TY - JOUR

T1 - Study of properties of the nuclear spin system in bulk n-GaAs by warm-up spectroscopy

AU - Литвяк, Валентина Михайловна

AU - Чербунин, Роман Викторович

AU - Солдатенков, Федор

AU - Калевич, Владимир Константинович

AU - Кавокин, Кирилл Витальевич

N1 - Conference code: 24

PY - 2023/4/30

Y1 - 2023/4/30

N2 - In this paper, we present an overview of the possibilities of nuclear spin warm-up spectroscopy method. Nuclear spin warm-up spectroscopy method is based on optical cooling and subsequent warming up of nuclear spins by oscillating magnetic field. Changes of nuclear spin temperature before and after applying of oscillating magnetic field are determined from the degree of photoluminescence polarization. This method is applied to studying the properties of the cooled nuclear spin system in bulk n-GaAs crystals. Using warm-up spectroscopy, we can investigate such thermodynamical characteristics of cooled nuclear spins as local fields, absorption coefficients and fluctuations spectral density (correlator spectrum). In particular, such experimental opportunities accompanied by theoretical interpretations allows us to investigate and control the presence of quadrupole interactions in structures. Furthermore, the nuclear spin fluctuations are reflected in the correlator spectrum, which can be recalculated from absorption coefficients. Measurements of the nuclear spin correlator are important experimental opportunity because fluctuations of nuclear spins are one of the main sources of electron spin decoherence in n-GaAs.

AB - In this paper, we present an overview of the possibilities of nuclear spin warm-up spectroscopy method. Nuclear spin warm-up spectroscopy method is based on optical cooling and subsequent warming up of nuclear spins by oscillating magnetic field. Changes of nuclear spin temperature before and after applying of oscillating magnetic field are determined from the degree of photoluminescence polarization. This method is applied to studying the properties of the cooled nuclear spin system in bulk n-GaAs crystals. Using warm-up spectroscopy, we can investigate such thermodynamical characteristics of cooled nuclear spins as local fields, absorption coefficients and fluctuations spectral density (correlator spectrum). In particular, such experimental opportunities accompanied by theoretical interpretations allows us to investigate and control the presence of quadrupole interactions in structures. Furthermore, the nuclear spin fluctuations are reflected in the correlator spectrum, which can be recalculated from absorption coefficients. Measurements of the nuclear spin correlator are important experimental opportunity because fluctuations of nuclear spins are one of the main sources of electron spin decoherence in n-GaAs.

KW - absorption spectrum

KW - local field

KW - nuclear spin correlator

KW - nuclear spin system

KW - optical cooling

UR - https://www.mendeley.com/catalogue/e9c70bb2-930e-3c45-9537-b2cb8d5faef9/

U2 - 10.18721/JPM.161.303

DO - 10.18721/JPM.161.303

M3 - Conference article

VL - 16

SP - 20

EP - 25

JO - НАУЧНО-ТЕХНИЧЕСКИЕ ВЕДОМОСТИ САНКТ-ПЕТЕРБУРГСКОГО ГОСУДАРСТВЕННОГО ПОЛИТЕХНИЧЕСКОГО УНИВЕРСИТЕТА. ФИЗИКО-МАТЕМАТИЧЕСКИЕ НАУКИ

JF - НАУЧНО-ТЕХНИЧЕСКИЕ ВЕДОМОСТИ САНКТ-ПЕТЕРБУРГСКОГО ГОСУДАРСТВЕННОГО ПОЛИТЕХНИЧЕСКОГО УНИВЕРСИТЕТА. ФИЗИКО-МАТЕМАТИЧЕСКИЕ НАУКИ

SN - 2304-9782

IS - 1.3

T2 - 24th Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics

Y2 - 28 November 2022 through 2 December 2022

ER -