Long-lived heteronuclear spin-singlet states in liquids at a zero magnetic field.


Journal Article

We report an observation of long-lived spin-singlet states in a 13C-1H spin pair in a zero magnetic field. In 13C-labeled formic acid, we observe spin-singlet lifetimes as long as 37 s, about a factor of 3 longer than the T1 lifetime of dipole polarization in the triplet state. In contrast to common high-field experiments, the observed coherence is a singlet-triplet coherence with a lifetime T2 longer than the T1 lifetime of dipole polarization in the triplet manifold. Moreover, we demonstrate that heteronuclear singlet states formed between a 1H and a 13C nucleus can exhibit longer lifetimes than the respective triplet states even in the presence of additional spins that couple to the spin pair of interest. Although long-lived homonuclear spin-singlet states have been extensively studied, this is the first experimental observation of analogous singlet states in heteronuclear spin pairs.

Full Text

Cited Authors

  • Emondts, M; Ledbetter, MP; Pustelny, S; Theis, T; Patton, B; Blanchard, JW; Butler, MC; Budker, D; Pines, A

Published Date

  • February 18, 2014

Published In

Volume / Issue

  • 112 / 7

Start / End Page

  • 077601 -

PubMed ID

  • 24579636

Pubmed Central ID

  • 24579636

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.112.077601


  • eng