scholarly journals Role of pair-breaking and phase fluctuations in c-axis tunneling in underdoped Bi2Sr2CaCu2O8+δ

2007 ◽  
Vol 460-462 ◽  
pp. 876-877
Author(s):  
C.J. van der Beek ◽  
P. Spathis ◽  
S. Colson ◽  
P. Gierlowski ◽  
M. Gaifullin ◽  
...  
Keyword(s):  
Pair Breaking ◽  
Phase Fluctuations

scholarly journals Fundamental dissipation due to bound fermions in the zero-temperature limit

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
S. Autti ◽  
S. L. Ahlstrom ◽  
R. P. Haley ◽  
A. Jennings ◽  
G. R. Pickett ◽  
...  
Keyword(s):  
Critical Velocity ◽  
Ground State ◽  
Bound States ◽  
Bound State ◽  
Temperature Limit ◽  
Pair Breaking ◽  
Zero Temperature ◽  
Andreev Bound States ◽  
Macroscopic Object

Abstract The ground state of a fermionic condensate is well protected against perturbations in the presence of an isotropic gap. Regions of gap suppression, surfaces and vortex cores which host Andreev-bound states, seemingly lift that strict protection. Here we show that in superfluid 3He the role of bound states is more subtle: when a macroscopic object moves in the superfluid at velocities exceeding the Landau critical velocity, little to no bulk pair breaking takes place, while the damping observed originates from the bound states covering the moving object. We identify two separate timescales that govern the bound state dynamics, one of them much longer than theoretically anticipated, and show that the bound states do not interact with bulk excitations.

A review of the superconducting and normal state properties of Y1−xPrxBa2Cu3O7

1992 ◽  
Vol 7 (7) ◽  
pp. 1917-1955 ◽  
Author(s):  
H.B. Radousky
Keyword(s):  
Thermal Properties ◽  
Normal State ◽  
Electronic Devices ◽  
Pair Breaking ◽  
Hole Filling ◽  
Normal State Properties ◽  
Magnetic Pair

The properties of the Y1−xPrxBa2Cu3O7(YPrBCO) system are reviewed. These include superconducting, normal state, structural, chemical, optical, magnetic, and thermal properties. The destruction of superconductivity with Pr doping is discussed in view of possible models such as hole filling, localization, magnetic pair-breaking, and the role of hybridization. Applications to electronic devices using YBCO/PrBCO/YBCO multilayers are also reviewed.

Role of pump phase fluctuations in a two-photon phase-sensitive amplifier

1995 ◽  
Vol 52 (3) ◽  
pp. 2350-2360 ◽  
Author(s):  
Mansoora Majeed ◽  
M. S. Zubairy
Keyword(s):  
Phase Fluctuations ◽  
Two Photon ◽  
Phase Sensitive
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