RB-87 SPIN-LATTICE RELAXATION IN THE ROTATING-FRAME AND THE PHASON GAP IN INCOMMENSURATE RB2ZNCL4

Authors
AILION DC CHEN S
Citation
Dc. Ailion et S. Chen, RB-87 SPIN-LATTICE RELAXATION IN THE ROTATING-FRAME AND THE PHASON GAP IN INCOMMENSURATE RB2ZNCL4, Solid state communications, 92(10), 1994, pp. 835-837
Citations number
12
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
92
Issue
10
Year of publication
1994
Pages
835 - 837
Database
ISI
SICI code
0038-1098(1994)92:10<835:RSRITR>2.0.ZU;2-#
Abstract
The temperature dependence of both the phason-induced Rb-87 1/2 --> - 1/2 rotating-frame spin-lattice relaxation time (T1rho) and the labora tory frame relaxation time (T1) was measured in the incommensurate pha se of Rb2ZnCl4. The observed ratio T1/T1rho congruent-to 1.6 is much s maller than that predicted for the case of a gapless phason (T1/T1rho = square-root OMEGA(L)/OMEGA1 congruent-to 86), thereby demonstrating the presence of a phason gap in this system. The phason gap was estima ted to be 50 GHz, in agreement with other measurements.