Electron paramagnetic resonance of Mn2+ in strained-layer semiconductor superlattices

Qazzaz, M.; Yang, Guilin; Xin, S. H.; Montès, L.; Luo, H.; Furdyna, J. K.

doi:10.1016/0038-1098(95)00373-8

Cited by 46 publications

(52 citation statements)

References 9 publications

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“…The basic spectrum consists of typical hyperfine structure (six lines for 5/2 nuclear spin) and transition between spin levels m s = -1/2 to m s = +1/2 superposed on the wide line. The wide line that is observed in EPR spectrum consists of 4 broaden lines for Mn 2+ , which are described for bulk materials in [29,30] and nanocrystals [31,32] as related with transitions between spin levels m s = -5/2 to m s = -3/2, m s = -3/2 to m s = -1/2 , m s = +1/2 to m s = +3/2, and m s = +3/2 to m s = +3/2. Simultaneously, for the samples with a higher value of x, such as x > 0.01 for bulk crystals and x > 0.08 for nanocrystals, a hyperfine structure is completely quenched, and only a broad signal is observed.…”

Section: Resultsmentioning

confidence: 99%

Comparative studies of optical absorption, photoluminescence and EPR spectra of PbMnI2 bulk layers and nanocrystals

Савчук¹,

Savchuk²,

Stefaniuk³

et al. 2014

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. We report a study of the layered diluted magnetic semiconductor (DMS) were prepared by cooling the boiling saturated aqueous solution to room temperature. The exciton structure of the absorption spectra of nanoparticles exhibits blue shift due to the quantum confinement effect. In photoluminescence spectra of nanocrystals, two main peaks were revealed, which are attributed to the band-edge transitions and defect states. The EPR spectra for bulk layers and nanocrystals consist of an intense broad line and several weak narrow lines that correspond to hyperfine spectra of Mn 2+ ions.

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Section: Resultsmentioning

confidence: 99%

Comparative studies of optical absorption, photoluminescence and EPR spectra of PbMnI2 bulk layers and nanocrystals

Савчук¹,

Savchuk²,

Stefaniuk³

et al. 2014

Semicond. Phys. Quantum Electron. Optoelectron.

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“…Neglecting the tetrahedral crystal field of the CdTe matrix 31,32 , this fine structure is described by the effective spin Hamiltonian…”

Section: Spin Structure Of a Positively Charged Mn-doped Quantummentioning

confidence: 99%

Resonant photoluminescence and dynamics of a hybrid Mn hole spin in a positively charged magnetic quantum dot

2017

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We analyze, through resonant photoluminescence, the spin dynamics of an individual magnetic atom (Mn) coupled to a hole in a semiconductor quantum dot. The hybrid Mn-hole spin and the positively charged exciton in a CdTe/ZnTe quantum dot forms an ensemble of Λ systems which can be addressed optically. Auto-correlation of the resonant photoluminescence and resonant optical pumping experiments are used to study the spin relaxation channels in this multilevel spin system. We identified for the hybrid Mn-hole spin an efficient relaxation channel driven by the interplay of the Mn-hole exchange interaction and the coupling to acoustic phonons. We also show that the optical Λ systems are connected through inefficient spin-flips than can be enhanced under weak transverse magnetic field. The dynamics of the resonant photoluminescence in a p-doped magnetic quantum dot is well described by a complete rate equation model. Our results suggest that long lived hybrid Mn-hole spin could be obtained in quantum dot systems with large heavy-hole/light-hole splitting.

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“…The Hamiltonian of the coupled electronic and nuclear spins of a Mn atom in a strained layer grown along [001] axis is known from magnetic resonance measurements 24 and reads:…”

Section: Dynamics Of a Mn Atom Under A Resonant Laser Fieldmentioning

confidence: 99%

Spin dynamics of a Mn atom in a semiconductor quantum dot under resonant optical excitation

2013

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We analyze the spin dynamics of an individual magnetic atom (Mn) inserted in a II-VI semiconductor quantum dot under resonant optical excitation. In addition to standard optical pumping expected for a resonant excitation, we show that for particular conditions of laser detuning and excitation intensity, the spin population can be trapped in the state which is resonantly excited. This effect is modeled considering the coherent spin dynamics of the coupled electronic and nuclear spin of the Mn atom optically dressed by a resonant laser field. This spin population trapping mechanism is controlled by the combined effect of the coupling with the laser field and the coherent interaction between the different Mn spin states induced by an anisotropy of the strain in the plane of the quantum dot.

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Electron paramagnetic resonance of Mn2+ in strained-layer semiconductor superlattices

Cited by 46 publications

References 9 publications

Comparative studies of optical absorption, photoluminescence and EPR spectra of PbMnI2 bulk layers and nanocrystals

Comparative studies of optical absorption, photoluminescence and EPR spectra of PbMnI2 bulk layers and nanocrystals

Resonant photoluminescence and dynamics of a hybrid Mn hole spin in a positively charged magnetic quantum dot

Spin dynamics of a Mn atom in a semiconductor quantum dot under resonant optical excitation

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