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Electron quasi-itinerancy intertwined with quantum order by disorder in pyrochlore iridate magnetism
Gang Chen, Xiaoqun Wang
We point out the emergence of magnetism from the interplay of electron quasi-itinerancy and quantum order by disorder in pyrochlore iridates. Like other Mott insulating iridates, t…
Dilemma in strongly correlated materials: Hund's metal vs relativistic Mott insulator
Gang Chen
We point out the generic competition between the Hund's coupling and the spin-orbit coupling in correlated materials, and this competition leads to an electronic dilemma between th…
Writing and deleting skyrmions with electric fields in a multiferroic heterostructure
Chao-Kai Li, Xu-Ping Yao, Gang Chen
Magnetic skyrmions are topological spin textures that can be used as information carriers for the next-generation information storage and processing. The electric-field controlling…
Topological chiral spin liquids and competing states in triangular lattice SU() Mott insulators
Xu-Ping Yao, Yonghao Gao, Gang Chen
SU() Mott insulators have been proposed and/or realized in solid-state materials and with ultracold atoms on optical lattices. We study the two-dimensional SU() antiferromagn…
Some experimental schemes to identify quantum spin liquids
Yong Hao Gao, Gang Chen
Despite the apparent ubiquity and variety of quantum spin liquids in theory, experimental confirmation of spin liquids remains to be a huge challenge. Motivated by the recent surge…
Clusterization transition between cluster Mott insulators on a breathing Kagomé lattice
Xu-Ping Yao, Xiao-Tian Zhang, Yong Baek Kim +2
Motivated by recent experimental progress on various cluster Mott insulators, we study an extended Hubbard model on a breathing Kagomé lattice with a single electron orbital and $1…