Spin dynamics of a quasi-one-dimensional electron in the quantum limit

2024/11/25 by M. H. Fauzi, Fauzi, M. H., M. Takahashi +7
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Quantum optics and atomic interactions

paper · pdf · doi:10.48550/arxiv.2411.16060

openalex publication_date 2024/11/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study electron spin dynamics whose movement is restricted to the lowest one dimensional subband channel (G ≤ 2e²/h ), through nuclear spin relaxation rate measurement (1/T₁). We observe an unusual double-peak structure in the 1/T₁ profile below the lowest subband level, where the up and down spin edge channel is still largely overlap. This profile significantly deviates from the behavior predicted by a non-interacting electron model, in which the only source of relaxation is through thermal fluctuations near the Fermi level. Our experimental results, supported by theoretical calculations, suggest that enhanced electron-electron interactions at the center of a quantum point contact are the likely origin of the observed double-peak structures.

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