4 papers
Defect-Controlled Multiferroicity via Stacking Control in Nonmagnetic van der Waals Bilayers
Bumseop Kim, Sayed Ali Akbar Ghorashi, Andrew M. Rappe
We present a general paradigm that directly couples vacancy-localized magnetism to interfacial sliding ferroelectricity in nonmagnetic van der Waals (vdWs) bilayers. Utilizing bila…
Optical Signature of Moiré Superlattices Formed by Twisted SrTiO Membranes
T. A. M. Ragib Shahriar, Fumikazu Murakami, Xing He +11
Moiré superlattices formed at the interfaces of mismatched lattices have attracted significant interest over the past decade due to their large tunability of band parameters and i…
Field-unmasked quantum geometry in a symmetry-forbidden photocurrent
Bumseop Kim, Aaron M. Burger, Zhenbang Dai +6
Frequency- and polarization-resolved photocurrents provide a sensitive probe of hidden symmetry and band geometry in quantum materials. Here we study a chiral cubic sillenite whose…
Relativistic Spin-Lattice Interaction Compatible with Discrete Translation Symmetry in Solids
Bumseop Kim, Noejung Park, Kyoung-Whan Kim
Recent interest in orbital angular momentum has led to a rapid expansion of research on spin-orbit coupling effects in solids, while also highlighting significant technical challen…