Title: The Ground State of Geometrically Frustrated Magnets

 

Arthur Ramirez

 

Physics Department, University of California, Santa Cruz

 

Join Zoom Meeting:
https://cwru.zoom.us/j/99054239108?pwd=soEzyUCYd80fojLzSuBmPA3Ow9lquc.1

 

 

Abstract: Geometrically frustrated magnets undergo long-range ordering at temperatures far below the mean-field estimate. Such a suppression of ordering has made these materials candidates for the so-called quantum spin liquid, a theoretically predicted fully quantum-coherent state that can admit anyon excitations with their attendant quantum computing potential. I will argue that the ground state emerging in all geometrically frustrated situations is, however, one of short-range order that is likely inimical to quantum-coherence. For 3D systems this state is well-described by the Coulomb representation, implying long-range interactions between defects. The emergent spin glass freezing in this “eminuscent” state is novel in being driven by the medium, instead of a competition between thermal energy and incumbent microscopic interactions. I will discuss ways to study the eminuscent state and its 2D relatives.

 

Host: Xuan Gao