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Buss, C.; Pankoke, René; Leisching, P.; Cibert, J.; Frey, R.; Flytzanis, Christos

doi:10.1103/physrevlett.78.4123

Cited by 49 publications

(31 citation statements)

References 20 publications

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“…The ultrafast dynamics of spins in metallic ferromagnets as well as in magnetic and even nonmagnetic semiconductors [1][2][3][4][5][6] has attracted intense research activity in recent years. In the case of semiconducting materials such as gallium arsenide ͑GaAs͒, essentially low-dimensional systems have been investigated, mostly at low temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Both Faraday and Kerr magneto-optical effects 1,3,6 are indeed well suited to study the spin dynamics in both a broad spectral and thermal range, as well as in a thermal range. In particular, they provide a good alternative to the well-known photoluminescence techniques 5 at wavelengths or temperatures for which there is hardly any measurable luminescence.…”

Section: Introductionmentioning

confidence: 99%

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Room-temperature ultrafast carrier and spin dynamics in GaAs probed by the photoinduced magneto-optical Kerr effect

et al. 2001

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The picosecond and subpicosecond dynamics of spins in intrinsic and n-doped GaAs is investigated at room temperature using the time-resolved, pump and probe, photoinduced, near-resonant magneto-optical Kerr effect between 1.44 and 1.63 eV. Three components with different temporal and spectral behavior are distinguished in both Kerr rotation and ellipticity, and their origin is discussed in relation with theoretical predictions and simulations. Two contributions are attributed to the splitting of the spin sublevels. The first one, present only as long as pump and probe pulses coincide in time, is a coherent response accounted for in terms of the optical Stark effect, whereas the longer decay of the second one, up to 35 ps, is attributed to electron spin relaxation. The third component is assumed to arise from the difference in population of the photoexcited states and decays within a time smaller than the pulse duration, which is attributed to the energy relaxation of electrons towards the bottom of the conduction band through carrier-carrier and carrier-phonon scattering.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Room-temperature ultrafast carrier and spin dynamics in GaAs probed by the photoinduced magneto-optical Kerr effect

et al. 2001

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“…Typeset using REVT E X 1 Control and manipulation of spins by ultrafast optical excitation, which gives rise to photo-induced magnetization change and magnetic phase transitions in dilute magnetic semiconductor quantum structures [1][2][3], doped semiconductors [4] and ferromagnetic metals [6][7][8][9][10], have attracted considerable attention. Recent study on the magnetization dynamics in the photo-excited Ni films with nonlinear optical techniques has revealed ultrafast spin process within 50 fs [9].…”

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confidence: 99%

Ultrafast Spin Dynamics and Critical Behavior in Half-Metallic Ferromagnet:Sr2FeMoO6

et al. 2000

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Ultrafast spin dynamics in ferromagnetic half-metallic compound Sr 2 FeMoO 6 is investigated by pump-probe measurements of magneto-optical Kerr effect.Half-metallic nature of this material gives rise to anomalous thermal insulation between spins and electrons, and allows us to pursue the spin dynamics from a few to several hundred picoseconds after the optical excitation. The optically detected magnetization dynamics clearly shows the crossover from microscopic photo-induced demagnetization to macroscopic critical behavior with universal power law divergence of relaxation time for wide dynamical critical region.Typeset using REVT E X 1

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“…One can also exploit the outstanding performances achieved in molecular beam epitaxial growth of layers of semimagnetic semiconductors such as Cd 1ÿx Mn x Te, with the defect being a quantum well with prescribed spectral characteristics. In such structures giant photoinduced Faraday and magnetooptic Kerr rotation has been evidenced [8,9] in the nonlinear regime; in such structures one must, however, work close to exciton polaritonic resonances, which introduce resonant enhancement but also absorption losses and resonance dynamics which complicates the following discussion in the dispersive regime.…”

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confidence: 99%