Thermopower of two-dimensional channels and quantum point contacts in a magnetic field

2003 ◽  
Vol 15 (24) ◽  
pp. 4181-4188 ◽  
Author(s):  
V A Margulis ◽  
A V Shorokhov
Keyword(s):  
Magnetic Field ◽  
Quantum Point Contacts ◽  
Two Dimensional ◽  
Point Contacts ◽  
Quantum Point

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

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

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.

scholarly journals Magneto-transport Spectroscopy of the First and Second Two-dimensional Subbands in Al0.25Ga0.75N/GaN Quantum Point Contacts

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Fangchao Lu ◽  
Ning Tang ◽  
Liangliang Shang ◽  
Hongming Guan ◽  
Fujun Xu ◽  
...  
Keyword(s):  
Quantum Point Contacts ◽  
Two Dimensional ◽  
Point Contacts ◽  
Quantum Point

scholarly journals Coherent electron focusing with quantum point contacts in a two-dimensional electron gas

1989 ◽  
Vol 39 (12) ◽  
pp. 8556-8575 ◽  
Author(s):  
H. van Houten ◽  
C. W. J. Beenakker ◽  
J. G. Williamson ◽  
M. E. I. Broekaart ◽  
P. H. M. van Loosdrecht ◽  
...  
Keyword(s):  
Electron Gas ◽  
Quantum Point Contacts ◽  
Two Dimensional ◽  
Point Contacts ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Quantum Point ◽  
Dimensional Electron Gas ◽  
Electron Focusing

Nonlinear conductance of quantum point contacts in a magnetic field

1992 ◽  
Vol 7 (3B) ◽  
pp. B279-B282 ◽  
Author(s):  
A J M Neves ◽  
P C Main ◽  
C J G M Langerak ◽  
P H Beton ◽  
L Eaves ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Point Contacts ◽  
Point Contacts ◽  
Quantum Point ◽  
Nonlinear Conductance

scholarly journals Nuclear polarization in quantum point contacts in an in-plane magnetic field

2010 ◽  
Vol 81 (12) ◽  
Author(s):  
Y. Ren ◽  
W. Yu ◽  
S. M. Frolov ◽  
J. A. Folk ◽  
W. Wegscheider
Keyword(s):  
Magnetic Field ◽  
Nuclear Polarization ◽  
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.

The Thermoelectric Behaviour of two Dimensional Electron and Hole Gases and Quantum Point Contacts

1994 ◽  
pp. 219-232
Author(s):  
P. N. Butcher ◽  
T. M. Fromhold ◽  
R. R. Barraclough ◽  
P. R. Rogers ◽  
B. L. Gallagher ◽  
...  
Keyword(s):  
Quantum Point Contacts ◽  
Two Dimensional ◽  
Point Contacts ◽  
Dimensional Electron ◽  
Quantum Point ◽  
Thermoelectric Behaviour
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