Terahertz applications of integrated circuits based on intrinsic Josephson junctions in high Tc superconductors

2001 ◽  
Author(s):  
Huabing Wang ◽  
Peiheng Wu ◽  
Tsutomu Yamashita
Keyword(s):  
Integrated Circuits ◽  
Josephson Junctions ◽  
High Tc Superconductors ◽  
High Tc ◽  
Intrinsic Josephson Junctions ◽  
Terahertz Applications

Intrinsic Josephson junctions: integrated circuits and possible applications

2003 ◽  
Vol 16 (12) ◽  
pp. 1375-1379 ◽  
Author(s):  
Huabing Wang ◽  
Jian Chen ◽  
Peiheng Wu ◽  
Tsutomu Yamashita ◽  
Denis Vasyukov ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Josephson Junctions ◽  
Intrinsic Josephson Junctions

High-Tc ramp-type Josephson junctions on MgO substrates for terahertz applications

1998 ◽  
Vol 8 (3) ◽  
pp. 132-136 ◽  
Author(s):  
H. Myoren ◽  
M.A.J. Verhoeven ◽  
Jian Chen ◽  
K. Nakajima ◽  
T. Yamashita ◽  
...  
Keyword(s):  
Josephson Junctions ◽  
High Tc ◽  
Terahertz Applications

Pair Symmetry and Degree of Gap Depression at S-I Interfaces in HTS Josephson Junctions

1999 ◽  
Vol 13 (09n10) ◽  
pp. 1301-1306
Author(s):  
G. A. Ummarino ◽  
R. S. Gonnelli ◽  
C. Bravi ◽  
Masumi Inoue
Keyword(s):  
Josephson Junctions ◽  
Order Parameter ◽  
Reference Value ◽  
High Tc Superconductors ◽  
S Wave ◽  
General Reference ◽  
High Tc ◽  
Wave Symmetry ◽  
Set Up ◽  
D Wave

A new possible indirect way of testing pair symmetry in high-Tc superconductors has been set up. The degree of intrinsic gap depression at Superconductor-Insulator [S-I] interfaces required to match Ic(T)Rn(T) data in HTS Josephson junctions depends on the pair symmetry of the material itself, so that an higher fraction of d-wave symmetry for the order parameter requires less gap depression, while an higher fraction of s-wave corresponds to a larger degree of gap depression. In order to obtain a general reference value for the intrinsic amount of gap depression at S-I interfaces the de Gennes condition has been used, and resulting reduced Ic(T)Rn(T) data have been calculated in the framework of a mixed (s+id)-wave pair symmetry for the depressed order parameter ranging from pure s to pure d-wave. This model has been tentatively applied to two junctions' made of very different HTSs: YBCO and BKBO, yielding a result of almost pure d-wave for YBCO and of pure s-wave for BKBO.

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