scanning gate
Recently Published Documents


TOTAL DOCUMENTS

121
(FIVE YEARS 4)

H-INDEX

21
(FIVE YEARS 0)

AIP Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 125122
Author(s):  
Seong Woo Oh ◽  
Artem O. Denisov ◽  
Pengcheng Chen ◽  
Jason R. Petta

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
N. Moreau ◽  
B. Brun ◽  
S. Somanchi ◽  
K. Watanabe ◽  
T. Taniguchi ◽  
...  

AbstractThe quantum Hall effect is the seminal example of topological protection, as charge carriers are transmitted through one-dimensional edge channels where backscattering is prohibited. Graphene has made its marks as an exceptional platform to reveal new facets of this remarkable property. However, in conventional Hall bar geometries, topological protection of graphene edge channels is found regrettably less robust than in high mobility semi-conductors. Here, we explore graphene quantum Hall regime at the local scale, using a scanning gate microscope. We reveal the detrimental influence of antidots along the graphene edges, mediating backscattering towards upstream edge channels, hence triggering topological breakdown. Combined with simulations, our experimental results provide further insights into graphene quantum Hall channels vulnerability. In turn, this may ease future developments towards precise manipulation of topologically protected edge channels hosted in various types of two-dimensional crystals.


2021 ◽  
Vol 10 (3) ◽  
Author(s):  
Keith R. Fratus ◽  
Camille Le Calonnec ◽  
Rodolfo Jalabert ◽  
Guillaume Weick ◽  
Dietmar Weinmann

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.


2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Carolin Gold ◽  
Annika Kurzmann ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
Klaus Ensslin ◽  
...  

2020 ◽  
Vol MA2020-01 (8) ◽  
pp. 738-738
Author(s):  
Boris Brun ◽  
Nicolas Moreau ◽  
Sowmya Somanchi ◽  
Viet-Hung Nguyen ◽  
K Watanabe ◽  
...  

2020 ◽  
Vol 31 (20) ◽  
pp. 205205
Author(s):  
Kohei Sakanashi ◽  
Hidemitsu Ouchi ◽  
Kota Kamiya ◽  
Peter Krüger ◽  
Katsuhiko Miyamoto ◽  
...  

2019 ◽  
Vol 31 (41) ◽  
pp. 415302
Author(s):  
A A Zhukov ◽  
Ch Volk ◽  
A Winden ◽  
H Hardtdegen ◽  
Th Schäpers

Sign in / Sign up

Export Citation Format

Share Document