Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-10-26
R. de Sousa, Top. Appl. Phys. 115, 183 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Book chapter in "Electron spin resonance and related phenomena in low dimensional structures", edited by Marco Fanciulli. To b
Scientific paper
10.1007/978-3-540-79365-6_10
This chapter describes the relationship between low frequency noise and coherence decay of localized spins in semiconductors. Section 2 establishes a direct relationship between an arbitrary noise spectral function and spin coherence as measured by a number of pulse spin resonance sequences. Section 3 describes the electron-nuclear spin Hamiltonian, including isotropic and anisotropic hyperfine interactions, inter-nuclear dipolar interactions, and the effective Hamiltonian for nuclear-nuclear coupling mediated by the electron spin hyperfine interaction. Section 4 describes a microscopic calculation of the nuclear spin noise spectrum arising due to nuclear spin dipolar flip-flops with quasiparticle broadening included. Section 5 compares our explicit numerical results to electron spin echo decay experiments for phosphorus doped silicon in natural and nuclear spin enriched samples.
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