scholarly journals Spectroscopical analyis of strained silicon quantum wells

2005 ◽  
Author(s):  
J. McCarthy ◽  
E. Ni Mhuircheartaigh ◽  
K. Lyutovich ◽  
M. Oehme ◽  
T. S. Perova ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Strained Silicon

Minigaps in strained silicon quantum wells on tilted substrates

1999 ◽  
Vol 17 (4) ◽  
pp. 1757 ◽  
Author(s):  
T. J. Thornton ◽  
F. Ge ◽  
A. Andresen ◽  
D. Pivin ◽  
J. Bird ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Strained Silicon

Cryogenic field effect transistors using strained silicon quantum wells in Si:SiGe heterostructures grown by APCVD

2001 ◽  
Vol 87 (3) ◽  
pp. 277-281 ◽  
Author(s):  
M.J Rack ◽  
T.J Thornton ◽  
D.K Ferry ◽  
Jeff Roberts ◽  
Richard C Westhoff ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Strained Silicon

Germanium islands embedded in strained silicon quantum wells grown on patterned substrates

2002 ◽  
Vol 33 (7) ◽  
pp. 525-529 ◽  
Author(s):  
A Beyer ◽  
E Müller ◽  
H Sigg ◽  
S Stutz ◽  
C David ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Strained Silicon ◽  
Patterned Substrates

scholarly journals Valley splitting in strained silicon quantum wells

2004 ◽  
Vol 84 (1) ◽  
pp. 115-117 ◽  
Author(s):  
Timothy B. Boykin ◽  
Gerhard Klimeck ◽  
M. A. Eriksson ◽  
Mark Friesen ◽  
S. N. Coppersmith ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Strained Silicon ◽  
Valley Splitting

Quantum wires in strained silicon quantum wells on tilted substrates

2000 ◽  
Vol 28 (5-6) ◽  
pp. 369-376 ◽  
Author(s):  
M.J. Rack ◽  
T.J. Thornton ◽  
D.K. Ferry
Keyword(s):  
Quantum Wells ◽  
Quantum Wires ◽  
Strained Silicon

Quantum confinement effects in strained silicon‐germanium alloy quantum wells

1992 ◽  
Vol 60 (17) ◽  
pp. 2135-2137 ◽  
Author(s):  
X. Xiao ◽  
C. W. Liu ◽  
J. C. Sturm ◽  
L. C. Lenchyshyn ◽  
M. L. W. Thewalt ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Silicon Germanium ◽  
Quantum Confinement ◽  
Strained Silicon ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Germanium Alloy

Valley splitting in strained silicon quantum wells modeled with 2° miscuts, step disorder, and alloy disorder

2007 ◽  
Vol 90 (9) ◽  
pp. 092109 ◽  
Author(s):  
Neerav Kharche ◽  
Marta Prada ◽  
Timothy B. Boykin ◽  
Gerhard Klimeck
Keyword(s):  
Quantum Wells ◽  
Strained Silicon ◽  
Valley Splitting ◽  
Alloy Disorder

Characterization of GaAs/AlGaAs quantum wells and quantum wires by chemical lattice imaging

1994 ◽  
Vol 52 ◽  
pp. 736-737
Author(s):  
A. Carlsson ◽  
J.-O. Malm ◽  
A. Gustafsson
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Quantum Wires ◽  
Vapour Phase ◽  
Quantitative Information ◽  
Lattice Imaging ◽  
Vapour Phase Epitaxy ◽  
Metalorganic Vapour Phase Epitaxy ◽  
High Resolution Images

In this study a quantum well/quantum wire (QW/QWR) structure grown on a grating of V-grooves has been characterized by a technique related to chemical lattice imaging. This technique makes it possible to extract quantitative information from high resolution images.The QW/QWR structure was grown on a GaAs substrate patterned with a grating of V-grooves. The growth rate was approximately three monolayers per second without growth interruption at the interfaces. On this substrate a barrier of nominally Al0.35 Ga0.65 As was deposited to a thickness of approximately 300 nm using metalorganic vapour phase epitaxy . On top of the Al0.35Ga0.65As barrier a 3.5 nm GaAs quantum well was deposited and to conclude the structure an additional approximate 300 nm Al0.35Ga0.65 As was deposited. The GaAs QW deposited in this manner turns out to be significantly thicker at the bottom of the grooves giving a QWR running along the grooves. During the growth of the barriers an approximately 30 nm wide Ga-rich region is formed at the bottom of the grooves giving a Ga-rich stripe extending from the bottom of each groove to the surface.

Characterisation of multilayer materials using a position-sensitive atom probe

1990 ◽  
Vol 48 (4) ◽  
pp. 624-625
Author(s):  
RAD Mackenzie ◽  
G D W Smith ◽  
A. Cerezo ◽  
J A Liddle ◽  
CRM Grovenor ◽  
...  
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Spatial Information ◽  
Chemical Vapour ◽  
Atom Probe ◽  
Organic Chemical ◽  
Growth Stages ◽  
Multiple Quantum ◽  
Quartz Wool ◽  
Position Sensitive

The position sensitive atom probe (POSAP), described briefly elsewhere in these proceedings, permits both chemical and spatial information in three dimensions to be recorded from a small volume of material. This technique is particularly applicable to situations where there are fine scale variations in composition present in the material under investigation. We report the application of the POSAP to the characterisation of semiconductor multiple quantum wells and metallic multilayers.The application of devices prepared from quantum well materials depends on the ability to accurately control both the quantum well composition and the quality of the interfaces between the well and barrier layers. A series of metal organic chemical vapour deposition (MOCVD) grown GaInAs-InP quantum wells were examined after being prepared under three different growth conditions. These samples were observed using the POSAP in order to study both the composition of the wells and the interface morphology. The first set of wells examined were prepared in a conventional reactor to which a quartz wool baffle had been added to promote gas intermixing. The effect of this was to hold a volume of gas within the chamber between growth stages, leading to a structure where the wells had a composition of GalnAsP lattice matched to the InP barriers, and where the interfaces were very indistinct. A POSAP image showing a well in this sample is shown in figure 1. The second set of wells were grown in the same reactor but with the quartz wool baffle removed. This set of wells were much better defined, as can be seen in figure 2, and the wells were much closer to the intended composition, but still with measurable levels of phosphorus. The final set of wells examined were prepared in a reactor where the design had the effect of minimizing the recirculating volume of gas. In this case there was again further improvement in the well quality. It also appears that the left hand side of the well in figure 2 is more abrupt than the right hand side, indicating that the switchover at this interface from barrier to well growth is more abrupt than the switchover at the other interface.

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