Dynamics of a Mn spin coupled to a single hole confined in a quantum dot

Varghese, Bobin; Boukari, H.; Besombes, L.

doi:10.1103/physrevb.90.115307

Cited by 18 publications

(30 citation statements)

References 36 publications

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“…Recent studies emphasized that a small built-in strain induces magnetic anisotropy [15] and a fine structure of the Mn levels. Formally this is described by the term D 0M 2 z and one has…”

Section: The Modelmentioning

confidence: 99%

Light-hole exciton mixing and dynamics in Mn-doped quantum dots

et al. 2016

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We investigate theoretically the spectral and dynamical effects of the short-range exchange interaction between a single manganese (Mn) atom hosted by cylindrical CdTe quantum dots and its light-hole excitons or biexcitons. Our approach is based on the Kohn-Luttinger k · p theory and configuration interaction method, the dynamics of the system in the presence of intraband relaxation being derived from the von Neumann-Lindblad equation. The complex structure of the light-hole exciton absorption spectrum reveals the exchange-induced exciton mixing and depends strongly on the Mn position. In particular, if the Mn atom is closer to the edges of the cylinder, the bright and dark light-hole excitons are mixed by the hole-Mn exchange alone. Consequently, their populations exhibit exchange-induced Rabi oscillations which can be viewed as optical signatures of light-hole spin reversal. Similar results are obtained for mixed biexcitons, in this case the exchange-induced Rabi oscillations being damped by the intraband hole relaxation processes. The effect of light-hole heavy-hole mixing is also discussed.

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“…Recent studies emphasized that a small built-in strain induces magnetic anisotropy [15] and a fine structure of the Mn levels. Formally this is described by the term D 0M 2 z and one has…”

Section: The Modelmentioning

confidence: 99%

Light-hole exciton mixing and dynamics in Mn-doped quantum dots

et al. 2016

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“…Under a positive bias, as we already reported in ref. 24, a single hole is trapped in the magnetic QDs and only the emission of the positively charged exciton is observed ( figure 1(a)). …”

Section: Sample and Experimentsmentioning

confidence: 99%

“…1(c)) 24 . A Boltzmann distribution function P i eMn = e −E i eM n /kB T ef f / i e −E i eM n /kB T ef f with an effective spin temperature T ef f is used to describe the population of the emitting states (electron-Mn energy levels E i eMn ).…”

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

confidence: 99%

“…It corresponds to the optically allowed recombination on the second branch of the Λ system. This recombination occurs with a flip-flop of the electron and Mn spins 24,25 . The energy splitting between the resonant absorption and the emission corresponds to the splitting between the two ground states of the Λ system.…”

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

confidence: 99%

“…It has been shown in charge tunable Mn-doped CdTe/ZnTe QDs that the hybrid Mn-hole spin can be prepared by optical orientation under excitation with circularly polarized light 24 . It was also demonstrated that a positively charged Mn-doped QD forms an ensemble of optical Λ systems that can be independently addressed 25 .…”

Section: Introductionmentioning

confidence: 99%

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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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Nanomaterials for Quantum Information Science and Engineering

et al. 2022

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Quantum information science and engineering (QISE) which entails generation, control and manipulation of individual quantum mechanical states together with nanotechnology have dominated condensed matter physics and materials science research in the 21st century. Solid state devices for QISE have, to this point, predominantly been designed with bulk material as their constituents. In this review, we consider how nanomaterials or low-dimensional materials i.e. materials with intrinsic quantum confinement -may offer inherent advantages over conventional materials for QISE. We identify the materials challenges for specific types of qubits, and we identify how emerging nanomaterials may overcome these challenges. Challenges for and progress towards nanomaterials-based quantum devices are identified. We aim to help close the gap between the nanotechnology and quantum information communities and inspire research that will lead to next-generation quantum devices for scalable and practical quantum applications.

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Dynamics of a Mn spin coupled to a single hole confined in a quantum dot

Cited by 18 publications

References 36 publications

Light-hole exciton mixing and dynamics in Mn-doped quantum dots

Light-hole exciton mixing and dynamics in Mn-doped quantum dots

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

Nanomaterials for Quantum Information Science and Engineering

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