Resonant Inelastic Light Scattering from Quantum Hall Systems

2007 ◽  
pp. 307-341 ◽  
Author(s):  
A. Pinczuk
Keyword(s):  
Light Scattering ◽  
Quantum Hall ◽  
Quantum Hall Systems ◽  
Inelastic Light Scattering

The Spin Excitation Spectrum in Quantum Hall Systems: Insights from Light Scattering Experiments

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1209-1218 ◽  
Author(s):  
YANN GALLAIS ◽  
THOMAS H. KIRSCHENMANN ◽  
JUN YAN ◽  
ARON PINCZUK ◽  
LOREN N. PFEIFFER ◽  
...  
Keyword(s):  
Light Scattering ◽  
Quantum Hall ◽  
Spin Excitation ◽  
Composite Fermions ◽  
Zeeman Energy ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Quantum Hall Systems ◽  
Inelastic Light Scattering ◽  
Spin Excitations

Collective spin excitations in quantum Hall systems are studied via inelastic light scattering. In the fractional quantum Hall effect regime, composite fermion spin excitations are observed in the range 1/3< ν <2/5. They reveal a transition from free to strongly interacting composite fermions. At ν=1, a shift of the spin-wave energy at finite wavevector from the bare Zeeman energy is observed. It allows us to evaluate the spin-stiffness of the quantum Hall ferromagnet.

Inelastic light scattering in the fractional quantum Hall regime: Collapse of the intersubband energy

1992 ◽  
Vol 45 (3) ◽  
pp. 1492-1495 ◽  
Author(s):  
D. Heiman ◽  
A. Pinczuk ◽  
B. S. Dennis ◽  
L. N. Pfeiffer ◽  
K. W. West
Keyword(s):  
Light Scattering ◽  
Quantum Hall ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Inelastic Light Scattering ◽  
Quantum Hall Regime ◽  
Hall Regime

scholarly journals Resonant enhancement of inelastic light scattering in the fractional quantum Hall regime at ν=1/3

2003 ◽  
Vol 127 (12) ◽  
pp. 799-803 ◽  
Author(s):  
C.F. Hirjibehedin ◽  
Irene Dujovne ◽  
I. Bar-Joseph ◽  
A. Pinczuk ◽  
B.S. Dennis ◽  
...  
Keyword(s):  
Light Scattering ◽  
Quantum Hall ◽  
Fractional Quantum ◽  
Resonant Enhancement ◽  
Fractional Quantum Hall ◽  
Inelastic Light Scattering ◽  
Quantum Hall Regime ◽  
Hall Regime

scholarly journals Inelastic Light Scattering by Gap Excitations of Fractional Quantum Hall States at1/3≤ν≤2/3

2000 ◽  
Vol 84 (3) ◽  
pp. 546-549 ◽  
Author(s):  
Moonsoo Kang ◽  
A. Pinczuk ◽  
B. S. Dennis ◽  
M. A. Eriksson ◽  
L. N. Pfeiffer ◽  
...  
Keyword(s):  
Light Scattering ◽  
Quantum Hall ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Inelastic Light Scattering ◽  
Quantum Hall States ◽  
Hall States

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.

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