0412002v1

related topics
{spin, pulse, spins}
{level, atom, field}
{cos, sin, state}
{time, wave, function}
{bell, inequality, local}
{operator, operators, space}
{light, field, probe}
{measurement, state, measurements}
{cavity, atom, atoms}

A new mechanism for electron spin echo envelope modulation

John J. L. Morton, Alexei M. Tyryshkin, Arzhang Ardavan, Kyriakos Porfyrakis, Stephen A. Lyon, G. Andrew D. Briggs

abstract: Electron spin echo envelope modulation (ESEEM) has been observed for the first time from a coupled hetero-spin pair of electron and nucleus in liquid solution. Previously, modulation effects in spin echo experiments have only been described in liquid solutions for a coupled pair of homonuclear spins in NMR or a pair of resonant electron spins in EPR. We observe low-frequency ESEEM (26 and 52 kHz) due to a new mechanism present for any electron spin with S>1/2 that is hyperfine coupled to a nuclear spin. In our case these are electron spin (S=3/2) and nuclear spin (I=1) in the endohedral fullerene N@C60. The modulation is shown to arise from second order effects in the isotropic hyperfine coupling of an electron and 14N nucleus.

oai_identifier:
oai:arXiv.org:quant-ph/0412002
categories:
quant-ph
comments:
15 pages, 4 figures
doi:
10.1063/1.1888585
arxiv_id:
quant-ph/0412002
journal_ref:
J. Chem. Phys. 122, 174504 (2005)
created:
2004-12-01

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