Thomas Ihn
- Published in print:
- 2009
- Published Online:
- February 2010
- ISBN:
- 9780199534425
- eISBN:
- 9780191715297
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780199534425.003.0018
- Subject:
- Physics, Condensed Matter Physics / Materials
Interaction effects in quantum-confined systems give rise to the Coulomb blockade phenomenon in electronic transport. This chapter discusses the Coulomb blockade phenomenon in quantum dots. As a ...
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Interaction effects in quantum-confined systems give rise to the Coulomb blockade phenomenon in electronic transport. This chapter discusses the Coulomb blockade phenomenon in quantum dots. As a first stage, the phenomenon is explained on a qualitative level. The second part of the chapter discusses the quantum states of a dot isolated from the leads within different approximative schemes, such as the capacitance model complemented with single-particle spectra, Hartree– and Hartree–Fock approximations, and the constant interaction model. The physics of quantum dot helium is discussed in detail as a paradigmatic interacting model system with spin. In the third part of the chapter, transport through quantum dots is discussed in the resonant tunnelling and the sequential tunnelling pictures. The chapter ends with a discussion of cotunneling processes and the Kondo effect.Less
Interaction effects in quantum-confined systems give rise to the Coulomb blockade phenomenon in electronic transport. This chapter discusses the Coulomb blockade phenomenon in quantum dots. As a first stage, the phenomenon is explained on a qualitative level. The second part of the chapter discusses the quantum states of a dot isolated from the leads within different approximative schemes, such as the capacitance model complemented with single-particle spectra, Hartree– and Hartree–Fock approximations, and the constant interaction model. The physics of quantum dot helium is discussed in detail as a paradigmatic interacting model system with spin. In the third part of the chapter, transport through quantum dots is discussed in the resonant tunnelling and the sequential tunnelling pictures. The chapter ends with a discussion of cotunneling processes and the Kondo effect.
S. D. Ganichev and W. Prettl
- Published in print:
- 2005
- Published Online:
- September 2007
- ISBN:
- 9780198528302
- eISBN:
- 9780191713637
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780198528302.003.0009
- Subject:
- Physics, Condensed Matter Physics / Materials
This final chapter presents the most up-to-date information on Bloch oscillations in semiconductor superlattices exposed to intense terahertz radiation. The theoretical background of superlattice ...
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This final chapter presents the most up-to-date information on Bloch oscillations in semiconductor superlattices exposed to intense terahertz radiation. The theoretical background of superlattice transport is discussed including miniband conductance, Wannier-Stark hopping, sequential tunneling, and the interplay between transport mechanisms. This is followed by a detailed description of experiment and theory of THz excitation of superlattices, dynamic localization, negative conductivity, and THz gain in superlattices.Less
This final chapter presents the most up-to-date information on Bloch oscillations in semiconductor superlattices exposed to intense terahertz radiation. The theoretical background of superlattice transport is discussed including miniband conductance, Wannier-Stark hopping, sequential tunneling, and the interplay between transport mechanisms. This is followed by a detailed description of experiment and theory of THz excitation of superlattices, dynamic localization, negative conductivity, and THz gain in superlattices.
Tero T. Heikkilä
- Published in print:
- 2013
- Published Online:
- December 2013
- ISBN:
- 9780199592449
- eISBN:
- 9780191747618
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780199592449.003.0007
- Subject:
- Physics, Condensed Matter Physics / Materials
This chapter discusses the phenomenon of Coulomb blockade, which takes place in small junctions. It first explains conditions of observing Coulomb blockade in single- or multiple junction systems and ...
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This chapter discusses the phenomenon of Coulomb blockade, which takes place in small junctions. It first explains conditions of observing Coulomb blockade in single- or multiple junction systems and then details the orthodox theory of single-electron tunnelling, which consists of calculating the tunnelling rates and using them in a master equation for the charge states. This theory allows understanding of the properties of a single-electron transistor. The higher-order cotunneling is explained briefly. The phenomenon of dynamical Coulomb blockade arising in single junctions placed in high-resistance environments is discussed in detail. The chapter closes by describing main single-electron devices besides the conventional single-electron transistor: Coulomb blockade thermometer, radio frequency single-electron transistor, and a single electron pump.Less
This chapter discusses the phenomenon of Coulomb blockade, which takes place in small junctions. It first explains conditions of observing Coulomb blockade in single- or multiple junction systems and then details the orthodox theory of single-electron tunnelling, which consists of calculating the tunnelling rates and using them in a master equation for the charge states. This theory allows understanding of the properties of a single-electron transistor. The higher-order cotunneling is explained briefly. The phenomenon of dynamical Coulomb blockade arising in single junctions placed in high-resistance environments is discussed in detail. The chapter closes by describing main single-electron devices besides the conventional single-electron transistor: Coulomb blockade thermometer, radio frequency single-electron transistor, and a single electron pump.
