Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures

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Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures. / Владимирова, Мария; Cronenberger, S.; Scalbert, D.; Литвяк, Валентина Михайловна ; Кавокин, Кирилл Витальевич; Lemaître, Aristide.

In: Physical Review B, Vol. 105, No. 15, 155305, 15.04.2022.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{e6408b044e764a0289811b32f2205d26,

title = "Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures",

abstract = "Heat capacity of the nuclear-spin system (NSS) in GaAs-based microstructures has been shown to be much greater than expected from dipolar coupling between nuclei, thus limiting the efficiency of NSS cooling by adiabatic demagnetization. It was suggested that quadrupole interaction induced by some small residual strain could provide this additional reservoir for the heat storage. We check and validate this hypothesis by combining nuclear-spin relaxation measurements with adiabatic remagnetization and nuclear magnetic resonance experiments, using electron spin-noise spectroscopy as a unique tool for detection of nuclear magnetization. Our results confirm and quantify the role of the quadrupole splitting in the heat storage within NSS and provide additional insight into the fundamental, but still actively debated relation between a mechanical strain and the resulting electric field gradients in GaAs.",

author = "Мария Владимирова and S. Cronenberger and D. Scalbert and Литвяк, {Валентина Михайловна} and Кавокин, {Кирилл Витальевич} and Aristide Lema{\^i}tre",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = apr,

day = "15",

doi = "10.1103/PhysRevB.105.155305",

language = "English",

volume = "105",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "15",

}

RIS

TY - JOUR

T1 - Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures

AU - Владимирова, Мария

AU - Cronenberger, S.

AU - Scalbert, D.

AU - Литвяк, Валентина Михайловна

AU - Кавокин, Кирилл Витальевич

AU - Lemaître, Aristide

PY - 2022/4/15

Y1 - 2022/4/15

N2 - Heat capacity of the nuclear-spin system (NSS) in GaAs-based microstructures has been shown to be much greater than expected from dipolar coupling between nuclei, thus limiting the efficiency of NSS cooling by adiabatic demagnetization. It was suggested that quadrupole interaction induced by some small residual strain could provide this additional reservoir for the heat storage. We check and validate this hypothesis by combining nuclear-spin relaxation measurements with adiabatic remagnetization and nuclear magnetic resonance experiments, using electron spin-noise spectroscopy as a unique tool for detection of nuclear magnetization. Our results confirm and quantify the role of the quadrupole splitting in the heat storage within NSS and provide additional insight into the fundamental, but still actively debated relation between a mechanical strain and the resulting electric field gradients in GaAs.

AB - Heat capacity of the nuclear-spin system (NSS) in GaAs-based microstructures has been shown to be much greater than expected from dipolar coupling between nuclei, thus limiting the efficiency of NSS cooling by adiabatic demagnetization. It was suggested that quadrupole interaction induced by some small residual strain could provide this additional reservoir for the heat storage. We check and validate this hypothesis by combining nuclear-spin relaxation measurements with adiabatic remagnetization and nuclear magnetic resonance experiments, using electron spin-noise spectroscopy as a unique tool for detection of nuclear magnetization. Our results confirm and quantify the role of the quadrupole splitting in the heat storage within NSS and provide additional insight into the fundamental, but still actively debated relation between a mechanical strain and the resulting electric field gradients in GaAs.

UR - https://arxiv.org/abs/2112.02957

UR - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.155305#fulltext

UR - http://www.scopus.com/inward/record.url?scp=85129009386&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.105.155305

DO - 10.1103/PhysRevB.105.155305

M3 - Article

VL - 105

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 15

M1 - 155305

ER -

ID: 92207237