Observation of the transverse optical plasmon in SmLa0.8Sr0.2CuO4-δ

被引:49
作者
Dulic, D
Pimenov, A
van der Marel, D
Broun, DM
Kamal, S
Hardy, WN
Tsvetkov, AA
Sutjaha, IM
Liang, RX
Menovsky, AA
Loidl, A
Saxena, SS
机构
[1] Univ Groningen, Ctr Mat Sci, Solid State Phys Lab, NL-9747 AG Groningen, Netherlands
[2] Univ Augsburg, D-86135 Augsburg, Germany
[3] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[4] Univ Cambridge, Cavendish Lab, Interdisciplinary Res Ctr Superconduct, Cambridge CB3 0HE, England
[5] Univ Cambridge, Cavendish Lab, Dept Phys, Cambridge CB3 0HE, England
[6] Univ Amsterdam, Van Waals Zeeman Inst, NL-1012 WX Amsterdam, Netherlands
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1103/PhysRevLett.86.4144
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present microwave and infrared measurements on SmLa0.8Sr0.2CuO4-delta, which are direct evidence for the existence of a transverse optical plasma mode, observed as a peak in the c-axis optical conductivity. This mode appears as a consequence of the existence of two different intrinsic Josephson couplings between the CuO2 layers, one with a Sm2O2 block layer, and the other one with a (La, Sr)(2)O2-delta block layer. From the frequencies and the intensities of the collective modes we determine the value of the compressibility of the two dimensional electron fluid in the copper oxygen planes.
引用
收藏
页码:4144 / 4147
页数:4
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