A new mechanism for electron spin echo envelope modulation

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

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Electron spin echo envelope modulation (ESEEM) has been observed for the first time from a coupled heterospin 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 nuclear magnetic resonance or a pair of resonant electron spins in electron paramagnetic resonance. We observe low-frequency ESEEM (26 and 52 kHz) due to a new mechanism present for any electron spin with S>12 that is hyperfine coupled to a nuclear spin. In our case these are electron spin (S=32) 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 N14 nucleus.

Original languageEnglish (US)
Article number174504
JournalJournal of Chemical Physics
Issue number17
StatePublished - May 2005

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


Dive into the research topics of 'A new mechanism for electron spin echo envelope modulation'. Together they form a unique fingerprint.

Cite this