Published September 1, 1989
| Version v1
Journal article
Quasiparticle density of states in the perpendicular direction to the Cu-O planes in YBa2Cu3O7-x single-crystal thin films
- 1. Institute for Chemical Research, Kyoto University, Uji 611, Japan (Japan)
- 2. Department of Mathematics and Physics, The National Defense Academy, Yokosuka 239, Japan
- 3. Research Institute for Production Development, Kyoto 606, Japan
Description
Tunneling spectra were observed in normal-metal--insulator--superconductor junctions fabricated from single-crystal films of YBa2Cu3O7-x(001), epitaxially grown on SrTiO3(100). The quasiparticle density of states observed in the perpendicular direction to the Cu-O planes exhibits a lifetime broadening picture of quasiparticles at the gap edges. The broadening parameter increases with an increase of the temperature. The recombination lifetime at 60 K is estimated to be 10-13 s. A gap parameter Δperpendicular(4.6 K) of 9.0±1.8 meV and a coupling constant of (2.4±0.5)<2Δperpendicular (0)/kTc <(3.5±0.7) were obtained
Additional details
Publishing Information
- Journal Title
- Physical Review, B: Condensed Matter
- Journal Volume
- 40
- Journal Issue
- 7
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 4478-4481
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21013679
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; ENERGY GAP; ENERGY-LEVEL DENSITY; LIFETIME; MONOCRYSTALS; QUASI PARTICLES; RECOMBINATION; SUPERCONDUCTING JUNCTIONS; TEMPERATURE DEPENDENCE; THIN FILMS; VERY LOW TEMPERATURE; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; FILMS; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS