Temperature scaling of the integrated dynamical susceptibility in YBa2Cu3O6.5(T c =50 K)期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Temperature scaling of the integrated dynamical susceptibility in YBa2Cu3O6.5(T c =50 K)

Authors:	R J Birgeneau R W Erwin P M Gehring M A Kastner B Keimer M Sato S Shamoto G Shirane J Tranquada

Institution:	(1) Department of Physics, Massachusetts Institute of Technology, 02139 Cambridge, MA, USA;(2) National Institute of Standards and Technology, 20899 Gaithersburg, MD, USA;(3) Department of Physics, Brookhaven National Laboratory, 11973 Upton, NY, USA;(4) Nagoya University, 464-01 Nagoya, Japan

Abstract:	The magnetic neutron scattering cross section in a crystal YBa₂Cu₃O_6.5(T _c=50 K) has been measured for energies between 4.5 meV and 15 meV and temperatures between 10 K and 275 K. From these data we extract the generalized susceptibility integrated around the (, ) position $I(\omega ,T) = \int\limits_{(\pi ,\pi )} {dq\operatorname{Im} \chi (q,\omega )_T .}$ These data are combined with those at 8.3 and 33.1 meV from a previous study. It is found thatI(, T) exhibits the simple temperature scaling form found previously in La_2–xSr_xCuO₄. Specifically, in YBa₂Cu₃O_6.5,I(, T)=I(, 0)2/tan^–1 (/0.9T). Implications of this behavior for the d.c. and infrared conductivity are discussed.

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