MgB2 tunnel junctions and 19 K low-noise dc superconducting quantum interference devices
作者： D. Kinion , John Clarke , J. Chen , Y. Zhang , G. W. Crabtree
DOI: 10.1063/1.1424465
关键词:
摘要: Point contact junctions made from two pieces of MgB2 can be adjusted to exhibit either superconductor-insulator-superconductor (SIS) or superconductor-normal metal–superconductor (SNS) current–voltage characteristics. The SIS characteristics are in good agreement with the standard tunneling model for s-wave superconductors, and yield an energy gap (2.02±0.08) meV. SNS predictions resistively-shunted junction model. DC superconducting quantum interference devices magnetic flux field noise as low 4 μΦ0 Hz−1/2 35 fT Hz−1/2 at 19 K; Φ0 is quantum.
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Amos Sharoni, Israel Felner, Oded Millo, Tunneling spectroscopy and magnetization measurements of the superconducting properties of MgB{sub 2} Physical Review B. ,vol. 63, pp. 220508- ,(2001) , 10.1103/PHYSREVB.63.220508
Alexander Brinkman, Dick Veldhuis, Dragana Mijatovic, Guus Rijnders, Dave H. A. Blank, Hans Hilgenkamp, Horst Rogalla, Superconducting quantum interference device based on MgB2 nanobridges Applied Physics Letters. ,vol. 79, pp. 2420- 2422 ,(2001) , 10.1063/1.1407864
Roger H. Koch, John Clarke, W. M. Goubau, J. M. Martinis, C. M. Pegrum, D. J. van Harlingen, Flicker (1/f) noise in tunnel junction DC SQUIDS Journal of Low Temperature Physics. ,vol. 51, pp. 207- 224 ,(1983) , 10.1007/BF00683423
D. E. McCumber, Effect of ac Impedance on dc Voltage‐Current Characteristics of Superconductor Weak‐Link Junctions Journal of Applied Physics. ,vol. 39, pp. 3113- 3118 ,(1968) , 10.1063/1.1656743
G. Karapetrov, M. Iavarone, W. K. Kwok, G. W. Crabtree, D. G. Hinks, Scanning tunneling spectroscopy in MgB2. Physical Review Letters. ,vol. 86, pp. 4374- 4377 ,(2001) , 10.1103/PHYSREVLETT.86.4374
G. Rubio-Bollinger, H. Suderow, S. Vieira, Tunneling spectroscopy in small grains of superconducting MgB(2). Physical Review Letters. ,vol. 86, pp. 5582- 5584 ,(2001) , 10.1103/PHYSREVLETT.86.5582
Jun Nagamatsu, Norimasa Nakagawa, Takahiro Muranaka, Yuji Zenitani, Jun Akimitsu, Superconductivity at 39 K in magnesium diboride Nature. ,vol. 410, pp. 63- 64 ,(2001) , 10.1038/35065039
R. C. Dynes, V. Narayanamurti, J. P. Garno, Direct Measurement of Quasiparticle-Lifetime Broadening in a Strong-Coupled Superconductor Physical Review Letters. ,vol. 41, pp. 1509- 1512 ,(1978) , 10.1103/PHYSREVLETT.41.1509
Claudia D. Tesche, John Clarke, dc SQUID: Noise and optimization Journal of Low Temperature Physics. ,vol. 29, pp. 301- 331 ,(1977) , 10.1007/BF00655097
M.J. Wengler, Submillimeter-wave detection with superconducting tunnel diodes Proceedings of the IEEE. ,vol. 80, pp. 1810- 1826 ,(1992) , 10.1109/5.175257