scholarly journals Electron/nuclear spin domain walls in quantum Hall systems

2003 ◽  
Vol 67 (24) ◽  
Author(s):  
Aditi Mitra ◽  
S. M. Girvin
Keyword(s):  
Nuclear Spin ◽  
Domain Walls ◽  
Quantum Hall ◽  
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.

Electron–Nuclear Spin Interaction in Edge States of Quantum Hall Systems

2003 ◽  
Vol 72 (Suppl.A) ◽  
pp. 44-48 ◽  
Author(s):  
Tomoki Machida ◽  
Tomoyuki Yamazaki ◽  
Susumu Ishizuka ◽  
Susumu Komiyama ◽  
Koji Muraki ◽  
...  
Keyword(s):  
Nuclear Spin ◽  
Quantum Hall ◽  
Spin Interaction ◽  
Edge States ◽  
Quantum Hall Systems

ON THE CURRENT DOMAIN PICTURE OF THE MICROWAVE INDUCED ZERO-RESISTANCE OF HIGH MOBILITY QUANTUM HALL SYSTEMS

2004 ◽  
Vol 18 (27n29) ◽  
pp. 3489-3492 ◽  
Author(s):  
MANFRED OSWALD ◽  
JOSEF OSWALD
Keyword(s):  
Domain Walls ◽  
Quantum Hall ◽  
High Mobility ◽  
Hall Resistance ◽  
Quantum Hall Systems ◽  
Current Path ◽  
Zero Resistance ◽  
Longitudinal Resistance ◽  
Resistance State ◽  
Current Filaments

Numerical simulations of the current domain picture, which is frequently used to describe the microwave induced zero resistance state of high mobility 2-dimensional electron systems, are shown. We demonstrate, that we obtain a situation, which is equivalent to the current domain picture by introducing an artificial domain wall into our network model for magneto transport. However, in contrast to the current domain picture the current in our simulations is insensitive to the width of the domains. Finally we propose an alternative picture where we use several domain walls, which are distributed along the current path. These serve as current filaments and lead also to a vanishing longitudinal resistance, while the Hall resistance remains unchanged.

Pulsed-mode operation of nuclear spin polarization in integer quantum Hall systems

2003 ◽  
Vol 18 (1-3) ◽  
pp. 128-129
Author(s):  
T Machida ◽  
T Yamazaki ◽  
K Ikushima ◽  
S Komiyama ◽  
K Muraki ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Nuclear Spin ◽  
Quantum Hall ◽  
Nuclear Spin Polarization ◽  
Mode Operation ◽  
Quantum Hall Systems ◽  
Pulsed Mode ◽  
Integer Quantum

scholarly journals Double nuclear spin relaxation in hybrid quantum Hall systems

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
M. H. Fauzi ◽  
William J. Munro ◽  
Kae Nemoto ◽  
Y. Hirayama
Keyword(s):  
Spin Relaxation ◽  
Nuclear Spin ◽  
Quantum Hall ◽  
Nuclear Spin Relaxation ◽  
Quantum Hall Systems
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