SPIN-DEPENDENT TRANSMISSION OF ELECTRONS THROUGH THE FERROMAGNETIC METAL BASE OF A HOT-ELECTRON TRANSISTORLIKE SYSTEM

Authors
FILIPE A DROUHIN HJ LAMPEL G LASSAILLY Y NAGLE J PERETTI J SAFAROV VI SCHUHL A
Citation
A. Filipe et al., SPIN-DEPENDENT TRANSMISSION OF ELECTRONS THROUGH THE FERROMAGNETIC METAL BASE OF A HOT-ELECTRON TRANSISTORLIKE SYSTEM, Physical review letters, 80(11), 1998, pp. 2425-2428
Citations number
12
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
11
Year of publication
1998
Pages
2425 - 2428
Database
ISI
SICI code
0031-9007(1998)80:11<2425:STOETT>2.0.ZU;2-N
Abstract
A quasimonoenergetic spin-polarized electron beam, emitted in vacuum f rom a GaAs photocathode, is injected into a thin ferromagnetic metal l ayer deposited on an n-doped GaAs substrate. The current transmitted t hrough this Schottky barrier is measured. The striking feature of this hot-electron transistorlike system is a current gain spin dependency as high as 20%. The measured variations of the current gain and its sp in dependency with the injection energy are well explained by a very s imple analytical model describing the transport of hot electrons in me tallic thin films.