Superconducting energy gap from break-junction tunneling spectroscopy in the ternary silicide CaAlSi

2007 ◽  
Vol 76 (10) ◽  
Author(s):  
S. Kuroiwa ◽  
T. Takasaki ◽  
T. Ekino ◽  
J. Akimitsu
Keyword(s):  
Energy Gap ◽  
Tunneling Spectroscopy ◽  
Break Junction ◽  
Superconducting Energy Gap ◽  
Ternary Silicide

Superconducting energy gap of La1.85Sr0.15CuO4 single crystals from break-junction tunneling

1996 ◽  
Vol 263 (1-4) ◽  
pp. 249-252 ◽  
Author(s):  
T. Ekino ◽  
T. Doukan ◽  
H. Fujii ◽  
F. Nakamura ◽  
S. Sakita ◽  
...  
Keyword(s):  
Single Crystals ◽  
Energy Gap ◽  
Break Junction ◽  
Superconducting Energy Gap

TEMPERATURE DEPENDENCE OF GAP RELATED STRUCTURES IN YBa2Cu3O7-δ BREAK JUNCTIONS

2000 ◽  
Vol 14 (25n27) ◽  
pp. 3080-3085 ◽  
Author(s):  
F. GIUBILEO ◽  
F. BOBBA ◽  
A. M. CUCOLO ◽  
A. I. AKIMENKO
Keyword(s):  
Temperature Dependence ◽  
Energy Gap ◽  
Tunneling Current ◽  
Tunnel Barrier ◽  
Break Junction ◽  
Break Junctions ◽  
High Oxygen Pressure ◽  
Superconducting Energy Gap ◽  
Helium Gas ◽  
State Resistance

We have applied the break junction technique to highly epitaxial c-axis oriented YBaCuO thin films with T c (ρ=0)=91 K deposited on (001) SrTiO 3 or LaAlO 3 substrates by a high oxygen pressure d.c. sputtering technique. The film thickness was about 1500 Å and a photolithographic process was used to reduce to 100 μm the junction width across the fracture. By this procedure, tunable resistance break junctions with tunneling current favored along the ab-planes have been realized. The junctions were formed at low temperatures with freshly fractured surfaces and an inert tunnel barrier was created by helium gas or liquid. A good stability was obtained with the normal-state resistance R N changing about 15% in the temperature range between 4.2 K and 100 K. We have measured the temperature dependence of the conductance maxima that are related to superconducting energy gap at the Fermi level.

Tunneling spectroscopy of the superconducting energy gap inRNi2B2C(R=YandLu)

1996 ◽  
Vol 53 (9) ◽  
pp. 5640-5649 ◽  
Author(s):  
Toshikazu Ekino ◽  
Hironobu Fujii ◽  
Makoto Kosugi ◽  
Yuji Zenitani ◽  
Jun Akimitsu
Keyword(s):  
Energy Gap ◽  
Tunneling Spectroscopy ◽  
Superconducting Energy Gap

scholarly journals Phonon self-energy effects in the superconducting energy gap ofMgB2point-contact spectra

2004 ◽  
Vol 69 (10) ◽  
Author(s):  
I. K. Yanson ◽  
S. I. Beloborod’ko ◽  
Yu. G. Naidyuk ◽  
O. V. Dolgov ◽  
A. A. Golubov
Keyword(s):  
Energy Gap ◽  
Self Energy ◽  
Superconducting Energy Gap

Tunneling spectroscopy of a La-Sr-Cu-O break junction: Evidence for strong-coupling superconductivity

1987 ◽  
Vol 35 (16) ◽  
pp. 8711-8713 ◽  
Author(s):  
John Moreland ◽  
A. F. Clark ◽  
L. F. Goodrich ◽  
H. C. Ku ◽  
R. N. Shelton
Keyword(s):  
Strong Coupling ◽  
Tunneling Spectroscopy ◽  
Break Junction

High Tc Oxide Superconductors

MRS Bulletin ◽  
1990 ◽  
Vol 15 (6) ◽  
pp. 31-33
Author(s):  
M. Brian Maple
Keyword(s):  
Physical Properties ◽  
Energy Gap ◽  
Vortex State ◽  
Oxide Superconductors ◽  
High Tc ◽  
Superconducting Energy Gap ◽  
Consistent Picture ◽  
Novel Processing ◽  
Processing Techniques

This issue of the MRS BULLETIN is devoted to high Tc superconductivity. It is the sequel to a previous series of articles on the same subject which appeared in the MRS BULLETIN in January 1989. While the articles in the January 1989 issue emphasized the families of high Tc superconducting oxides known at that rime, as well as novel processing techniques and thin films, the papers in this issue focus on the physical properties of high Tc oxide superconductors.The quality of polycrystalline and single-crystal bulk and thin-film materials has improved to the point where researchers can now make reliable measurements of many physical properties representative of the intrinsic behavior of these materials. As a result, a broad spectrum of important issues such as the nature of the electronic structure, the type of superconducting electron pairing, the magnitude and temperature dependence of the superconducting energy gap, the behavior of fluxoids in the vortex state, etc., can be addressed meaningfully. Presently emerging is a consistent picture of the physical properties of the high Tc oxides, which will form the foundation to eventually developing an appropriate theory for the normal and superconducting states of these remarkable materials.

Energy gap distribution on polycrystalline HgBa2CuO4+δ observed by scanning tunneling spectroscopy

1996 ◽  
Vol 46 (S3) ◽  
pp. 1337-1338
Author(s):  
P. Jess ◽  
U. Hubler ◽  
H. P. Lang ◽  
H. -J. Güntherodt ◽  
K. Lüders ◽  
...  
Keyword(s):  
Energy Gap ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling
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