### Abstract

Measurements are reported of the current-voltage (I-V) characteristics of externally shunted oxide-barrier tunnel junctions at temperatures T and critical currents Ic such that the Josephson coupling energy (2e)Ic is comparable to the thermal energy k T. The measurements are in complete quantitative agreement with the theory of Ambegaokar and Halperin in the limit that the dimensionless parameter βc=(2e) (IcCσ2)1, where C is the capacitance and σ the total conductance of the shunted junction. Measurements for larger values of βc are in qualitative agreement with the theory of Kurkijärvi and Ambegaokar. In addition, the Ambegaokar-Halperin theory is generalized to include the cos pair-quasiparticle interference term. It is concluded that a measurement of the cos term using only the I-V characteristic will be difficult.

Original language | English (US) |
---|---|

Pages (from-to) | 1865-1873 |

Number of pages | 9 |

Journal | Physical Review B |

Volume | 10 |

Issue number | 5 |

DOIs | |

State | Published - 1974 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Condensed Matter Physics

### Cite this

*Physical Review B*,

*10*(5), 1865-1873. https://doi.org/10.1103/PhysRevB.10.1865

**Effect of thermal noise on current-voltage characteristics of Josephson junctions.** / Falco, Charles M; Parker, W. H.; Trullinger, S. E.; Hansma, Paul K.

Research output: Contribution to journal › Article

*Physical Review B*, vol. 10, no. 5, pp. 1865-1873. https://doi.org/10.1103/PhysRevB.10.1865

}

TY - JOUR

T1 - Effect of thermal noise on current-voltage characteristics of Josephson junctions

AU - Falco, Charles M

AU - Parker, W. H.

AU - Trullinger, S. E.

AU - Hansma, Paul K.

PY - 1974

Y1 - 1974

N2 - Measurements are reported of the current-voltage (I-V) characteristics of externally shunted oxide-barrier tunnel junctions at temperatures T and critical currents Ic such that the Josephson coupling energy (2e)Ic is comparable to the thermal energy k T. The measurements are in complete quantitative agreement with the theory of Ambegaokar and Halperin in the limit that the dimensionless parameter βc=(2e) (IcCσ2)1, where C is the capacitance and σ the total conductance of the shunted junction. Measurements for larger values of βc are in qualitative agreement with the theory of Kurkijärvi and Ambegaokar. In addition, the Ambegaokar-Halperin theory is generalized to include the cos pair-quasiparticle interference term. It is concluded that a measurement of the cos term using only the I-V characteristic will be difficult.

AB - Measurements are reported of the current-voltage (I-V) characteristics of externally shunted oxide-barrier tunnel junctions at temperatures T and critical currents Ic such that the Josephson coupling energy (2e)Ic is comparable to the thermal energy k T. The measurements are in complete quantitative agreement with the theory of Ambegaokar and Halperin in the limit that the dimensionless parameter βc=(2e) (IcCσ2)1, where C is the capacitance and σ the total conductance of the shunted junction. Measurements for larger values of βc are in qualitative agreement with the theory of Kurkijärvi and Ambegaokar. In addition, the Ambegaokar-Halperin theory is generalized to include the cos pair-quasiparticle interference term. It is concluded that a measurement of the cos term using only the I-V characteristic will be difficult.

UR - http://www.scopus.com/inward/record.url?scp=0000354760&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000354760&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.10.1865

DO - 10.1103/PhysRevB.10.1865

M3 - Article

AN - SCOPUS:0000354760

VL - 10

SP - 1865

EP - 1873

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 5

ER -