Jump to ContentJump to Main Navigation
The Story of Semiconductors$
Users without a subscription are not able to see the full content.

John W. Orton

Print publication date: 2008

Print ISBN-13: 9780199559107

Published to Oxford Scholarship Online: January 2010

DOI: 10.1093/acprof:oso/9780199559107.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (www.oxfordscholarship.com). (c) Copyright Oxford University Press, 2020. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 12 July 2020

Low dimensional structures

Low dimensional structures

(p.213) Chapter 6 Low dimensional structures
The Story of Semiconductors

John Orton

Oxford University Press

During the 1970s, III-V compounds and epitaxial crystal growth provided the basis for low dimensional structures (or nanostructures). The best known example is a GaAs quantum well within AlGaAs barriers, electrons, and holes being confined in well defined energy levels that determine the optical properties. Quantum wires and dots are also described. The quantum well laser and the vertical cavity laser (VCSEL) show considerable advantages over their heterostructure predecessor. Another exciting development was that of the two-dimensional electron gas (2DEG) at an interface between semiconductors with different band gaps. By doping only the wide gap material so as to separate the doping atoms from the resulting free electrons, ionised impurity scattering can be minimised and extremely high electron mobilities achieved. Such samples led to the discovery of the fractional quantum Hall effect and to high mobility FETs (HEMTs) for microwave applications. Mesoscopic systems and heterojunction bipolar transistors (HBTs) are also described.

Keywords:   low dimensional structure, nanostructure, quantum well, quantum dot, two-dimensional electron gas, fractional quantum Hall effect, laser, HEMT, heterojunction bipolar transistors, mesoscopic system

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .