CE30 - Physique de la matière condensée et de la matière diluée

COrrelated NUclear Spin states in n-GaAs and nanostructures – CONUS

Submission summary

Cold nuclear spin systems (NSS) exhibit a rich phase diagram spanning over positive and negative temperatures and including various magnetic phases. In semiconductors, NSS offers a possibility to address the thermodynamics on magnetic dipolar lattices below 1µK. However, cooling to such low temperatures is challenging, sensitive detection methods are missing and even the theoretical problem of the magnetic phase diagram is just partly solved. Our Russian-French consortium has developed models and optical techniques for non-perturbative control of NSS in semiconductors. We aim to extend them via low-field nuclear magnetic resonance to probe sensitivity of each isotope to strains and electric field gradients. Our objective is to find and mitigate the mechanisms limiting nuclear spin cooling in GaAs-based micro- and nanostructures. This will pave the way towards control of nuclear spin correlations and, ultimately, realization of semiconductor-specific magnetically ordered states.

Project coordination

Denis Scalbert (Laboratoire Charles Coulomb)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

L2C Laboratoire Charles Coulomb
SOLAB Université de Saint-Petersbourg / SOLAB
C2N Centre de Nanosciences et de Nanotechnologies

Help of the ANR 554,164 euros
Beginning and duration of the scientific project: March 2022 - 36 Months

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