Goryca M, Ferrand D, Kossacki P, Nawrocki M, Pacuski W, Maślana W, Gaj JA, Tatarenko S, Cibert J, Wojtowicz T, Karczewski G. Magnetization dynamics down to a zero field in dilute (Cd,Mn)Te quantum wells.
PHYSICAL REVIEW LETTERS 2009;
102:046408. [PMID:
19257452 DOI:
10.1103/physrevlett.102.046408]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2008] [Indexed: 05/27/2023]
Abstract
The evolution of the magnetization in (Cd,Mn)Te quantum wells after a short pulse of magnetic field was determined from the giant Zeeman shift of spectroscopic lines. The dynamics in the absence of a static magnetic field was found to be up to 3 orders of magnitude faster than that at 1 T. Hyperfine interaction and strain are mainly responsible for the fast decay. The influence of a hole gas is clearly visible: at zero field anisotropic holes stabilize the system of Mn ions, while in a magnetic field of 1 T they are known to speed up the decay by opening an additional relaxation channel.
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