Enhanced Spin Interactions in Digital Magnetic Heterostructures

S. A. Crooker, D. A. Tulchinsky, J. Levy, D. D. Awschalom, R. Garcia, and N. Samarth
Phys. Rev. Lett. 75, 505 – Published 17 July 1995
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Abstract

A new heterostructure is developed in which fractional monolayers of magnetic ions are introduced “digitally” within a semiconductor quantum well. Rearranging moments within two-dimensional (2D) planes provides additional control over their interactions, yielding tunable two-level electronic systems in which spin splittings are significantly larger than inhomogeneous linewidths in modest magnetic fields. Femtosecond-resolved electronic and magnetic spectroscopies reveal spin-flip scattering dependent only on the Zeeman energy but not the local magnetic environment, and long-lived dynamic magnetizations.

  • Received 5 December 1994

DOI:https://doi.org/10.1103/PhysRevLett.75.505

©1995 American Physical Society

Authors & Affiliations

S. A. Crooker, D. A. Tulchinsky, J. Levy, and D. D. Awschalom

  • Department of Physics, University of California, Santa Barbara, California 93106

R. Garcia and N. Samarth

  • Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802

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Vol. 75, Iss. 3 — 17 July 1995

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