Magneto-optical study of interface mixing in the CdTe-(Cd,Mn)Te system

Gaj, J. A.; Grieshaber, W.; Bodin-Deshayes, C.; Cibert, J.; Feuillet, G.; d’Aubigné, Y. Merle; Wasiela, A.

doi:10.1103/physrevb.50.5512

Cited by 267 publications

(195 citation statements)

References 36 publications

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“…This splitting is proportional to the average magnetization of the Mn spin in the semimagnetic semiconductor [4,5], which is given by…”

Section: Magnetization Effectsmentioning

confidence: 99%

“…Three kinds of interface profiles (governed by growth conditions of the QW) are analyzed: error function (related to diffusion); exponential (segregation); and the abrupt picture [4,5,7].…”

Section: Ag Imentioning

confidence: 99%

“…When a magnetic field is applied to these heterostructures, the alignment of the carriers leads to a spin splitting which is much larger then the Zeeman one (≈ 100 times the usual value of g = 0.5), inducing the so-called giant Zeeman effect of the band edges [5]. In these systems, the strain due to the lattice mismatch, as well as the external applied magnetic field, can be considered as additional parameters for tailoring the electronic properties of semiconductors devices.…”

Section: Introductionmentioning

confidence: 99%

“…The existing works in literature on the study of gradual interfaces in CdTe/Cd 1−x Mn x Te quantum wells show that occurs a broadening of the exciton energy spectrum due to the existence of well width fluctuations [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Stark effect in CdTe/Cd1-xMn xTe strained double quantum wells

Freire¹,

Farias²,

Silva³

2004

Braz. J. Phys.

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We report a detailed analysis of how the existence of interface roughness can change exciton localization in CdTe/Cd 1−x Mn x Te strained double quantum wells (DQW's) taking into account magnetic and electric field effects. We consider that the potential, effective mass, and the intrinsic magnetization are dependent on the profile of the Mn molar fraction at the interfacial region. Results obtained with CdTe/Cd0.68Mn0.32Te DQW's show that the energy band tailoring generated by the strain and the Zeeman effect is responsible by a displacement of the exciton energy peaks and that small changes in the interface width (10Å) can be responsible for a 30 meV exciton energy broadening.

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“…This splitting is proportional to the average magnetization of the Mn spin in the semimagnetic semiconductor [4,5], which is given by…”

Section: Magnetization Effectsmentioning

confidence: 99%

“…Three kinds of interface profiles (governed by growth conditions of the QW) are analyzed: error function (related to diffusion); exponential (segregation); and the abrupt picture [4,5,7].…”

Section: Ag Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stark effect in CdTe/Cd1-xMn xTe strained double quantum wells

Freire¹,

Farias²,

Silva³

2004

Braz. J. Phys.

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“…The magnetic field in our model just induces the magnetization on the sample, which is proportional, in turn, to the average spin Ŝ of the magnetic ions appearing in (2). In the calculations that are presented below we use the parameterization of the value Ŝ in real DMS structures, given in [16].…”

Section: Figmentioning

confidence: 99%

Diluted magnetic semiconductor quantum dots: An extreme sensitivity of the hole Zeeman splitting on the aspect ratio of the confining potential

Kyrychenko

Kossut

2004

Phys. Rev. B

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Diluted magnetic semiconductor quantum dots: an extreme sensitivity of the hole Zeeman splitting on the aspect ratio of the confining potential The valence band states confined in infinitely deep quantum dots made of diluted magnetic semiconductors (DMS) are considered theoretically. A complex anisotropic structure of the valence bands in DMSs with cubic symmetry described by the full Luttinger Hamiltonian is taken into account. It is found that the Zeeman splitting is very sensitive to the shape of the confining potential and, in particular, to its orientation relative to the direction of an external magnetic field. This sensitivity has its origin in a mixing of different spin components of a hole wave function which takes place for finite hole wave vectors k. Several consequences of the effect are discussed, including a possibility to control the inter-dot tunneling by an external magnetic field. It is shown also that the polarizations of optical transitions in a single DMS quantum dot depend on details of geometry of its confining potential as well as on the strength of the magnetic field.

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Spin Conserving Tunneling in Asymmetric Double Quantum Well Structures

Kłopotowski

Nawrocki

Maćkowski

et al. 2002

phys. stat. sol. (b)

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We present cw studies of exciton tunneling performed on CdTe-based asymmetric double quantum well structure. With the use of a semimagnetic semiconductor QW in magnetic field, we are able to align the carriers' spins before the tunneling. Using a polarization resolved photoluminescence excitation technique we obtain information on the efficiency of the transfer as well as its polarization memory. We record a transfer of spin polarization between quantum wells accounting for a 10% degree of polarization of photoluminescence.

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Magneto-optical study of interface mixing in the CdTe-(Cd,Mn)Te system

Cited by 267 publications

References 36 publications

Stark effect in CdTe/Cd1-xMn xTe strained double quantum wells

Stark effect in CdTe/Cd1-xMn xTe strained double quantum wells

Diluted magnetic semiconductor quantum dots: An extreme sensitivity of the hole Zeeman splitting on the aspect ratio of the confining potential

Spin Conserving Tunneling in Asymmetric Double Quantum Well Structures

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