scholarly journals High mobility two-dimensional hole system in GaAs∕AlGaAs quantum wells grown on (100) GaAs substrates

2005 ◽  
Vol 86 (16) ◽  
pp. 162106 ◽  
Author(s):  
M. J. Manfra ◽  
L. N. Pfeiffer ◽  
K. W. West ◽  
R. de Picciotto ◽  
K. W. Baldwin
Keyword(s):  
Quantum Wells ◽  
High Mobility ◽  
Two Dimensional ◽  
Gaas Substrates

scholarly journals Giant magnon spin conductivity approaching the two-dimensional transport regime in ultrathin yttrium iron garnet films

2022 ◽  
Author(s):  
Xiangyang Wei ◽  
Obed Alves Santos ◽  
Cristhian Humberto Sumba Lusero ◽  
Gerrit Bauer ◽  
Jamal Ben Youssef ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Yttrium Iron Garnet ◽  
Chemical Potential ◽  
High Mobility ◽  
Electronic Charge ◽  
Two Dimensional ◽  
Yttrium Iron ◽  
Low Dissipation ◽  
Iron Garnet ◽  
Millikelvin Temperatures

Abstract Conductivities are key material parameters that govern various types of transport (electronic charge, spin, heat etc.) driven by thermodynamic forces. Magnons, the elementary excitations of the magnetic order, flow under the gradient of a magnon chemical potential in proportion to a magnon (spin) conductivity σm. The magnetic insulator yttrium iron garnet (YIG) is the material of choice for efficient magnon spin transport. Here we report an unexpected giant σm in record-thin YIG films with thicknesses down to 3.7 nm when the number of occupied two-dimensional (2D) subbands is reduced from a large number to a few, which corresponds to a transition from 3D to 2D magnon transport. We extract a 2D spin conductivity (≈1 S) at room temperature, comparable to the (electronic) spin conductivity of the high-mobility two-dimensional electron gas in GaAs quantum wells at millikelvin temperatures. Such high conductivities offer unique opportunities to develop low-dissipation magnon-based spintronic devices.

MBE Growth and Characterization of InSb/AlxIn1−xSb Strained Layer Structures

1996 ◽  
Vol 450 ◽  
Author(s):  
K. J. Goldammer ◽  
W. K. Liu ◽  
W. Ma ◽  
M. B. Santos ◽  
R. J. Hauenstein ◽  
...  
Keyword(s):  
Quantum Wells ◽  
High Mobility ◽  
Structural Quality ◽  
Electron Systems ◽  
X Ray Diffraction ◽  
Mbe Growth ◽  
Gaas Substrates ◽  
Layer Structures

ABSTRACTThree types of structures were fabricated using molecular beam epitaxy. High-resolution x-ray diffraction measurements demonstrated the high structural quality of InSb/AlxIn1−xSb superlattices grown on InSb and GaAs substrates. Hall effect data revealed the effect of substrate temperature on autocompensation in InSb δ-doped with Si. Two-dimensional electron systems with a high mobility were realized in InSb quantum wells with AlxIn1−xSb barriers δ-doped with Si.

scholarly journals Contribution of top barrier materials to high mobility in near-surface InAs quantum wells grown on GaSb(001)

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Joon Sue Lee ◽  
Borzoyeh Shojaei ◽  
Mihir Pendharkar ◽  
Mayer Feldman ◽  
Kunal Mukherjee ◽  
...  
Keyword(s):  
Quantum Wells ◽  
High Mobility ◽  
Near Surface ◽  
Barrier Materials

scholarly journals Anisotropic 2D excitons unveiled in organic–inorganic quantum wells

2021 ◽  
Author(s):  
Lorenzo Maserati ◽  
Sivan Refaely-Abramson ◽  
Christoph Kastl ◽  
Christopher T. Chen ◽  
Nicholas J. Borys ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Crystalline Polymer ◽  
Binding Energies ◽  
Two Dimensional ◽  
Metal Chalcogenide

Hybrid layered metal chalcogenide crystalline polymer hosts strongly anisotropic two-dimensional excitons with large binding energies.

scholarly journals Atomically thin InSe: A high mobility two-dimensional material

2017 ◽  
Vol 60 (7) ◽  
pp. 1121-1122 ◽  
Author(s):  
Wei Feng ◽  
Wei Zheng ◽  
Feng Gao ◽  
PingAn Hu
Keyword(s):  
High Mobility ◽  
Two Dimensional

Far-infrared magneto-optical study of two-dimensional electrons and holes in InAs/AlxGa1−xSb quantum wells

1997 ◽  
Vol 55 (3) ◽  
pp. 1617-1636 ◽  
Author(s):  
J. Kono ◽  
B. D. McCombe ◽  
J.-P. Cheng ◽  
I. Lo ◽  
W. C. Mitchel ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Far Infrared ◽  
Two Dimensional ◽  
Optical Study
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