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Novel Composite Particles in Superconductor–Semiconductor–Superconductor Junction

✍ Scribed by Ryotaro Inoue; Hideaki Takayanagi

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
911 KB
Volume
24
Category
Article
ISSN
0935-9648

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✦ Synopsis

Abstract

In superconductor–semiconductor–superconductor (Su–Sm–Su) junctions with superlattice structure, differential resistance as a function of voltage shows oscillatory behavior under the irradiation of radio‐frequency (rf) waves with specific frequency regardless of the superconducting materials and the junction geometries. We interpret quantitatively this newly discovered phenomenon in terms of the coupling of superconducting quasiparticles with long‐wavelength acoustic phonons indirectly excited by the rf waves. We propose that the strong coupling causes the formation of novel composite particles which we named Andreev polarons.

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✍ Hideaki Takayanagi; Etsuko Toyoda; Tatsushi Akazaki 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 509 KB

Measurements of superconducting and normal transport in a superconductor/semiconductor/superconductor junction with a long-split gate show that when the two-dimensional electron gas in the semiconductor is put into the pinched-off state by applying a gate voltage, the two superconducting electrodes