Fluctuations of Electron and Nuclear Spins

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Thermal Equilibrium ◽  
Spin Dynamics ◽  
Spin Systems ◽  
Spin Fluctuations ◽  
Quantum Mechanical ◽  
Nuclear Spins ◽  
Spin Noise ◽  
Stochastic Fluctuations ◽  
Noise Spectroscopy ◽  
Mechanical Nature

In thermal equilibrium, both electron and nuclear spin systems are unpolarized on average, but characterized by nonzero fluctuations. These fluctuations are inevitable due to the quantum-mechanical nature of spin. The physics of spin fluctuations in electron and nucelar systems is studied in this chapter. The intensity and dynamics of these inevitable stochastic fluctuations of spins contain information on spin relaxation and decoherence times, spin precession period, and interactions in spin systems. The theory of spin fluctuations in semiconductor nanosystems as well as experimental advances in the field of spin noise spectroscopy are reviewed. Specific situations where the spin noise spectroscopy can be particularly useful for spin dynamics studies are discussed, the analysis of recent progress in the field of nonequlibrium spin fluctuations is also presented.

scholarly journals Поляриметрия регулярных и стохастических сигналов в магнитооптике

2019 ◽  
Vol 61 (5) ◽  
pp. 946
Author(s):  
В.С. Запасский
Keyword(s):  
Optical Properties ◽  
Spin Systems ◽  
Spin Fluctuations ◽  
Spin Noise ◽  
Laser Polarimetry ◽  
Noise Spectroscopy

AbstractA brief review is presented of application of the high-sensitive laser polarimetry for detecting small changes—either regular, or stochastic—of the medium magnetization. Principles and results of application of the spectroscopy of spin fluctuations to atomic and semiconductor systems are described. New possibilities of studying the radiospectroscopic and optical properties of spin systems using the methods of noise spectroscopy are considered. Prospects for expanding the circle of objects of the spin noise spectroscopy at the expense of impurity dielectrics are discussed.

scholarly journals Spin Noise Spectroscopy Beyond Thermal Equilibrium and Linear Response

2014 ◽  
Vol 113 (15) ◽  
Author(s):  
P. Glasenapp ◽  
N. A. Sinitsyn ◽  
Luyi Yang ◽  
D. G. Rickel ◽  
D. Roy ◽  
...  
Keyword(s):  
Thermal Equilibrium ◽  
Linear Response ◽  
Spin Noise ◽  
Noise Spectroscopy

scholarly journals Ядерная спиновая динамика и флуктуации в анизотропной модели большого ящика

2022 ◽  
Vol 64 (2) ◽  
pp. 206
Author(s):  
А.В. Шумилин ◽  
Д.С. Смирнов
Keyword(s):  
Magnetic Field ◽  
Organic Semiconductors ◽  
Nuclear Spin ◽  
Spin Dynamics ◽  
Spin Model ◽  
Zero Magnetic Field ◽  
Current Fluctuations ◽  
Nuclear Spins ◽  
Spin Noise ◽  
Analytical Expressions

We consider the central spin model in the box approximation taking into account an external magnetic field and the anisotropy of the hyperfine interaction. From the exact Hamiltonian diagonalization we obtain analytical expressions for the nuclear spin dynamics in the limit of many nuclear spins. We predict the nuclear spin precession in zero magnetic field for the case of the anisotropic interaction between electron and nuclear spins. We calculate and describe the nuclear spin noise spectra in the thermodynamic equilibrium. The obtained results can be used for the analysis of the nuclear spin induced current fluctuations in organic semiconductors.

scholarly journals Cross-correlation spin noise spectroscopy of heterogeneous interacting spin systems

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Dibyendu Roy ◽  
Luyi Yang ◽  
Scott A. Crooker ◽  
Nikolai A. Sinitsyn
Keyword(s):  
Cross Correlation ◽  
Spin Systems ◽  
Spin Noise ◽  
Noise Spectroscopy ◽  
Interacting Spin Systems

scholarly journals EFFECT OF NUCLEAR SPINS ON THE ELECTRON SPIN DYNAMICS IN NEGATIVELY CHARGED InP QUANTUM DOTS

2007 ◽  
Vol 06 (03n04) ◽  
pp. 275-278
Author(s):  
I. V. IGNATIEV ◽  
I. YA. GERLOVIN ◽  
S. YU. VERBIN ◽  
W. MARUYAMA ◽  
B. PAL ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Spin ◽  
Spin Dynamics ◽  
Spin Fluctuations ◽  
Nuclear Spins ◽  
Spin Orientation ◽  
Dynamical Nuclear Polarization ◽  
Electron Spin Dynamics ◽  
Kinetics Of ◽  
Inp Quantum Dots

Kinetics of polarized photoluminescence of the negatively charged InP quantum dots in weak magnetic field is studied experimentally. Effect of both the nuclear spin fluctuations and the dynamical nuclear polarization on the electron spin orientation is observed.

Measurements of nuclear spin dynamics by spin-noise spectroscopy

2015 ◽  
Vol 106 (24) ◽  
pp. 242405 ◽  
Author(s):  
I. I. Ryzhov ◽  
S. V. Poltavtsev ◽  
K. V. Kavokin ◽  
M. M. Glazov ◽  
G. G. Kozlov ◽  
...  
Keyword(s):  
Nuclear Spin ◽  
Spin Dynamics ◽  
Spin Noise ◽  
Noise Spectroscopy

Strong Coupling of Electron and Nuclear Spins: Outlook and Prospects

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Energy Spectrum ◽  
Charge Carrier ◽  
Strong Coupling ◽  
Nuclear Spin ◽  
Spin Dynamics ◽  
Spin Polaron ◽  
Nuclear Spins ◽  
Deep Impurity ◽  
Impurity Centers ◽  
Ordered State

In this chapter, some prospects in the field of electron and nuclear spin dynamics are outlined. Particular emphasis is put ona situation where the hyperfine interaction is so strong that it leads to a qualitative rearrangement of the energy spectrum resulting in the coherent excitation transfer between the electron and nucleus. The strong coupling between the spin of the charge carrier and of the nucleus is realized, for example 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 ordered state, formation at low enough temperatures of nuclear spins, where the orientation of the carrier spin results in alignment of the spins of nucleus interacting with the electron or hole.

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