Effect of terahertz irradiation on ballistic transport through one‐dimensional quantum point contacts

1995 ◽  
Vol 66 (23) ◽  
pp. 3149-3151 ◽  
Author(s):  
D. D. Arnone ◽  
J. E. F. Frost ◽  
C. G. Smith ◽  
D. A. Ritchie ◽  
G. A. C. Jones ◽  
...  
Keyword(s):  
Ballistic Transport ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
One Dimensional ◽  
Terahertz Irradiation ◽  
Quantum Point

TRANSPORT PROPERTIES OF TUNNEL-COUPLED ONE-DIMENSIONAL CHANNELS FROM AN ELECTRON BILAYER SYSTEM IN PERPENDICULAR MAGNETIC FIELD

2009 ◽  
Vol 23 (12n13) ◽  
pp. 2910-2914 ◽  
Author(s):  
S. S. BUCHHOLZ ◽  
S. F. FISCHER ◽  
U. KUNZE ◽  
D. SCHUH ◽  
G. ABSTREITER
Keyword(s):  
Magnetic Field ◽  
Transport Properties ◽  
Quantum Hall ◽  
Quantum Point Contacts ◽  
Perpendicular Magnetic Field ◽  
Point Contacts ◽  
One Dimensional ◽  
Bilayer System ◽  
Quantum Point ◽  
Landau Level Mixing

In a tunnel coupled GaAs / AlGaAs electron bilayer system (BLS), we compare transport measurements of 1D quantum Hall (QH) edge channels with lithographically defined quantum point contacts (QPCs). The electron densities in both systems can be varied by a top-gate. In a perpendicular magnetic field, Landau level mixing is observed in the QH regime, and indications of crossings of spin split QPC subbands are detected.

Ballistic Transport and Exchange Interaction in InAs Nanowire Quantum Point Contacts

Nano Letters ◽  
2016 ◽  
Vol 16 (5) ◽  
pp. 3116-3123 ◽  
Author(s):  
S. Heedt ◽  
W. Prost ◽  
J. Schubert ◽  
D. Grützmacher ◽  
Th. Schäpers
Keyword(s):  
Exchange Interaction ◽  
Ballistic Transport ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point

scholarly journals Ballistic transport through quantum point contacts of multiorbital oxides

2021 ◽  
Vol 103 (23) ◽  
Author(s):  
J. Settino ◽  
R. Citro ◽  
F. Romeo ◽  
V. Cataudella ◽  
C. A. Perroni
Keyword(s):  
Ballistic Transport ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point

scholarly journals Multi-Valued Logic Gates based on Ballistic Transport in Quantum Point Contacts

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
M. Seo ◽  
C. Hong ◽  
S.-Y. Lee ◽  
H. K. Choi ◽  
N. Kim ◽  
...  
Keyword(s):  
Ballistic Transport ◽  
Logic Gates ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point

scholarly journals New signatures of the spin gap in quantum point contacts

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
K. L. Hudson ◽  
A. Srinivasan ◽  
O. Goulko ◽  
J. Adam ◽  
Q. Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Point Contacts ◽  
Spin Orbit ◽  
Point Contacts ◽  
Spin Gap ◽  
One Dimensional ◽  
Topological Quantum ◽  
Potential Applications ◽  
Quantum Point ◽  
P Type

AbstractOne dimensional semiconductor systems with strong spin-orbit interaction are both of fundamental interest and have potential applications to topological quantum computing. Applying a magnetic field can open a spin gap, a pre-requisite for Majorana zero modes. The spin gap is predicted to manifest as a field dependent dip on the first 1D conductance plateau. However, disorder and interaction effects make identifying spin gap signatures challenging. Here we study experimentally and numerically the 1D channel in a series of low disorder p-type GaAs quantum point contacts, where spin-orbit and hole-hole interactions are strong. We demonstrate an alternative signature for probing spin gaps, which is insensitive to disorder, based on the linear and non-linear response to the orientation of the applied magnetic field, and extract a spin-orbit gap ΔE ≈ 500 μeV. This approach could enable one-dimensional hole systems to be developed as a scalable and reproducible platform for topological quantum applications.

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