Title :
Photoinduced critical slowing down of femtosecond hole spin relaxation in ferromagnetic GaMnAs
Author :
Tianqi Li ; Patz, A. ; Perakis, W.E. ; Xinyu Liu ; Furdyna, J.K. ; Jigang Wang
Author_Institution :
Dept. of Phys. & Astron., Iowa State Univ., Ames, IA, USA
Abstract :
We report for the first time photoinduced femtosecond hole spin dynamics and critical behaviors in a ferromagnetic semiconductor, revealing, in particular, a critical slowing down of hole spin relaxation near ferro- to paramagnetic phase transition.
Keywords :
III-V semiconductors; ferromagnetic materials; ferromagnetic-paramagnetic transitions; gallium arsenide; high-speed optical techniques; magnetic semiconductors; manganese compounds; optical materials; paramagnetic materials; spin dynamics; GaMnAs; femtosecond hole spin relaxation; ferromagnetic semiconductor; ferromagnetic-paramagnetic phase transition; hole spin dynamics; photoinduced critical slowing down; Fluctuations; Manganese; Materials; Optical sensors; Physics; Transient analysis; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2011 Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1223-4
