Frank Stem
C R C Critical Reviews in Solid State Sciences
Conductance measurements between two superconducting electrodes with different gap energies Δ1 and Δ2 were performed with a low-temperature scanning tunneling microscope. The temperature dependence and tip-sample distance dependence of the spectra show a pronounced subgap structure which is interpreted as multiple Andreev reflections (MARs). Low temperature conductance peaks not seen in symmetric superconducting tunnel junctions arise at energies ± Δ1 - Δ2 when the superconducting gaps are sufficiently different. We propose an explanation of these findings by extending the full counting statistics of MARs to describe these asymmetric junctions. © 2006 The American Physical Society.
Frank Stem
C R C Critical Reviews in Solid State Sciences
Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
Shaoning Yao, Wei-Tsu Tseng, et al.
ADMETA 2011
T.N. Morgan
Semiconductor Science and Technology