scholarly journals Lead‐Dominated Hyperfine Interaction Impacting the Carrier Spin Dynamics in Halide Perovskites

2021 ◽  
pp. 2105263
Author(s):  
Erik Kirstein ◽  
Dmitri R. Yakovlev ◽  
Mikhail M. Glazov ◽  
Eiko Evers ◽  
Evgeny A. Zhukov ◽  
...  
Keyword(s):  
Hyperfine Interaction ◽  
Spin Dynamics ◽  
Halide Perovskites

Electron spin dynamics in Ce3+ : YAG crystals: Hyperfine interaction of 4f and 5d electrons

2019 ◽  
Vol 99 (2) ◽  
Author(s):  
P. Liang ◽  
Z. Wu ◽  
Y. Y. Zhang ◽  
R. R. Hu ◽  
T. Q. Jia ◽  
...  
Keyword(s):  
Hyperfine Interaction ◽  
Electron Spin ◽  
Spin Dynamics ◽  
Electron Spin Dynamics

Electron Spin Relaxation Beyond the Hyperfine Interaction

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Hyperfine Interaction ◽  
Nuclear Spin ◽  
Spin Dynamics ◽  
Electron Interaction ◽  
Spin Polaron ◽  
Spin Orientation ◽  
Deep Impurity ◽  
Electron Spin Relaxation ◽  
Future Studies ◽  
Ordered State

Here, some prospects for future studies in the field of electron and nuclear spin dynamics are outlined. In contrast to previous chapters where the electron interaction with multitude of nuclei was discussed, in Chapter 8 particular emphasis is put on a situation where hyperfine interaction is so strong that it leads to a qualitative rear rangement of the energy spectrum resulting in coherent excitation transfer between electron and nucleus. The strong coupling between the spin of the charge carrier and of the nucleus is realized; e.g., in the case of deep impurity centers in semiconductors or in isotopically purified systems. We also discuss the effect of the nuclear spin polaron; that is, the ordered state, where the carrier spin orientation results in alignment of spins of the nucleus interacting with the electron or hole. Such problems have been briefly discussed in the literature but, in our opinion, call for in-depth investigation.

Electron & Nuclear Spin Dynamics in Semiconductor Nanostructures

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Solid State ◽  
Hyperfine Interaction ◽  
Electron Spin ◽  
Spin Exchange ◽  
Spin Dynamics ◽  
Mode Locking ◽  
Nuclear Spins ◽  
Spin Effects ◽  
Relaxation Effects ◽  
Dynamical Nuclear Polarization

In recent years, the physics community has experienced a revival of interest in spin effects in solid state systems. On one hand, solid state systems, particularly semicon- ductors and semiconductor nanosystems, allow one to perform benchtop studies of quantum and relativistic phenomena. On the other hand, interest is supported by the prospects of realizing spin-based electronics where the electron or nuclear spins can play a role of quantum or classical information carriers. This book aims at rather detailed presentation of multifaceted physics of interacting electron and nuclear spins in semiconductors and, particularly, in semiconductor-based low-dimensional structures. The hyperfine interaction of the charge carrier and nuclear spins increases in nanosystems compared with bulk materials due to localization of electrons and holes and results in the spin exchange between these two systems. It gives rise to beautiful and complex physics occurring in the manybody and nonlinear system of electrons and nuclei in semiconductor nanosystems. As a result, an understanding of the intertwined spin systems of electrons and nuclei is crucial for in-depth studying and control of spin phenomena in semiconductors. The book addresses a number of the most prominent effects taking place in semiconductor nanosystems including hyperfine interaction, nuclear magnetic resonance, dynamical nuclear polarization, spin-Faraday and -Kerr effects, processes of electron spin decoherence and relaxation, effects of electron spin precession mode-locking and frequency focusing, as well as fluctuations of electron and nuclear spins.

Hyperfine Interaction of Electron and Nuclear Spins

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Hyperfine Interaction ◽  
Hyperfine Coupling ◽  
Spin Dynamics ◽  
Magnetic Interaction ◽  
Nuclear Spins ◽  
Complex Situation ◽  
Fermi Contact Interaction ◽  
Fermi Contact ◽  
Hyperfine Interaction Parameters

This chapter discusses the key interaction–hyperfine coupling–which underlies most of phenomena in the field of electron and nuclear spin dynamics. This interaction originates from magnetic interaction between the nuclear and electron spins. For conduction band electrons in III–V or II–VI semiconductors, it is reduced to a Fermi contact interaction whose strength is proportional to the probability of finding an electron at the nucleus. A more complex situation is realized for valence band holes where hole Bloch functions vanish at the nuclei. Here the hyperfine interaction is of the dipole–dipole type. The modification of the hyperfine coupling Hamiltonian in nanosystems is also analyzed. The chapter contains also an overview of experimental data aimed at determination of the hyperfine interaction parameters in semiconductors and semiconductor nanostructures.

Experimental Evidence of the Hyperfine Interaction between Hole and Nuclear Spins in InAs/GaAs Quantum Dots

2009 ◽  
Vol 1183 ◽  
Author(s):  
Benoit Eble ◽  
Christophe Testelin ◽  
Pascal Desfonds ◽  
Frederic Bernardot ◽  
Andrea Balocchi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Hyperfine Interaction ◽  
Close Agreement ◽  
Spin Dynamics ◽  
Induced Circular Dichroism ◽  
Nuclear Spins ◽  
Pump Probe ◽  
Dephasing Time ◽  
Spin Dephasing

AbstractThe spin dynamics of resident holes in singly p-doped InAs/GaAs quantum dots is studied by pump-probe photo-induced circular dichroism experiments. We show that the hole spin dephasing is controlled by the hyperfine interaction between the hole spin and nuclear spins. We find a characteristic hole spin dephasing time of 12 ns, in close agreement with our calculations based on a dipole-dipole coupling between the hole and the quantum dot nuclei. Finally we demonstrate that a small external magnetic field, typically 10 mT, quenches the hyperfine hole spin dephasing.

scholarly journals Dynamic polaronic screening for anomalous exciton spin relaxation in two-dimensional lead halide perovskites

2020 ◽  
Vol 6 (47) ◽  
pp. eabb7132
Author(s):  
Weijian Tao ◽  
Qiaohui Zhou ◽  
Haiming Zhu
Keyword(s):  
Spin Dynamics ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Coulomb Interactions ◽  
Strong Light ◽  
Exciton Interaction ◽  
Metal Dichalcogenides ◽  
Excitonic Interactions ◽  
Halide Perovskites ◽  
Lead Halide

Two-dimensional lead halide perovskites with confined excitons have shown exciting potentials in optoelectronic applications. It is intriguing but unclear how the soft and polar lattice redefines excitons in layered perovskites. Here, we reveal the intrinsic exciton properties by investigating exciton spin dynamics, which provides a sensitive probe to exciton coulomb interactions. Compared to transition metal dichalcogenides with comparable exciton binding energy, we observe orders of magnitude smaller exciton-exciton interaction and, counterintuitively, longer exciton spin lifetime at higher temperature. The anomalous spin dynamics implies that excitons exist as exciton polarons with substantially weakened inter- and intra-excitonic interactions by dynamic polaronic screening. The combination of strong light matter interaction from reduced dielectric screening and weakened inter-/intra-exciton interaction from dynamic polaronic screening explains their exceptional performance and provides new rules for quantum-confined optoelectronic and spintronic systems.

Sign in / Sign up

Export Citation Format

Share Document