Abstract
Vortex-ring nucleation by thermal activation and quantum-tunneling processes in high-Tc superconductors is discussed. The nonlinear resistance scales as e1/2-(J/J)1/2. Thermal activation yields a critical index of 1/2=1, while quantum tunneling (without normal current dissipation) yields a critical index of 1/2=2. Current-voltage characteristics were measured on both disordered (low-Jc), ordered (c axis normal to the film plane, high-Jc) Y-Ba-Cu-O films, and microbridges below Tc. The data were examined in terms of both thermal-activation and quantum-nucleation models. For the disordered films, the 1/2=1 scaling law is in reasonable agreement with data, while 1/2=2 scaling is required to explain the results of the ordered films at low temperatures. For the microbridges, the 1/2=2 scaling extends even to high temperatures.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3048-3053 |
| Number of pages | 6 |
| Journal | Physical Review B |
| Volume | 45 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jan 1 1992 |
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ASJC Scopus subject areas
- Condensed Matter Physics
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Quantum nucleation and thermal activation of vortex rings in high-Tc superconductors. / Jiang, H.; Widom, A.; Huang, Yonggang; Yuan, T.; Vittoria, C.; Chrisey, D. B.; Horwitz, J. S.
In: Physical Review B, Vol. 45, No. 6, 01.01.1992, p. 3048-3053.Research output: Contribution to journal › Article
TY - JOUR
T1 - Quantum nucleation and thermal activation of vortex rings in high-Tc superconductors
AU - Jiang, H.
AU - Widom, A.
AU - Huang, Yonggang
AU - Yuan, T.
AU - Vittoria, C.
AU - Chrisey, D. B.
AU - Horwitz, J. S.
PY - 1992/1/1
Y1 - 1992/1/1
N2 - Vortex-ring nucleation by thermal activation and quantum-tunneling processes in high-Tc superconductors is discussed. The nonlinear resistance scales as e1/2-(J/J)1/2. Thermal activation yields a critical index of 1/2=1, while quantum tunneling (without normal current dissipation) yields a critical index of 1/2=2. Current-voltage characteristics were measured on both disordered (low-Jc), ordered (c axis normal to the film plane, high-Jc) Y-Ba-Cu-O films, and microbridges below Tc. The data were examined in terms of both thermal-activation and quantum-nucleation models. For the disordered films, the 1/2=1 scaling law is in reasonable agreement with data, while 1/2=2 scaling is required to explain the results of the ordered films at low temperatures. For the microbridges, the 1/2=2 scaling extends even to high temperatures.
AB - Vortex-ring nucleation by thermal activation and quantum-tunneling processes in high-Tc superconductors is discussed. The nonlinear resistance scales as e1/2-(J/J)1/2. Thermal activation yields a critical index of 1/2=1, while quantum tunneling (without normal current dissipation) yields a critical index of 1/2=2. Current-voltage characteristics were measured on both disordered (low-Jc), ordered (c axis normal to the film plane, high-Jc) Y-Ba-Cu-O films, and microbridges below Tc. The data were examined in terms of both thermal-activation and quantum-nucleation models. For the disordered films, the 1/2=1 scaling law is in reasonable agreement with data, while 1/2=2 scaling is required to explain the results of the ordered films at low temperatures. For the microbridges, the 1/2=2 scaling extends even to high temperatures.
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U2 - 10.1103/PhysRevB.45.3048
DO - 10.1103/PhysRevB.45.3048
M3 - Article
AN - SCOPUS:0642268871
VL - 45
SP - 3048
EP - 3053
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 6
ER -