114 citations · 262 across the 7 of their papers we have counts for
7 papers
Polarization at the Nanoscale
Ke Yang, Zeyu Jiang, Duk-Hyun Choe +2
Modern polarization theory yields surface bound charge associated with spontaneous polarization of bulk. However, understanding polarization in nano systems also requires a proper…
Uncovering vacuum level in infinite solid by real-space potential-unfolding
Duk-Hyun Choe, Damien West, Shengbai Zhang
Although real materials are finite in size, electronic structure theory is built on the assumption of infinitely large solid, which led to a longstanding controversy: where is the…
Quantum oscillation in carrier transport in two-dimensional junctions
Junfeng Zhang, Weiyu Xie, Michael L. Agiorgousis +5
Two-dimensional (2D) device structures have recently attracted considerable attention. Here, we show that most 2D device structures, regardless vertical or lateral, act as a latera…
Highly Efficient Carrier Multiplication in van der Waals layered Materials
Ji-Hee Kim, Matthew R. Bergren, Jin Cheol Park +8
Carrier multiplication (CM), a photo-physical process to generate multiple electron-hole pairs by exploiting excess energy of free carriers, is explored for efficient photovoltaic…
Built-in potential and band alignment of matter
Duk-Hyun Choe, Damien West, Shengbai Zhang
The built-in potential is the interfacial potential difference due to electric dipole at the interface of two dissimilar materials. It is of central importance to the understanding…
Universal stability of two-dimensional traditional semiconductors
Michael C. Lucking, Weiyu Xie, Duk-Hyun Choe +3
Interest in two dimensional materials has exploded in recent years. Not only are they studied due to their novel electronic properties, such as the emergent Dirac Fermion in graphe…
Understanding topological phase transition in transition metal dichalcogenides
Duk-Hyun Choe, Ha-Jun Sung, Kee Joo Chang
Despite considerable interest in layered transition metal dichalcogenides (TMDs), such as MX2 with M = (Mo, W) and X = (S, Se, Te), the physical origin of their topological nature…