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Phonon-pair-driven Ferroelectricity Causes Costless Domain-walls and Bulk-boundary Duality
Hyun-Jae Lee, Kyoung-June Go, Pawan Kumar +10
Ferroelectric domain walls, recognized as distinct from the bulk in terms of symmetry, structure, and electronic properties, host exotic phenomena including conductive walls, ferro…
Phonon-derived ultrafast relaxation of spin-valley polarized states in MoS_{2}
Dongbin Shin, Hosub Jin, Noejung Park
The valley degree of freedom and the possibility of spin-valley coupling of solid materials have attracted growing interest, and the relaxation dynamics of spin- and valley-polariz…
Search and design of nonmagnetic centrosymmetric layered crystals with large local spin polarization
Qihang Liu, Xiuwen Zhang, Hosub Jin +4
Until recently, spin-polarization in nonmagnetic materials was the exclusive territory of non- centrosymmetric structures. It was recently shown that a form of hidden spin polariza…
Topological Quantum Phase Transition in 5 Transition Metal Oxide NaIrO
Choong H. Kim, Heung Sik Kim, Hogyun Jeong +2
We predict a quantum phase transition from normal to topological insulators in the 5 transition metal oxide NaIrO, where the transition can be driven by the change of th…
New Candidates for Topological Insulators : Pb-based chalcogenide series
Hosub Jin, Jung-Hwan Song, Arthur J. Freeman +1
Here, we theoretically predict that the series of Pb-based layered chalcogenides, PbBiSe and PbSbTe, are possible new candidates for topological ins…
Dirac cone engineering in BiSe thin films
Hosub Jin, Jung-Hwan Song, Arthur J. Freeman
Topological insulators are distinguished from normal insulators by their bulk insulating gap and odd number of surface states connecting the inverted conduction and valence bands a…