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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

(p.78) 5 Introduction to superconductivity
The Physics of Nanoelectronics

Tero T. Heikkilä

Oxford University Press

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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