POSITIVE MAGNETO-RESISTANCE IN A POINT CONTACT: POSSIBLE MANIFESTATION OF INTERACTIONS

2007 ◽  
Vol 17 (03) ◽  
pp. 495-499
Author(s):  
V. T. RENARD ◽  
T. OTA ◽  
N. KUMADA ◽  
H. HIRAYAMA
Keyword(s):  
Point Contact ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Temperature Dependent ◽  
Quantum Point ◽  
Magneto Resistance ◽  
Unexpected Behavior ◽  
Electron Interactions

We report a non-monotonic and strongly temperature dependent magneto-resistance observed in clean quantum point contacts. At the same time the conductance of the point contact varies linearly with temperature. This unexpected behavior may be related to electron-electron interactions.

scholarly journals SUPERCONDUCTING QUANTUM POINT CONTACTS AND MAXWELL POTENTIAL

2007 ◽  
Vol 21 (12) ◽  
pp. 703-715 ◽  
Author(s):  
ARAFA H. ALY ◽  
JAMILA DOUARI
Keyword(s):  
Carrier Concentration ◽  
Critical Current ◽  
Point Contact ◽  
Quantum Point Contact ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Different Temperatures ◽  
Constant Potential ◽  
Quantum Point

The quantization of the current in a superconducting quantum point contact is reviewed and the critical current is discussed at different temperatures depending on the carrier concentration as well by suggesting a constant potential in the semiconductor and then a Maxwell potential. When the Fermi wavelength is comparable with the constriction width we showed that the critical current has a step-like variation as a function of the constriction width and the carrier concentration.

scholarly journals Boundary-Mediated Electron-Electron Interactions in Quantum Point Contacts

2008 ◽  
Vol 100 (18) ◽  
Author(s):  
V. T. Renard ◽  
O. A. Tkachenko ◽  
V. A. Tkachenko ◽  
T. Ota ◽  
N. Kumada ◽  
...  
Keyword(s):  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point ◽  
Electron Interactions

Electron–electron interactions in clean quantum point contacts in the large conductance regime

2008 ◽  
Vol 40 (5) ◽  
pp. 1684-1686
Author(s):  
V.T. Renard ◽  
O.A. Tkachenko ◽  
V.A. Tkachenko ◽  
T. Ota ◽  
N. Kumada ◽  
...  
Keyword(s):  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point ◽  
Electron Interactions

Different Transmission Regimes of Two Quantum Point Contacts in a Magnetic Field

1995 ◽  
Vol 5 (9) ◽  
pp. 1257-1262
Author(s):  
V. Marigliano Ramaglia ◽  
F. Ventriglia ◽  
G. P. Zucchelli
Keyword(s):  
Magnetic Field ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point

Double-Channel Electron Transport in Suspended Quantum Point Contacts with in-Plane Side Gates

2020 ◽  
Vol 54 (12) ◽  
pp. 1605-1610
Author(s):  
D. A. Pokhabov ◽  
A. G. Pogosov ◽  
E. Yu. Zhdanov ◽  
A. K. Bakarov ◽  
A. A. Shklyaev
Keyword(s):  
Electron Transport ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point ◽  
Double Channel

Resonant detection of microwave radiation in a circular two-dimensional electron system with quantum point contacts

2005 ◽  
Vol 87 (9) ◽  
pp. 092107 ◽  
Author(s):  
P. S. Dorozhkin ◽  
S. V. Tovstonog ◽  
S. A. Mikhailov ◽  
I. V. Kukushkin ◽  
J. H. Smet ◽  
...  
Keyword(s):  
Microwave Radiation ◽  
Electron System ◽  
Quantum Point Contacts ◽  
Two Dimensional ◽  
Point Contacts ◽  
Dimensional Electron ◽  
Dimensional Electron System ◽  
Quantum Point

Fabrication and characterisation of gallium arsenide ambipolar quantum point contacts

2015 ◽  
Vol 106 (18) ◽  
pp. 183504 ◽  
Author(s):  
J. C. H. Chen ◽  
O. Klochan ◽  
A. P. Micolich ◽  
K. Das Gupta ◽  
F. Sfigakis ◽  
...  
Keyword(s):  
Gallium Arsenide ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point

scholarly journals Quantum-ring spin interference device tuned by quantum point contacts

2013 ◽  
Vol 114 (19) ◽  
pp. 193706 ◽  
Author(s):  
Leo Diago-Cisneros ◽  
Francisco Mireles
Keyword(s):  
Quantum Ring ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point
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