Josephson tunneling through Ge-Sn barriers
Conference
·
· AIP Conf. Proc.; (United States)
OSTI ID:5256236
Josephson tunneling has been observed through thick (--600A) barriers of coevaporated Ge-Sn mixtures. The barrier transparency can be adjusted by altering the ratio of the mixture components: for a given barrier thickness critical current densities have been varied over six orders of magnitude. In addition, the critical current density can be controlled by varying barrier thickness. For thick barriers, or barriers with low Sn content, high tunneling resistances and no supercurrent result. Barriers of intermediate thickness or moderate Sn content yield junctions with electrical properties very similar to conventional hysteretic oxide-barrier junctions. Thin or high Sn-content barriers give junctions with non-hysteretic I-V characteristics similar to those of a superconducting microbridge.
- Research Organization:
- Bell Lab., Holmdel, NJ
- OSTI ID:
- 5256236
- Report Number(s):
- CONF-780339-
- Conference Information:
- Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 44
- Country of Publication:
- United States
- Language:
- English
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