YBCO/Pb tunnel junctions: reproducibility, cyclability and role of the oxygen content at the YBCO surface

1991 ◽  
Vol 27 (2) ◽  
pp. 1349-1352 ◽  
Author(s):  
A.M. Cucolo ◽  
R. Di Leo ◽  
P. Romano ◽  
L.F. Schneemeyer ◽  
J.V. Waszczak
Keyword(s):  
Oxygen Content ◽  
Tunnel Junctions

The Role of Allochthonous Inputs of Dissolved Organic Carbon on the Hypolimnetic Oxygen Content of Reservoirs

Ecosystems ◽  
2008 ◽  
Vol 11 (7) ◽  
pp. 1035-1053 ◽  
Author(s):  
Rafael Marcé ◽  
Enrique Moreno-Ostos ◽  
Pilar López ◽  
Joan Armengol
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Oxygen Content ◽  
Allochthonous Inputs ◽  
Hypolimnetic Oxygen

Computational and experimental investigations on electronic and optical response of oxygenated MoS2

2021 ◽  
Author(s):  
Mubashira Shakeel ◽  
M. Javed Iqbal ◽  
Mammor Iftikhar ◽  
Umer Farooq ◽  
Muhammad Tauseef Qureshi ◽  
...  
Keyword(s):  
Oxygen Content ◽  
Blue Shift ◽  
Visible Range ◽  
Experimental Investigations ◽  
Optical Parameters ◽  
First Principle ◽  
Absorption Phenomenon ◽  
Effect Of Oxygen ◽  
Optical Behavior

Abstract The current study is concerned with the first principle investigations of the oxygenated MoS2 to explore the electronic and optical properties. We consider various oxygen concentrations (MoS2, MoS1.75O0.25, MoS1.5O0.5, MoSO) for the prediction of its impact on parameters using PBE-GGA approximation. A noticeable change in parameters has been observed in the visible regime with the introduction of oxygen content in the MoS2 structure. The results of the electronic properties suggest a string role of Mo d-states, S p-states, and O p-states which, however, show variations for various O concentrations near the Fermi level. In comparison to the absorption trend of pure MoS2, the optical absorption spectra show a blue shift in the visible range. The effect of oxygen can also be seen in the experimentally prepared MoS2 thin films as the variation of optical behavior can be seen. Refractive index decreases from ~2.5 to ~2. Similarly, absorption graphs show a lack of absorption phenomenon as the oxygen content increases. The role of oxygen brings appreciable changes in the optical parameters over the different energy ranges.

Role of Metal-Oxide Interface in Determining the Spin Polarization of Magnetic Tunnel Junctions

Science ◽  
1999 ◽  
Vol 286 (5439) ◽  
pp. 507-509 ◽  
Author(s):  
Jose Maria De Teresa ◽  
Agnès Barthélémy ◽  
Albert Fert ◽  
Jean Pierre Contour ◽  
François Montaigne ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Metal Oxide ◽  
Spin Polarization ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Ferromagnetic Transition ◽  
Oxide Interface ◽  
Oxide Interfaces ◽  
Structure Of Metal

The role of the metal-oxide interface in determining the spin polarization of electrons tunneling from or into ferromagnetic transition metals in magnetic tunnel junctions is reported. The spin polarization of cobalt in tunnel junctions with an alumina barrier is positive, but it is negative when the barrier is strontium titanate or cerium lanthanite. The results are ascribed to bonding effects at the transition metal–barrier interface. The influence of the electronic structure of metal-oxide interfaces on the spin polarization raises interesting fundamental problems and opens new ways to optimize the magnetoresistance of tunnel junctions.

Cavity Plasmonics in Tunnel Junctions: Outcoupling and the Role of Surface Roughness

2020 ◽  
Vol 14 (4) ◽  
Author(s):  
Thorin J. Duffin ◽  
Vijith Kalathingal ◽  
Andreea Radulescu ◽  
Changjian Li ◽  
Stephen J. Pennycook ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Tunnel Junctions

The role of ion-beam cleaning in the growth of strained-layer epitaxial thin transition metal films

1987 ◽  
Vol 2 (4) ◽  
pp. 446-455 ◽  
Author(s):  
Sung I. Park ◽  
A. Marshall ◽  
R. H. Hammond ◽  
T. H. Geballe ◽  
J. Talvacchio
Keyword(s):  
Tunnel Junctions ◽  
Ion Beam ◽  
Surface Damage ◽  
Metal Films ◽  
Strained Layer ◽  
Transmission Electron ◽  
Lattice Matched

Low-energy ion-beam cleaning of the substrates prior to a deposition greatly enhances the quality of ultrathin (< 100 Å) refractory superconducting (Nb, V) films. Using this technique Nb films as thin as 7 Å have been grown, from which good tunnel junctions have been fabricated. Both the native films and the tunnel junctions are sturdy and can be thermally recycled without any degradation. In-situ surface study along with transmission electron microscopy (TEM) results suggest the removal of the carbon atoms from the surface of the substrate without an apparent surface damage as the causes of the improvement. The TEM results indicate that the Nb films grow perfectly lattice matched to the sapphire substrate when the substrate is ion-beam cleaned. This strained-layer epitaxy is observed up to 40 Å, the maximum thickness investigated through TEM.

Role of interfacial roughness on bias-dependent magnetoresistance and transport properties in magnetic tunnel junctions

2005 ◽  
Vol 98 (10) ◽  
pp. 103504 ◽  
Author(s):  
J. C. A. Huang ◽  
C. Y. Hsu ◽  
Y. F. Liao ◽  
M. Z. Lin ◽  
C. H. Lee
Keyword(s):  
Transport Properties ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Interfacial Roughness

Role of oxygen content on dimensionality and pinning of epitaxial BSCCO-2212

1994 ◽  
Vol 16 (10-11) ◽  
pp. 1947-1951
Author(s):  
B. Camarota ◽  
D. Fiorani ◽  
A. M. Testa ◽  
G. Balestrino ◽  
E. Milani
Keyword(s):  
Oxygen Content

scholarly journals Role of boron diffusion in CoFeB/MgO magnetic tunnel junctions

2015 ◽  
Vol 91 (8) ◽  
Author(s):  
Sumanta Mukherjee ◽  
Ronny Knut ◽  
S. M. Mohseni ◽  
T. N. Anh Nguyen ◽  
S. Chung ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Boron Diffusion
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