Low-frequency plasma in cuprate superconductors and related phenomena

Masashi Tachiki; Saburo Takahashi; Tomio Koyama

doi:10.1117/12.179159

29 June 1994 Low-frequency plasma in cuprate superconductors and related phenomena

Masashi Tachiki, Saburo Takahashi, Tomio Koyama

Proceedings Volume 2157, Superconducting Superlattices and Multilayers; (1994) https://doi.org/10.1117/12.179159
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

The frequency of the plasma with the c axis polarization in the cuprate superconductors is extremely low and it is lower than the superconducting energy gap in some cuprate. Electromagnetic phenomena caused by the excitation of the plasma are theoretically studied. The light passing through a film of the cuprate superconductor strongly interacts with the transverse component of the plasma. The interference effect of the plasma waves reflected at both sides of the film causes the oscillatory frequency dependence of the reflectivity and transmissivity. When vortices are introduced by an external magnetic field, the vortex motion and the gapless excitation inside the vortex normal cores make the reflectivity and transmissivity strongly field dependent. When a static voltage is applied to a Josephson junction of the cuprate superconductor, the plasma is excited by the ac Josephson effect and the excited plasma decays by emitting light. The excited plasma brings about an anomalous current-voltage characteristics in a weak magnetic field.

Citation Download Citation

Masashi Tachiki, Saburo Takahashi, and Tomio Koyama "Low-frequency plasma in cuprate superconductors and related phenomena", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); https://doi.org/10.1117/12.179159

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KEYWORDS

Plasma

Superconductors

Reflectivity

Magnetism

Dielectrics

Radio propagation

Crystals

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