Beta-Detected NQR in Zero Field with a Low Energy Beam of   \nuc{8}{Li}$^+$

Z. Salman; R.F. Kiefl; K.H. Chow; W.A. MacFarlane; D.J. Arseneau; S.; Daviel; C.D.P. Levy; Y. Maeno; R. Poutissou

arXiv:cond-mat/0511356·cond-mat.str-el·May 23, 2007

Beta-Detected NQR in Zero Field with a Low Energy Beam of \nuc{8}{Li}$^+$

Z. Salman, R.F. Kiefl, K.H. Chow, W.A. MacFarlane, D.J. Arseneau, S., Daviel, C.D.P. Levy, Y. Maeno, R. Poutissou

PDF

TL;DR

This paper demonstrates zero-field beta-detected nuclear quadrupole resonance using a low-energy polarized uc{8}{Li}$^+$ beam, revealing site-specific quadrupolar interactions in several crystalline materials.

Contribution

It introduces a novel zero-field NQR technique with a radioactive ion beam, providing detailed site information in complex crystals.

Findings

01

Detected multiple quadrupolar sites in crystals

02

Observed large resonance amplitudes and widths

03

Indicated significant mixing of quadrupolar levels

Abstract

Beta-detected nuclear quadrupole resonances (\bnqr) at zero field are observed using a beam of low energy highly polarized radioactive \nuc{8}{Li} $^{+}$ . The resonances were detected in SrTiO $_{3}$ , Al $_{2}$ O $_{3}$ and Sr $_{2}$ RuO $_{4}$ single crystals by monitoring the beta-decay anisotropy as a function of a small audio frequency magnetic field. The resonances show clearly that \nuc{8}{Li} occupies one site with non-cubic symmetry in SrTiO $_{3}, tw o in A l$ _2 $O$ _3 $an d t h r ees i t es in S r$ _2 $R u O$ _4 $. T h er eso nan ce am pl i t u d e an d w i d t ha r es u r p r i s in g l y l a r g eco m p a r e d t o t h e v a l u ese x p ec t e df r o m t r an s i t i o n s b e tw ee n t h e$ |\pm 2> \leftrightarrow |\pm 1> $s p in s t a t es, in d i c a t in g a s i g ni f i c an t mi x in g b e tw ee n t h e$ |\pm m>$ quadrupolar split levels.

Peer Reviews

No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.

Videos

No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.