Effective-mass superlattice as a ballistic transport element

2007 ◽  
Author(s):  
M.V. Klymenko ◽  
I.M. Safonov ◽  
I.A. Sukhoivanov ◽  
R. Michalzik
Keyword(s):  
Effective Mass ◽  
Ballistic Transport

PERFORMANCE COMPARISON OF SCALED III-V AND Si BALLISTIC NANOWIRE MOSFETs

2009 ◽  
Vol 19 (01) ◽  
pp. 15-22
Author(s):  
LINGQUAN (DENNIS) WANG ◽  
BO YU ◽  
PETER M. ASBECK ◽  
YUAN TAUR ◽  
MARK RODWELL
Keyword(s):  
Effective Mass ◽  
Density Of States ◽  
Ballistic Transport ◽  
Gate Oxide ◽  
Oxide Thickness ◽  
Performance Comparison ◽  
Electron Velocity ◽  
Ballistic Limit ◽  
Saturation Current ◽  
Nanowire Mosfets

This paper describes analysis and simulations of Si and III-V Gate-All-Around nanowire MOSFETS assuming ballistic or quasi-ballistic transport. It is found that either channel material can provide the higher saturation current depending on the oxide thickness. For effective oxide thickness above approximately 0.5nm, the higher electron velocity of III-V's outweighs the higher density of states available in the Si device associated with higher effective mass and valley degeneracy and result in higher current for the III-V device. However, materials with higher effective mass and valley degeneracy result in smaller on-resistance in ballistic limit. Depending on the gate oxide capacitance, valley degeneracy may influence the attainable saturation current in a positive or negative way.

Long-range ballistic transport mechanisms in superconducting spintronics

2016 ◽  
Vol 186 (6) ◽  
pp. 640-646
Author(s):  
Alexei V. Samokhvalov ◽  
Alexander S. Mel'nikov ◽  
Alexander I. Buzdin
Keyword(s):  
Long Range ◽  
Ballistic Transport ◽  
Transport Mechanisms

Adiabatic large polarons in anisotropic molecular crystals

2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj
Keyword(s):  
Energy Transfer ◽  
Effective Mass ◽  
Molecular Crystals ◽  
Single Chain ◽  
Proper Understanding ◽  
One Dimensional ◽  
Interchain Coupling ◽  
Large Polaron ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.

Nanoscale transistors

2017 ◽  
Author(s):  
Sandip Tiwari
Keyword(s):  
Field Effect Transistors ◽  
Ballistic Transport ◽  
Dimensional Change ◽  
Real Space ◽  
Operational Characteristics ◽  
Statistical Variations ◽  
Channel Transport ◽  
And Control ◽  
Long Channel ◽  
Detailed Nature

This chapter brings together the physical underpinnings of field-effect transistors operating in their nanoscale limits. It tackles the change in dominant behavior from scattering-limited long-channel transport to mesoscopic and few scattering events limits in quantized channels. It looks at electrostatics and a transistor’s controllability as dimensions are shrunk—the interplay of geometry and control—and then brings out the operational characteristics in “off”-state, e.g., the detailed nature of insulator’s implications or threshold voltage’s statistical variations grounded in short-range and long-range effects, and “on”-state, where quantization, quantized channels, ballistic transport and limited scattering are important. It also explores the physical behavior for zero bandgap and monoatomic layer materials by focusing on real-space and reciprocal-space funneling as one of the important dimensional change consequences through a discussion of parasitic resistances.

Three-terminal bistable switches in effective-mass superlattices

1988 ◽  
Vol 24 (1) ◽  
pp. 64-65 ◽  
Author(s):  
A. Aishima ◽  
Y. Fukushima
Keyword(s):  
Effective Mass

Ballistic transport and quantum interference in InSb nanowire devices

2017 ◽  
Vol 26 (2) ◽  
pp. 027305 ◽  
Author(s):  
Sen Li ◽  
Guang-Yao Huang ◽  
Jing-Kun Guo ◽  
Ning Kang ◽  
Philippe Caroff ◽  
...  
Keyword(s):  
Quantum Interference ◽  
Ballistic Transport

Effective masses in a dense fermion background — Applied to neutrinos, dark matter and dark energy

2014 ◽  
Vol 29 (21) ◽  
pp. 1444010
Author(s):  
Bruce H. J. McKellar ◽  
T. J. Goldman ◽  
G. J. Stephenson
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Scalar Field ◽  
Effective Mass ◽  
Negative Pressure ◽  
Expectation Value ◽  
Effective Masses ◽  
Neutrino Astrophysics

If fermions interact with a scalar field, and there are many fermions present the scalar field may develop an expectation value and generate an effective mass for the fermions. This can lead to the formation of fermion clusters, which could be relevant for neutrino astrophysics and for dark matter astrophysics. Because this system may exhibit negative pressure, it also leads to a model of dark energy.

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