonance, and ultrafast photo-induced reflection high energy electron diffraction. The results include an unambiguous demonstration of strong coupling of in-plane charge excitations to out-of-plane lattice vibrations, a discovery of interface high temperature superconductivity that occurs in a single CuO{sub 2} plane, evidence for local pairs, and establishing tight limits on the temperature range of superconducting fluctuations.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1044730
- Report Number(s):
- BNL-97186-2012-JA; PSISDG; MA-509-MACA; TRN: US201214%%779
- Journal Information:
- Proceedings of SPIE - The International Society for Optical Engineering, Vol. 8263; ISSN 0277-786X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMIC FORCE MICROSCOPY
CUPRATES
ELECTRON DIFFRACTION
FLUCTUATIONS
LATTICE VIBRATIONS
MOLECULAR BEAM EPITAXY
MUON SPIN RELAXATION
OXIDES
PHYSICS
PROBES
REFLECTION
RESOLUTION
SCATTERING
SPECTROSCOPY
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SUPERLATTICES
SYNTHESIS
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION