1.
Phys Rev Lett
; 87(3): 037202, 2001 Jul 16.
Article
in English
| MEDLINE
| ID: mdl-11461586
ABSTRACT
The magnetic excitation spectrum in the two-dimensional (2D) S = 1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate has been measured for temperatures up to T approximately J/2, where J = 6.31+/-0.02 meV is the 2D exchange coupling. For T<
