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Article
An SNP map of human chromosome 22
The human genome sequence will provide a reference for measuring DNA sequence variation in human populations. Sequence variants are responsible for the genetic component of individuality, including complex cha...
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Chapter and Conference Paper
Classical and quantum transport calculations for elastically scattered free electron gases in 2D nanostructures when B=0
The Boltzmann equation in the relaxation time approximation is used to calculate formal expressions for the local electrical, thermal and thermoelectric transport coefficients of a strictly 2D, elastically sca...
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Chapter
Application of the Local Chemical Potential to the Quantum Hall Effect in a Ballistic Quantum Wire
We have recently made calculations of the Hall resistance of a ballistic two-dimensional electron gas confined in a quantum wire by hard walls (Chu and Butcher 1993 a and b). The calculations are made in the l...
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Chapter
The Thermoelectric Behaviour of two Dimensional Electron and Hole Gases and Quantum Point Contacts
Considerable progress has been made over the last ten years in understanding the thermoelectric behaviour of low dimensional transport systems. There are two regimes to consider. At low temperatures (below abo...
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Chapter
Theory of Electron Transport in Low-Dimensional Semiconductor Structures
Low-dimensional semiconductor structures have interesting transport properties. Several methods have been developed for investigating them from a theoretical point of view. Here we discuss Boltzmann transport ...
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Chapter and Conference Paper
Hop** Transport in One-Dimensional Semiconductor Systems
The channel conductance of a one-dimensional MOSFET shows reproducible irregular structure as a function of gate voltage when the device is operated near threshold at low temperatures. The voltage scale on whi...
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Chapter
Electron and Phonon Instabilities
Electron and phonon instabilities of many types occur in solids. Displacive phase transitions in which an atom changes its position in the unit cell of a crystal come about because a phonon mode goes soft and ...
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Chapter
The Theory of Electron Transport in Crystalline Semiconductors
We are concerned in this chapter with the transport of electric charge and heat by electrons in crystalline semiconductors. When the crystal is in uniform thermal equilibrium the distribution of electrons over...
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Chapter and Conference Paper
Hop** Conduction in n-GaAs at High Frequencies and High Magnetic Fields
The hop** conductivity of n-GaAs is studied using n+n n+ mesa structures, with the n layer about 1 μm thick, for frequencies up to 100 MHz and magnetic fields up to 5T. Results are discussed in terms of recent ...
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Chapter and Conference Paper
Epa Analysis of Frequency Dependent Loss Data For a-Ge and a-Si
There have recently been several improvements of ac Hop** conductivity theory. Movaghar and co-workers 1,2 Develop a rndom walk model. In the “extended pair approximation” Summerfield and Butcher3,4 analyse the...
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Chapter
Hop** Transport in Tetrahedrally Bonded Amorphous Films Via States Near the Fermi Level
The unified theory of ac and dc hop** conductivity involving electron states near the Fermi level is reviewed and used to interpret recent data for sputtered films of pure and hydrogenated a-Ge and a-Si.
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Chapter
Transport Theory for Extended and Localized States
The study of electron transport in severely disordered systems is only just beginning. A general understanding of the behavior of simple liquid metals may be obtained from Boltzmann transport theory, which we ...
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Article
Condensed matters for the expert
The Structure and Properties of Matter.
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Chapter and Conference Paper
Random walks on random lattices
The salient features of random walks on random lattices are described and contrasted with those of simpler random walks. The dispersion of an injected carrier sheet is discussed for the case when the ac mobili...
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Chapter
Theory of Hop** Conductivity in Disordered Semiconductors
The semiclassical theory of hop** conductivity in disordered semiconductors is reviewed. The relationship between hop** conductivity and random walks in random systems is described. The randomness of the s...
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Article
Semiconductors
Theory of Electrical Transport Semiconductors.
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Chapter
Theory of the Velocity-Field Characteristic of Semiconductors Exhibiting the Gunn Effect
Recent theoretical work on the velocity-field characteristic of semiconductors exhibiting the Gunn effect is reviewed.
