scholarly journals Edge-state transport in separately contacted double-layer quantum Hall systems

1996 ◽  
Vol 53 (24) ◽  
pp. R16168-R16171 ◽  
Author(s):  
D. Yoshioka ◽  
A. H. MacDonald
Keyword(s):  
Double Layer ◽  
Quantum Hall ◽  
Edge State ◽  
Quantum Hall Systems

scholarly journals Controllable quantum point junction on the surface of an antiferromagnetic topological insulator

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Nicodemos Varnava ◽  
Justin H. Wilson ◽  
J. H. Pixley ◽  
David Vanderbilt
Keyword(s):  
Topological Insulator ◽  
Information Science ◽  
Domain Walls ◽  
Quantum Hall ◽  
Edge State ◽  
Wave Functions ◽  
Quantum Hall Systems ◽  
Electron Quantum ◽  
Quantum Point ◽  
Higher Temperature

AbstractEngineering and manipulation of unidirectional channels has been achieved in quantum Hall systems, leading to the construction of electron interferometers and proposals for low-power electronics and quantum information science applications. However, to fully control the mixing and interference of edge-state wave functions, one needs stable and tunable junctions. Encouraged by recent material candidates, here we propose to achieve this using an antiferromagnetic topological insulator that supports two distinct types of gapless unidirectional channels, one from antiferromagnetic domain walls and the other from single-height steps. Their distinct geometric nature allows them to intersect robustly to form quantum point junctions, which then enables their control by magnetic and electrostatic local probes. We show how the existence of stable and tunable junctions, the intrinsic magnetism and the potential for higher-temperature performance make antiferromagnetic topological insulators a promising platform for electron quantum optics and microelectronic applications.

Optical Fermi edge singularity of double-layer quantum Hall systems

1993 ◽  
Vol 71 (5) ◽  
pp. 773-776 ◽  
Author(s):  
Jun Zang ◽  
David Schmeltzer ◽  
Joseph L. Birman
Keyword(s):  
Double Layer ◽  
Quantum Hall ◽  
Edge Singularity ◽  
Quantum Hall Systems ◽  
Fermi Edge ◽  
Fermi Edge Singularity

Phase diagram of vortices in double-layer quantum Hall systems

1996 ◽  
Vol 53 (12) ◽  
pp. R7614-R7617 ◽  
Author(s):  
Igor Tupitsyn ◽  
Mats Wallin ◽  
Anders Rosengren
Keyword(s):  
Phase Diagram ◽  
Double Layer ◽  
Quantum Hall ◽  
Quantum Hall Systems

scholarly journals Thermodynamics of double-layer quantum Hall systems

2002 ◽  
Vol 66 (15) ◽  
Author(s):  
Emiliano Papa ◽  
Alexei M. Tsvelik
Keyword(s):  
Double Layer ◽  
Quantum Hall ◽  
Quantum Hall Systems

scholarly journals JOSEPHSON EFFECT AND ASSOCIATED PHENOMENA IN DOUBLE-LAYER QUANTUM HALL SYSTEMS

1994 ◽  
Vol 08 (16) ◽  
pp. 2111-2155 ◽  
Author(s):  
Z.F. EZAWA ◽  
A. IWAZAKI
Keyword(s):  
Double Layer ◽  
Josephson Effect ◽  
Cooper Pair ◽  
Quantum Hall ◽  
Meissner Effect ◽  
Plasmon Excitation ◽  
Josephson Tunneling ◽  
Quantum Hall Systems ◽  
System A ◽  
Chern Simons

In certain double-layer quantum Hall systems we show the existence of Josephson phenomena such as the Josephson effect, the Meissner effect and the Anderson plasmon excitation. The distinctive feature is that the unit of the charge associated with the Josephson tunneling is e of the single electron and not 2e of the Cooper pair. We develop a theory of these Josephson phenomena by using the Chern-Simons formulation of the planar electrons. We explain our results by using the pseudospin language. Furthermore, we point out that Anderson plasmon excitations may already have been observed by a recent experiment on a double-layer quantum Hall system. A microwave experiment without attaching external leads is proposed for a direct observation of plasmon excitations.

scholarly journals Spontaneous interlayer coherence in double-layer quantum Hall systems: Charged vortices and Kosterlitz-Thouless phase transitions

1995 ◽  
Vol 51 (8) ◽  
pp. 5138-5170 ◽  
Author(s):  
K. Moon ◽  
H. Mori ◽  
Kun Yang ◽  
S. M. Girvin ◽  
A. H. MacDonald ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Double Layer ◽  
Quantum Hall ◽  
Quantum Hall Systems

INTERLAYER SURFACE TRANSPORT IN MULTILAYER QUANTUM HALL SYSTEMS UNDER TILTED MAGNETIC FIELDS

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1524-1528
Author(s):  
Shinji Okui ◽  
Eiji Ohmichi ◽  
Toshihito Osada
Keyword(s):  
Magnetic Fields ◽  
Density Distribution ◽  
Surface State ◽  
Quantum Hall ◽  
Edge State ◽  
The Other ◽  
Surface Transport ◽  
Quantum Hall Systems ◽  
Chiral Surface

We have studied interlayer surface transport in multilayer quantum Hall systems under tilted magnetic fields. Under the fields normal to layers, edge state of each layer couples with each other due to interlayer tunneling forming the chiral surface state, which causes the surface transport. Once the field is tilted to the normal of the surface, the inter-edge tunneling is suppressed except at the certain magic angles. On the other hands, when the field is tilted in the surface, the inter-edge tunneling reflects the density distribution of the edge state. We carried out the experiments to confirm these features using GaAs/AlGaAs superlattices.

Charged pseudospin textures in double-layer quantum Hall systems: Bimerons and meron crystals

1996 ◽  
Vol 54 (23) ◽  
pp. 16888-16902 ◽  
Author(s):  
L. Brey ◽  
H. A. Fertig ◽  
R. Côté ◽  
A. H. MacDonald
Keyword(s):  
Double Layer ◽  
Quantum Hall ◽  
Quantum Hall Systems
Sign in / Sign up

Export Citation Format

Share Document