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The Physics of NanoelectronicsTransport and Fluctuation Phenomena at Low Temperatures$
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Tero T. Heikkilä

Print publication date: 2013

Print ISBN-13: 9780199592449

Published to Oxford Scholarship Online: December 2013

DOI: 10.1093/acprof:oso/9780199592449.001.0001

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Introduction to superconductivity

Introduction to superconductivity

Chapter:
(p.78) 5 Introduction to superconductivity
Source:
The Physics of Nanoelectronics
Author(s):

Tero T. Heikkilä

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199592449.003.0005

This chapter discusses the main phenomena related to superconductivity. It explains the basics of the BCS theory and applies it in calculating the superconducting density of states and describing the Andreev reflection. It introduces Feynman's picture of the Josephson effect, allowing the derivation of the dc and ac Josephson relations. The microscopic theory of Andreev reflection is then connected to the description of Andreev bound states and the associated supercurrent through superconducting contacts. The chapter ends with a short description of the superconducting proximity effect that needs to be taken into account in mesoscopic superconducting systems.

Keywords:   superconductivity, BCS theory, Andreev reflection, Andreev bound states, supercurrent, Josephson effect

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