Berlin 2024 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 32: Spin Phenomena in Semiconductors

HL 32.2: Talk

Wednesday, March 20, 2024, 15:15–15:30, EW 015

Long-Range Proximity Effect in Magnetite Hybrid Ferromagnet-Semiconductor — Ina Kalitukha^1,2, •Eyüp Yalcin¹, Olga Ken^1,2, Vladimir Korenev^1,2, Ilya Akimov^1,2, Carolin Harkort¹, Grigorii Dimitriev², Dennis Kudlacik¹, Victor Sapega², Vitalie Nedelea¹, Evgeny Zhukov^1,2, Dmitri Yakovlev^1,2, Al Banshchikov², Andrey Kaveev^2,3, Grzegorz Karczewski⁴, Tomasz Wojtowicz⁵, Martina Müller⁶, and Manfred Bayer¹ — ¹Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany — ²St. Petersburg, Russia — ³St. Petersburg, Russia — ⁴Institute of Physics, Polish Academy of Sciences, PL-02668 Warsaw, Poland — ⁵International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences, PL-02668 Warsaw, Poland — ⁶Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany

We studied long-range proximity effect in hybrid ferromagnet-semiconductor structure between the ferromagnetic (FM) semimetal magnetite (Fe₃O₄) layer and CdTe quantum well (QW) using time-integrated and time-resolved photoluminescence (PL) spectroscopy techniques. The magnetite FM layer and a CdTe QW are separated by a 10 nm thick (Cd,Mg)Te barrier. The proximity effect is manifested in the circularly polarized photoluminescence corresponding to the recombination of photoexcited electrons with holes bound to shallow acceptors in the QW induced by the FM layer.

Keywords: hybrid structure; magnetic proximity effect; magnetite; spin dynamic; exchange interaction