π-squids based on Josephson contacts between high-Tc and low-Tc superconductors
作者： H. J. H. Smilde , Ariando , D. H. A. Blank , H. Hilgenkamp , H. Rogalla
DOI: 10.1103/PHYSREVB.70.024519
关键词:
摘要: For phase-sensitive studies on the pairing-symmetry in a given superconductor, its combination with well-characterized isotropic superconductor into superconducting quantum interference device (SQUID) provides very fruitful method. With well-controlled orientation and position of hybrid Josephson junctions involved, angular dependence both phase magnitude order parameter wave function can be determined. In view this, motivated by recent proposals for quantum-logic devices, we have investigated low-inductance dc SQUIDs different geometries. These are based ramp-type YBa2Cu3O7/Au/Nb oriented toward , YBa2Cu3O7−δ crystal axes. perpendicularly junctions, maxima critical current observed at applied fluxes ±1/2 Φ0 confirming predominant dx2-y2 pairing symmetry YBa2Cu3O7. The measured current-modulations these π-SQUIDs correspond well to simulations. No indications found any time-reversal breaking, instance resulting from imaginary admixtures.
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D. J. Van Harlingen, Phase-sensitive tests of the symmetry of the pairing state in the high-temperature superconductors-Evidence for d x 2 -y 2 symmetry Reviews of Modern Physics. ,vol. 67, pp. 515- 535 ,(1995) , 10.1103/REVMODPHYS.67.515
C. C. Tsuei, J. R. Kirtley, Pairing symmetry in cuprate superconductors Reviews of Modern Physics. ,vol. 72, pp. 969- 1016 ,(2000) , 10.1103/REVMODPHYS.72.969
D. A. Brawner, H. R. Ott, Evidence for an unconventional superconducting order parameter in YBa2Cu3O6.9. Physical Review B. ,vol. 50, pp. 6530- 6533 ,(1994) , 10.1103/PHYSREVB.50.6530
D. A. Wollman, D. J. Van Harlingen, W. C. Lee, D. M. Ginsberg, A. J. Leggett, Experimental determination of the superconducting pairing state in YBCO from the phase coherence of YBCO-Pb dc SQUIDs. Physical Review Letters. ,vol. 71, pp. 2134- 2137 ,(1993) , 10.1103/PHYSREVLETT.71.2134
A. Mathai, Y. Gim, R. C. Black, A. Amar, F. C. Wellstood, Experimental Proof of a Time-Reversal-Invariant Order Parameter with a π shift in YBa 2 Cu 3 O 7-δ Physical Review Letters. ,vol. 74, pp. 4523- 4526 ,(1995) , 10.1103/PHYSREVLETT.74.4523
R. R. Schulz, B. Chesca, B. Goetz, C. W. Schneider, A. Schmehl, H. Bielefeldt, H. Hilgenkamp, J. Mannhart, C. C. Tsuei, Design and realization of an all d-wave dc π-superconducting quantum interference device Applied Physics Letters. ,vol. 76, pp. 912- 914 ,(2000) , 10.1063/1.125627
Lev B. Ioffe, Vadim B. Geshkenbein, Mikhail V. Feigel'man, Alban L. Fauchère, Gianni Blatter, Environmentally decoupled sds -wave Josephson junctions for quantum computing Nature. ,vol. 398, pp. 679- 681 ,(1999) , 10.1038/19464
Gianni Blatter, Vadim B. Geshkenbein, Lev B. Ioffe, Design aspects of superconducting-phase quantum bits Physical Review B. ,vol. 63, pp. 1745111- 1745119 ,(2001) , 10.1103/PHYSREVB.63.174511
Henk-Jan H. Smilde, Hans Hilgenkamp, Guus Rijnders, Horst Rogalla, Dave H. A. Blank, Enhanced transparency ramp-type Josephson contacts through interlayer deposition Applied Physics Letters. ,vol. 80, pp. 4579- 4581 ,(2002) , 10.1063/1.1485305
Claudia D. Tesche, A thermal activation model for noise in the dc SQUID Journal of Low Temperature Physics. ,vol. 44, pp. 119- 147 ,(1981) , 10.1007/BF00115079