scholarly journals High-mobility AlAs quantum wells with out-of-plane valley occupation

2006 ◽  
Vol 89 (17) ◽  
pp. 172118 ◽  
Author(s):  
K. Vakili ◽  
Y. P. Shkolnikov ◽  
E. Tutuc ◽  
E. P. De Poortere ◽  
M. Padmanabhan ◽  
...  
Keyword(s):  
Quantum Wells ◽  
High Mobility ◽  
Out Of Plane

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 Layer- and gate-tunable spin-orbit coupling in a high-mobility few-layer semiconductor

2021 ◽  
Vol 7 (5) ◽  
pp. eabe2892
Author(s):  
Dmitry Shcherbakov ◽  
Petr Stepanov ◽  
Shahriar Memaran ◽  
Yaxian Wang ◽  
Yan Xin ◽  
...  
Keyword(s):  
Electric Field ◽  
High Mobility ◽  
Orbit Coupling ◽  
Spin Splitting ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Quantum Oscillations ◽  
Out Of Plane ◽  
Order Of Magnitude ◽  
Spin Degeneracy

Spin-orbit coupling (SOC) is a relativistic effect, where an electron moving in an electric field experiences an effective magnetic field in its rest frame. In crystals without inversion symmetry, it lifts the spin degeneracy and leads to many magnetic, spintronic, and topological phenomena and applications. In bulk materials, SOC strength is a constant. Here, we demonstrate SOC and intrinsic spin splitting in atomically thin InSe, which can be modified over a broad range. From quantum oscillations, we establish that the SOC parameter α is thickness dependent; it can be continuously modulated by an out-of-plane electric field, achieving intrinsic spin splitting tunable between 0 and 20 meV. Unexpectedly, α could be enhanced by an order of magnitude in some devices, suggesting that SOC can be further manipulated. Our work highlights the extraordinary tunability of SOC in 2D materials, which can be harnessed for in operando spintronic and topological devices and applications.

Quantum transport in high mobility modulation doped Ga0.25In0.75As/InP quantum wells

1998 ◽  
Vol 84 (4) ◽  
pp. 2112-2122 ◽  
Author(s):  
P. Ramvall ◽  
N. Carlsson ◽  
P. Omling ◽  
L. Samuelson ◽  
W. Seifert ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Quantum Transport ◽  
High Mobility

Development of III-Sb Technology for p-Channel MOSFETs

2014 ◽  
Vol 23 (03n04) ◽  
pp. 1450015 ◽  
Author(s):  
Andrew Greene ◽  
Shailesh Madisetti ◽  
Michael Yakimov ◽  
Vadim Tokranov ◽  
Serge Oktyabrsky
Keyword(s):  
Quantum Wells ◽  
Supply Voltage ◽  
High Mobility ◽  
Hole Mobility ◽  
State Density ◽  
Injection Velocity ◽  
Oxide Interface ◽  
Group Iii ◽  
Multiple Challenges ◽  
Activation Annealing

Alternative channel materials with superior transport properties over conventional silicon based systems are required for supply voltage scaling in CMOS circuits. Group III- Sb 's are a candidate for high mobility p-channel applications due to a low hole effective mass, large injection velocity in scaled devices and the ability to achieve enhanced hole mobility in strained quantum wells (QW). Multiple challenges in antimonide MOSFET development are assessed and developed technologies were implemented into p-channel MOSFET fabrication with a low thermal processing budget of 350°C. These challenges include growth of “bulk” GaSb and bi-axial compressively strained In x Ga 1-x Sb QW channels on lattice mismatched GaAs substrates, reduction of interface trap state density (Dit) at the III- Sb /high-k oxide interface and avoiding ion implanted source and drain contacts with high temperature activation annealing. A “self-aligned” single mask p-channel MOSFET fabrication process was developed on buried In 0.36 Ga 0.64 Sb QW channels using intermetallic source and drain contacts. The first “gate-last” MOSFET process on In 0.36 Ga 0.64 Sb QW channels with pre-grown epitaxial p++- GaSb contacts is demonstrated. InAs has been proven to be an excellent etch stop layer when using an optimized tetramethylammonium hydroxide (TMAH) etch of p++- GaSb to prevent InGaSb QW damage.

Mid-Infrared Photodetector Using Self-Assembled InAs Quantum Dots Embedded in Modulation-Doped GaAs Quantum Wells

1999 ◽  
Vol 607 ◽  
Author(s):  
Seung-Woong Lee ◽  
Kazuhiko Hirakawa ◽  
Yozo Shimada
Keyword(s):  
Quantum Dots ◽  
Quantum Wells ◽  
High Mobility ◽  
Normal Incidence ◽  
Infrared Photodetector ◽  
Inas Quantum Dots ◽  
Operation Temperature ◽  
Long Lifetime ◽  
Quantum Dot Infrared Photodetector ◽  
Self Assembled

AbstractWe have designed and fabricated a quantum dot infrared photodetector which utilizes lateral transport of photoexcited carriers in the modulation-doped A1GaAs/GaAs two-dimensional (2D) channels. A broad photocurrent signal has been observed in the photon energy range of 100–300 meV due to bound-to-continuum intersubband absorption of normal incidence radiation in the self-assembled InAs quantum dots. A peak responsivity was as high as 2.3 A/W. The high responsivity is realized mainly by a high mobility and a long lifetime of photoexcited carriers in the modulation-doped 2D channels. Furthermore, we found that this device has high operation temperature and very high photoconductive gain.

scholarly journals Single-valley high-mobility (110) AlAs quantum wells with anisotropic mass

2008 ◽  
Vol 93 (13) ◽  
pp. 132102 ◽  
Author(s):  
S. Dasgupta ◽  
S. Birner ◽  
C. Knaak ◽  
M. Bichler ◽  
A. Fontcuberta i Morral ◽  
...  
Keyword(s):  
Quantum Wells ◽  
High Mobility

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

Conductance anisotropy of high-mobility, modulation-doped GaAs single quantum wells

2002 ◽  
Vol 13 (2-4) ◽  
pp. 642-645 ◽  
Author(s):  
K.-J Friedland ◽  
R Hey ◽  
O Bierwagen ◽  
H Kostial ◽  
Y Hirayama ◽  
...  
Keyword(s):  
Quantum Wells ◽  
High Mobility ◽  
Single Quantum

(Invited) Low-Temperature Growth of Strained Germanium Quantum Wells for High Mobility Applications

2020 ◽  
Vol 98 (5) ◽  
pp. 215-224
Author(s):  
Stephen W. Bedell ◽  
Sean Hart ◽  
Sarunya Bangsaruntip ◽  
Curtis Durfee ◽  
John A. Ott ◽  
...  
Keyword(s):  
Low Temperature ◽  
Quantum Wells ◽  
High Mobility ◽  
Temperature Growth ◽  
Low Temperature Growth

scholarly journals Donor binding energy and thermally activated persistent photoconductivity in high mobility (001) AlAs quantum wells

2007 ◽  
Vol 91 (14) ◽  
pp. 142120 ◽  
Author(s):  
S. Dasgupta ◽  
C. Knaak ◽  
J. Moser ◽  
M. Bichler ◽  
S. F. Roth ◽  
...  
Keyword(s):  
Binding Energy ◽  
Quantum Wells ◽  
High Mobility ◽  
Persistent Photoconductivity ◽  
Thermally Activated ◽  
Donor Binding Energy
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