Time-resolved differential transmission in MOVPE-grown ferromagnetic InMnAs

M. Bhowmick; T. R. Merritt; G. A. Khodaparast; Bruce W. Wessels; Stephen A. McGill; D. Saha; X. Pan; G. D. Sanders; C. J. Stanton

doi:10.1103/PhysRevB.85.125313

Time-resolved differential transmission in MOVPE-grown ferromagnetic InMnAs

M. Bhowmick, T. R. Merritt, G. A. Khodaparast^*, Bruce W. Wessels, Stephen A. McGill, D. Saha, X. Pan, G. D. Sanders, C. J. Stanton

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We measured time-resolved differential transmission in InMnAs for different pump/probe schemes as a function of temperature, laser fluence, and external magnetic field. We observed tunability of the carrier relaxation time. In addition, we found that the sign of the differential transmission changed as a function of probe wavelength. The electronic structure for InMnAs was calculated for B=0, using an eight-band k•p model, which includes conduction and valence band mixing as well as coupling of electrons and holes to the magnetic Mn impurities. This allows us to explain some of the carrier dynamics and the sign changes in the differential transmission.

Original language	English (US)
Article number	125313
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.85.125313
State	Published - Mar 27 2012

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.85.125313

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title = "Time-resolved differential transmission in MOVPE-grown ferromagnetic InMnAs",

abstract = "We measured time-resolved differential transmission in InMnAs for different pump/probe schemes as a function of temperature, laser fluence, and external magnetic field. We observed tunability of the carrier relaxation time. In addition, we found that the sign of the differential transmission changed as a function of probe wavelength. The electronic structure for InMnAs was calculated for B=0, using an eight-band k•p model, which includes conduction and valence band mixing as well as coupling of electrons and holes to the magnetic Mn impurities. This allows us to explain some of the carrier dynamics and the sign changes in the differential transmission.",

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AU - Bhowmick, M.

AU - Merritt, T. R.

AU - Khodaparast, G. A.

AU - Wessels, Bruce W.

AU - McGill, Stephen A.

AU - Saha, D.

AU - Pan, X.

AU - Sanders, G. D.

AU - Stanton, C. J.

PY - 2012/3/27

Y1 - 2012/3/27

N2 - We measured time-resolved differential transmission in InMnAs for different pump/probe schemes as a function of temperature, laser fluence, and external magnetic field. We observed tunability of the carrier relaxation time. In addition, we found that the sign of the differential transmission changed as a function of probe wavelength. The electronic structure for InMnAs was calculated for B=0, using an eight-band k•p model, which includes conduction and valence band mixing as well as coupling of electrons and holes to the magnetic Mn impurities. This allows us to explain some of the carrier dynamics and the sign changes in the differential transmission.

AB - We measured time-resolved differential transmission in InMnAs for different pump/probe schemes as a function of temperature, laser fluence, and external magnetic field. We observed tunability of the carrier relaxation time. In addition, we found that the sign of the differential transmission changed as a function of probe wavelength. The electronic structure for InMnAs was calculated for B=0, using an eight-band k•p model, which includes conduction and valence band mixing as well as coupling of electrons and holes to the magnetic Mn impurities. This allows us to explain some of the carrier dynamics and the sign changes in the differential transmission.

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JO - Physical Review B - Condensed Matter and Materials Physics

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Time-resolved differential transmission in MOVPE-grown ferromagnetic InMnAs

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