4 papers
InAs-AlSb quantum wells in tilted magnetic fields
S. Brosig, K. Ensslin, A. G. Jansen +4
InAs-AlSb quantum wells are investigated by transport experiments in magnetic fields tilted with respect to the sample normal. Using the coincidence method we find for magnetic fie…
Zero-field spin splitting in InAs-AlSb quantum wells revisited
S. Brosig, K. Ensslin, R. J. Warburton +4
We present magnetotransport experiments on high-quality InAs-AlSb quantum wells that show a perfectly clean single-period Shubnikov-de Haas oscillation down to very low magnetic fi…
Nonequilibrium ac Josephson effect in mesoscopic Nb-InAs-Nb junctions
K. W. Lehnert, N. Argaman, H. -R. Blank +4
Microwave irradiation of Nb-InAs-Nb junctions reveals frequency-doubled Josephson currents which persist to high temperatures, in the absence of a critical current. A nonequilibriu…
Current-voltage characteristics of semiconductor-coupled superconducting weak links with large electrode separations
M. Thomas, H. R. Blank, K. C. Wong +2
We have studied the current-voltage characteristics of superconducting weak links in which the coupling medium is the 2-D electron gas in InAs-based semiconductor quantum wells, wi…