OBSERVATION OF BELOW-GAP PLASMON EXCITATIONS IN SUPERCONDUCTING YBA2CU3O7 FILMS

被引：29

作者：

DUNMORE, FJ

LIU, DZ

DREW, HD

DASSARMA, S

LI, Q

FENNER, DB

机构：

[1] LAB PHYS SCI, COLLEGE PK, MD 20740 USA

[2] ADV FUEL RES INC, E HARTFORD, CT 06138 USA

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.52.R731

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Finite-wave-vector collective plasmon resonances have been observed in far-infrared transmission measurements on superconducting YBa2Cu3O7 films. An Al grating is used to couple IR radiation to collective two-dimensional plasma modes. The plasmon dispersion, measured by using different grating periods, spans the frequency range of the energy gap. The strengths of the plasma resonances weaken as the temperature approaches T-c from below. The results are analyzed using a grating coupler theory that includes the hybridization of the plasmons with the diffraction modes.

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收藏

页码：R731 / R734

页数：4

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