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Novel Composite Particles in Superconductor–Semiconductor–Superconductor Junction
Author(s) -
Inoue Ryotaro,
Takayanagi Hideaki
Publication year - 2012
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201103054
Subject(s) - superconductivity , quasiparticle , condensed matter physics , materials science , superlattice , polaron , josephson effect , semiconductor , phonon , coupling (piping) , optoelectronics , physics , quantum mechanics , composite material , electron
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.