PLASMON DISPERSION AND THE DIELECTRIC FUNCTION IN YBA2CU4O8 SINGLE-CRYSTALS

被引：15
|
作者：
KNUPFER, M
ROTH, G
FINK, J
KARPINSKI, J
KALDIS, E
机构：
[1] IFW DRESDEN EV, INST FESTKORPERFORSCH, D-01171 DRESDEN, GERMANY
[2] ETH ZURICH, FESTKORPERPHYS LAB, CH-8093 ZURICH, SWITZERLAND
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1994年 / 230卷 / 1-2期
关键词：
D O I：
10.1016/0921-4534(94)90453-7
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Electron energy-loss spectroscopy studies have been performed in order to investigate the in-plane loss function between 0 and 50 eV and the plasmon dispersion of YBa2Cu4O8 Single crystals. Strongly anisotropic dielectric functions and plasmon frequencies have been observed. The plasmon dispersion has been found to be quadratic, with an a-b anisotropy of about two. The Fermi velocity and the effective mass of the charge carriers could be derived.
引用
收藏
页码：121 / 127
页数：7
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