12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Negative Length Orbits in Normal-Superconductor...
View graph of relations

« Back

Negative Length Orbits in Normal-Superconductor Billiard Systems.

Research output: Contribution to journalJournal article

Published

Journal publication date2000
JournalPhysical Review Letters
Journal number17
Volume85
Number of pages4
Pages3704-3707
Original languageEnglish

Abstract

The path-length spectra of mesoscopic systems including diffractive scatterers and connected to a superconductor are studied theoretically. We show that the spectra differ fundamentally from that of normal systems due to the presence of Andreev reflection. It is shown that negative path lengths should arise in the spectra as opposed to the normal system. To highlight this effect we carried out both quantum mechanical and semiclassical calculations for the simplest possible diffractive scatterer. The most pronounced peaks in the path-length spectra of the reflection amplitude are identified by the routes that the electron and/or hole travels.