Time-resolved differential transmission in MOVPE-grown ferromagnetic InMnAs

被引：13

作者：

Bhowmick, M. ^{[1
]}

Merritt, T. R. ^{[1
]}

Khodaparast, G. A. ^{[1
]}

Wessels, Bruce W. ^{[2
]}

McGill, Stephen A. ^{[3
]}

Saha, D. ^{[4
]}

Pan, X. ^{[4
]}

Sanders, G. D. ^{[4
]}

Stanton, C. J. ^{[4
]}

机构：

[1] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA

[2] Northwestern Univ, Mat Res Ctr, Evanston, IL 60208 USA

[3] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[4] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 12期

基金：

美国国家科学基金会;

关键词：

NONLINEAR ABSORPTION; CYCLOTRON-RESONANCE; TEMPERATURE; SPECTROSCOPY; (IN; MN)AS; DYNAMICS; PUMP;

D O I：

10.1103/PhysRevB.85.125313

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：6

共 30 条

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Ashcroft N.W., 1976, SOLID STATE PHYS, P715

[2] NUMERICAL-STUDIES OF FEMTOSECOND CARRIER DYNAMICS IN GAAS [J].