Imaging of integer quantum Hall edge state in a quantum point contact via scanning gate microscopy

2005 ◽  
Vol 72 (15) ◽  
Author(s):  
N. Aoki ◽  
C. R. da Cunha ◽  
R. Akis ◽  
D. K. Ferry ◽  
Y. Ochiai
Keyword(s):  
Quantum Hall ◽  
Point Contact ◽  
Edge State ◽  
Quantum Point Contact ◽  
Scanning Gate Microscopy ◽  
Integer Quantum ◽  
Scanning Gate ◽  
Quantum Point

scholarly journals Study of quantum point contact via low temperature scanning gate microscopy

2006 ◽  
Vol 38 ◽  
pp. 79-82 ◽  
Author(s):  
N Aoki ◽  
A Burke ◽  
C R da Cunha ◽  
R Akis ◽  
D K Ferry ◽  
...  
Keyword(s):  
Low Temperature ◽  
Point Contact ◽  
Quantum Point Contact ◽  
Scanning Gate Microscopy ◽  
Scanning Gate ◽  
Quantum Point ◽  
Temperature Scanning

scholarly journals Signatures of folded branches in the scanning gate microscopy of ballistic electronic cavities

2021 ◽  
Vol 10 (3) ◽  
Author(s):  
Keith R. Fratus ◽  
Camille Le Calonnec ◽  
Rodolfo Jalabert ◽  
Guillaume Weick ◽  
Dietmar Weinmann
Keyword(s):  
Flow Characteristic ◽  
Point Contact ◽  
Quantum Point Contact ◽  
Dimensional Electron ◽  
Scanning Gate Microscopy ◽  
Classical Trajectories ◽  
Scanning Gate ◽  
Quantum Point ◽  
Dimensional Electron Gas ◽  
Experimental Findings

We demonstrate the emergence of classical features in electronic quantum transport for the scanning gate microscopy response in a cavity defined by a quantum point contact and a micron-sized circular reflector. The branches in electronic flow characteristic of a quantum point contact opening on a two-dimensional electron gas with weak disorder are folded by the reflector, yielding a complex spatial pattern. Considering the deflection of classical trajectories by the scanning gate tip allows to establish simple relationships of the scanning pattern, which are in agreement with recent experimental findings.

Scanning gate microscopy investigations on an InGaAs quantum point contact

2005 ◽  
Vol 87 (22) ◽  
pp. 223501 ◽  
Author(s):  
Nobuyuki Aoki ◽  
Carlo R. Da Cunha ◽  
Richard Akis ◽  
David K. Ferry ◽  
Yuichi Ochiai
Keyword(s):  
Point Contact ◽  
Quantum Point Contact ◽  
Scanning Gate Microscopy ◽  
Scanning Gate ◽  
Quantum Point

scholarly journals Imaging the lateral shift of a quantum point contact using scanning gate microscopy

2011 ◽  
Vol 84 (19) ◽  
Author(s):  
S. Schnez ◽  
C. Rössler ◽  
T. Ihn ◽  
K. Ensslin ◽  
C. Reichl ◽  
...  
Keyword(s):  
Point Contact ◽  
Lateral Shift ◽  
Quantum Point Contact ◽  
Scanning Gate Microscopy ◽  
Scanning Gate ◽  
Quantum Point

Scanning gate microscopy on a graphene quantum point contact

2012 ◽  
Vol 44 (6) ◽  
pp. 1002-1004 ◽  
Author(s):  
S. Neubeck ◽  
L.A. Ponomarenko ◽  
A.S. Mayorov ◽  
S.V. Morozov ◽  
R. Yang ◽  
...  
Keyword(s):  
Point Contact ◽  
Quantum Point Contact ◽  
Scanning Gate Microscopy ◽  
Scanning Gate ◽  
Quantum Point

scholarly journals What Is Measured in the Scanning Gate Microscopy of a Quantum Point Contact?

2010 ◽  
Vol 105 (16) ◽  
Author(s):  
Rodolfo A. Jalabert ◽  
Wojciech Szewc ◽  
Steven Tomsovic ◽  
Dietmar Weinmann
Keyword(s):  
Point Contact ◽  
Quantum Point Contact ◽  
Scanning Gate Microscopy ◽  
Scanning Gate ◽  
Quantum Point

scholarly journals Symmetry Properties of Mixed and Heat Photo-Assisted Noise in the Quantum Hall Regime

Entropy ◽  
2019 ◽  
Vol 21 (8) ◽  
pp. 730 ◽  
Author(s):  
Flavio Ronetti ◽  
Matteo Acciai ◽  
Dario Ferraro ◽  
Jérôme Rech ◽  
Thibaut Jonckheere Thierry Martin ◽  
...  
Keyword(s):  
Quantum Hall ◽  
Point Contact ◽  
Quantum Point Contact ◽  
Dc Voltage ◽  
Quantum Hall States ◽  
Quantum Hall Regime ◽  
Symmetry Properties ◽  
Hall Regime ◽  
Mixed Noise ◽  
Quantum Point

We investigate the photo-assisted charge-heat mixed noise and the heat noise generated by periodic drives in Quantum Hall states belonging to the Laughlin sequence. Fluctuations of the charge and heat currents are due to weak backscattering induced in a quantum point contact geometry and are evaluated at the lowest order in the tunneling amplitude. Focusing on the cases of a cosine and Lorentzian periodic drive, we show that the different symmetries of the photo-assisted tunneling amplitudes strongly affect the overall profile of these quantities as a function of the AC and DC voltage contributions, which can be tuned independently in experiments.

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