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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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Due to the geometrically frustrated lattice and effective spin-1/2, the XY pyrochlores Er2Ti2O7 and Yb2Ti2O7 exhibit exotic magnetic ground states related to quantum spin fluctuations. In this talk, we presented our recent studies on the magnetic orderings of new XY pyrochlores Er2Ge2O7 and Yb2Ge2O7. Then we tried to unify the magnetic orderings of all studied XY pyrochlores Er2B2O7 and Yb2B2O7 (B = Sn, Ti, and Ge) through the chemical pressure effects based on the theoretically proposed phase diagram.
