In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 11B ( 1995-11-01), p. L1524-
Abstract:
Transmission electron-energy-loss spectra of the oxide superconductor Bi 2 Sr 2 CaCu 2 O 8 have been taken from perfect crystalline areas (100 nmφ) in an energy range of 0–60 eV at temperatures of 30 K, 100 K and 300 K. A peak at about 0.6 eV was observed at these temperatures instead of a peak at about 1 eV which was reported to be a free-carrier plasmon peak. The dielectric function derived from the loss-function indicates that the peak at about 0.6 eV can be attributed not to a collective excitation (plasmon) but to an interband transition. The electron density which contributes to the peak has been calculated to be 2 ×10 19 electron/cm 3 . The peaks and shoulders of the spectra (the loss-function) are assigned to individual interband transitions. The temperature dependence of ε 2 has been found around 2.5 eV and 5.5 eV.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.34.L1524
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1995
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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