Direct observation of the quantum energy gap in ${S=\frac{1}{2}}$ tetragonal cuprate antiferromagnets

Author: Katsumata K.   Hagiwara M.   Honda Z.   Satooka J.   Aharony A.   Birgeneau R. J.   Chou F. C.   Entin-Wohlman O.   Harris A. B.   Kastner M. A.   Kim Y. J.   Lee Y. S.  

Publisher: Edp Sciences

E-ISSN: 1286-4854|54|4|508-514

ISSN: 0295-5075

Source: EPL (EUROPHYSICS LETTERS), Vol.54, Iss.4, 2010-03, pp. : 508-514

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Abstract