scholarly journals Andreev reflection spectroscopy of the new Fe-based superconductor EuAsFeO0.85F0.15: Evidence of strong anisotropy in the order parameter

2011 ◽  
Vol 37 (4) ◽  
pp. 280-286 ◽  
Author(s):  
V. M. Dmitriev ◽  
E. P. Khlybov ◽  
D. S. Kondrashov ◽  
A. V. Terekhov ◽  
L. F. Rybaltchenko ◽  
...  
Keyword(s):  
Order Parameter ◽  
Andreev Reflection ◽  
Reflection Spectroscopy ◽  
Strong Anisotropy

Andreev reflection spectroscopy of high-Tc superconductors at high pressures

1999 ◽  
Vol 312 (1-2) ◽  
pp. 40-44
Author(s):  
V.M. Svistunov ◽  
A.I. D'yachenko ◽  
V.Yu. Tarenkov ◽  
R. Aoki
Keyword(s):  
Andreev Reflection ◽  
High Pressures ◽  
Reflection Spectroscopy ◽  
High Tc Superconductors ◽  
High Tc

scholarly journals Point contact Andreev reflection spectroscopy of NdFeAsO0.85

2008 ◽  
Vol 21 (9) ◽  
pp. 092003 ◽  
Author(s):  
K A Yates ◽  
L F Cohen ◽  
Zhi-An Ren ◽  
Jie Yang ◽  
Wei Lu ◽  
...  
Keyword(s):  
Andreev Reflection ◽  
Point Contact ◽  
Reflection Spectroscopy

TRANSPORT IN MgB2 IN HIGH MAGNETIC FIELDS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3222-3222
Author(s):  
P. SZABO ◽  
P. SAMUELY ◽  
A. G. M. JANSEN ◽  
T. KLEIN ◽  
J. MARCUS ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Negative Curvature ◽  
Andreev Reflection ◽  
Positive Curvature ◽  
Upper Critical Field ◽  
Critical Magnetic Field ◽  
High Magnetic Fields ◽  
Reflection Spectroscopy ◽  
Upper Critical Magnetic Field ◽  
Energy Gaps

Magnetotransport measurements are presented on polycrystalline MgB 2 samples. The 'resistive' upper critical magnetic field reveals a temperature dependence with positive curvature from Tc = 39.3 K down to about 20 K, then changes to slightly negative curvature reaching 26 T at 1.5 K. The 26-Tesla upper critical field is much higher than what is known so far on polycrystals of MgB 2 but it is in agreement with the recent data obtained on epitaxial MgB 2 films.1 The deviation of Hc2(T) from standard BCS might be due to the proposed two-gap superconductivity in this compound.2 Recently we have found evidence for the existence of two superconducting energy gaps in this system using Andreev reflection spectroscopy.3 The temperature dependence of the resistivity and the normal state magnetoresistance are analyzed.

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