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Electrical detection of spin resonance with time resolution in a two-dimensional electron system

G. A. Nikolaev1,2, O. V. Orlov1,2, S. A. Andreeva3,1, Ya. V. Fedotova1, A. R. Khisameeva1, A. V. Shchepetilnikov1,3, D. V. Yurasov4, A. V. Novikov4, and I. V. Kukushkin1

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Phys. Rev. Applied 26, 014099 – Published 29 July, 2026

DOI: https://doi.org/10.1103/ffbk-qb9r

Abstract

We report the electrical detection of the spin resonance with temporal resolution in a two-dimensional electron system. Spin resonance was excited by pulses of subterahertz radiation characterized by relatively short rise and fall times on the order of 10 ns and was observed as a resonant peak in the high-frequency conductivity of the two-dimensional channel. The suggested approach is inherently broadband and enables the investigation of spin dynamics in two-dimensional electron systems across a wide range of magnetic fields and temperatures. The proposed technique was employed to measure spin relaxation in a Si/SiGe quantum well.

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Phys. Rev. Applied 26, 014099– Published 29 July, 2026
  • Received 29 April 2026
  • Revised 24 June 2026
  • Accepted 13 July 2026
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