Abstract
There is strong experimental evidence for substantial antiferromagnetic coupling between the CuO 2 planes of the bilayers in YBCO compounds. The acoustic mode of the spin excitation spectrum has been measured but the optic mode has not been observed. Theoretical estimates suggest values for the antiferromagnetic interplane coupling as large as 10 meV. It has been proposed that this coupling is responsible for the spin gap in the underdoped YBCO compounds. In the recently synthesized compounds Y 2Ba 4Cu 7O 15 with alternating single/double chain blocks, it is possible to distinguish between the CuO 2 planes in a bilayer. We propose a nuclear magnetic cross relaxation experiment to directly measure the strength of the coupling between the two planes of a bilayer. The temperature dependence and magnitude of this cross relaxation is predicted.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
