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Ultrafast probes of nonequilibrium hole spin relaxation in the ferromagnetic semiconductor GaMnAs

TitleUltrafast probes of nonequilibrium hole spin relaxation in the ferromagnetic semiconductor GaMnAs
Publication TypeJournal Article
Year of Publication2015
AuthorsPatz, A, Li, TQ, Liu, XY, Furdyna, JK, Perakis, IE, Wang, JG
JournalPhysical Review B
Volume91
Pagination155108
Date Published04
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000352344300001
Keywords(ga,mn)as, magnetism, magnetooptics, temperature
Abstract

a picosecond hole energy relaxation, on the scale of 1-2 ps; and (iii) a coherent, damped Mn spin precession with a period of 250 ps. The transient amplitude of the hole spin relaxation component diminishes with increasing temperature, directly following the ferromagnetic order of GaMnAs, while the hole energy amplitude shows negligible temperature change. Our results serve to establish the hole spin lifetimes in the ferromagnetic semiconductor GaMnAs, at the same time demonstrating a spectroscopic method for studying nonequilibrium hole spins in the presence of magnetic order and spin-exchange interaction.

DOI10.1103/PhysRevB.91.155108
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