Room temperature photoinduced Faraday rotation in Hg1−xMnxTe alloys at 1550 nm

Ghislotti, G.; Masseroni, C.; Zappettini, A.; Martinelli, Marcelo; Mycielski, A.

doi:10.1063/1.121651

Applied Physics Letters

1998

DOI: 10.1063/1.121651

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Room temperature photoinduced Faraday rotation in Hg1−xMnxTe alloys at 1550 nm

G. Ghislotti¹,

C. Masseroni²,

A. Zappettini³

et al.

Abstract: Faraday rotation of the polarization for a 1550 nm probe beam induced by a pump beam at shorter wavelength is studied in Hg1−xMnxTe semimagnetic semiconductors. Photoinduced rotation decays in a nanosecond timescale and it is related to carrier-induced refractive index saturation. Observed decay is discussed in terms of photoexcited carrier dynamics.

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Cited by 2 publications

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“…DMS nanocrystals are expected to exhibit even more exotic behavior since spinspin exchange interactions should be enhanced by the confinement of the electron and hole [3,4]. Recently, more and more researches [5] based on different semiconductor dot systems, for example ZnMnSe [6], CdMnTe [7], and HgMnTe [8][9][10][11][12], were proposed. Manganese-doped HgTe alloys, a class of attractive semiconducting materials which have zero forbidden gap, offer us a unique opportunity to study the exchange coupling between mobile and localized d electrons.…”

mentioning

confidence: 99%

Controllable electron g-factors in HgMnTe quantum spheres

Zhu

Xia

2008

Europhys. Lett.

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The electronic structure and Landé electron g-factors of manganese-doped HgTe quantum spheres are investigated, in the framework of the eight-band effective-mass model and the mean-field approximation. It is found that the electronic structure evolves continuously from the zero-gap configuration to an open-gap configuration with decreasing radius. The size dependence of electron g-factors is calculated with different Mn-doped effective concentration, magnetic field, and temperature values, respectively. It is found that the variations of electron g-factors are quite different for small and large quantum spheres, due to the strong exchangeinduced interaction and spin-orbit coupling in the narrow-gap DMS nanocrystals. The electron g-factors are zero at a critical point of spherical radius Rc; however, by modulating the nanocrystal size their absolute values can be turned to be even 400 times larger than those in undoped cases.

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mentioning

confidence: 99%

Controllable electron g-factors in HgMnTe quantum spheres

Zhu

Xia

2008

Europhys. Lett.

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Photoionization absorption and zero-field spin splitting of acceptor-bound magnetic polaron in p-type Hg1-xMnxTe single crystals

Zhu

Shao

Lin

et al. 2012

Journal of Applied Physics

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Temperature-dependent magnetic (2–300 K), DC Hall (10–300 K), and infrared transmission (11.5–300 K) measurements are performed on a series of p-type Hg1-xMnxTe (0.12 ≤ x ≤ 0.26) single crystals in the spin-glass regime. Photoionization absorption (PIA) of acceptor-bound magnetic polarons (acceptor-BMPs) is observed to evolve with temperature, which is better accounted for by the classical oscillator model than by the quantum defect method. At low temperatures, p-type Hg1−xMnxTe manifests distinct phenomena of paramagnetic enhancement, negative magnetoresistance, and decrease of the effective binding energy and blueshift of the PIA of the acceptor-BMPs with nearly the same degree as temperature declines. A spin-splitting model is proposed, which can well reproduce the experimentally observed zero-field spin splitting of the acceptor-BMP level at low temperatures and the increase of the spin splitting as temperature drops. The results suggest that the acceptor-BMPs in Hg1−xMnxTe may have potential applications in light-driven polaronic memories, tunable far-infrared lasers, and detectors.

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Room temperature photoinduced Faraday rotation in Hg1−xMnxTe alloys at 1550 nm

Cited by 2 publications

References 16 publications

Controllable electron g-factors in HgMnTe quantum spheres

Controllable electron g-factors in HgMnTe quantum spheres

Photoionization absorption and zero-field spin splitting of acceptor-bound magnetic polaron in p-type Hg1-xMnxTe single crystals

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