Spin polarization transfer by the radical pair mechanism

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In a three-site representation, we study a spin polarization transfer from radical pair spins to a nearby electron or nuclear spin. The quantum dynamics of the radical pair spins is governed by a constant exchange interaction between the radical pair spins which have different Zeeman frequencies. Radical pair spins can recombine to the singlet ground state or to lower energy triplet states. It is then shown that the coherent dynamics of the radical pair induces spin polarization on the nearby third spin in the presence of a magnetic field. The spin polarization transfer depends on the difference between Zeeman frequencies, the singlet and triplet recombination rates, and on the exchange and dipole-dipole interactions between the different spins. In particular, the sign of the polarization depends on the exchange coupling between radical pair spins and also on the difference between singlet and triplet recombination rate constants.

Original languageEnglish
Article number054101
JournalJournal of Chemical Physics
Volume143
Issue number5
DOIs
Publication statusPublished - Aug 7 2015

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Spin polarization
polarization
Exchange coupling
Exchange interactions
Electron energy levels
Ground state
Rate constants
Polarization
Magnetic fields
Electrons
dipoles
nuclear spin
electron spin
atomic energy levels
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Spin polarization transfer by the radical pair mechanism. / Zarea, Mehdi; Ratner, Mark A; Wasielewski, Michael R.

In: Journal of Chemical Physics, Vol. 143, No. 5, 054101, 07.08.2015.

Research output: Contribution to journalArticle

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