Published November 1, 1993
| Version v1
Journal article
Surface phonons on Bi2Sr2CaCu2O8+δ
- 1. Physics Department and Materials Research Institute, Indiana University, Bloomington, Indiana 47405 (United States)
- 2. IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (United States)
Description
We report measurements of surface optical phonons on Bi2Sr2CaCu2O8+δ with high-resolution electron-energy-loss spectroscopy (HREELS). In addition to peaks near 50 and 80 meV (403 and 645 cm-1), which have been previously observed, our loss spectra exhibit a peak at 26 meV (210 cm-1). Loss spectra were measured at temperatures from 45 to 146 K, and the temperature dependence of the peaks was found to be weak. The 50 and 80 meV peaks shift to lower frequency by ∼1.5 meV over this temperature range. All three peaks are attributed to surface optical phonons. The identification of particular bulk modes corresponding to the surface modes observed with HREELS is discussed
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 48
- Journal Issue
- 17
- Journal Page Range
- p. 12936-12940.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 25014240
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; ENERGY-LOSS SPECTROSCOPY; HIGH-TC SUPERCONDUCTORS; PHONONS; STRONTIUM OXIDES; SURFACE PROPERTIES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; QUASI PARTICLES; SPECTROSCOPY; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS