150 citations · 500 across the 12 of their papers we have counts for
13 papers
Monolayer van der Waals kagome lattice for high-temperature flat-band physics
Hyungkun Bong, Choongjae Won, Seongyong Lee +26
Kagome lattice materials host a remarkably rich landscape of novel quantum phenomena, all arising from the intrinsic interplay of topology, correlation, and frustration. While prev…
Sizable suppression of magnon Hall effect by magnon damping in CrGeTe
Ysun Choi, Heejun Yang, Jaena Park +1
Two-dimensional (2D) Heisenberg honeycomb ferromagnets are expected to have interesting topological magnon effects as their magnon dispersion can have Dirac points. The Dirac point…
Significant thermal Hall effect in the 3 cobalt Kitaev system
Heejun Yang, Chaebin Kim, Ysun Choi +9
Kitaev physics has recently attracted attention in condensed matter for its anticipated novel quantum spin liquid state. The thermal transport measurement is crucial for probing th…
Terahertz spin-to-charge current conversion in stacks of ferromagnets and the transition-metal dichalcogenide NbSe
Lukáš Nádvorník, Oliver Gueckstock, Lukas Braun +16
Transition-metal dichalcogenides (TMDCs) are an aspiring class of materials with unique electronic and optical properties and potential applications in spin-based electronics. Here…
Diagonal and off-diagonal thermal conduction with resonant phonon scattering in
Heejun Yang, Xianghan Xu, Jun Han Lee +3
The coupling between phonon and magnon is ubiquitous in magnetic materials and plays a crucial role in many aspects of magnetic properties, most notably in spintronics. Yet, this a…
Reshaped Weyl fermionic dispersions driven by Coulomb interactions in MoTe2
Seoung-Hun Kang, Sangjun Jeon, Hyun-Jung Kim +7
We report the direct evidence of impacts of the Coulomb interaction in a prototypical Weyl semimetal, MoTe2, that alter its bare bands in a wide range of energy and momentum. Our q…
Sizeable suppression of thermal Hall effect upon isotopic substitution in strontium titanate
Sangwoo Sim, Heejun Yang, Ha-Leem Kim +4
We report measurements of the thermal Hall effect in single crystals of both pristine and isotopically substituted strontium titanate. We discovered a two orders of magnitude diffe…
Symmetry dictated grain boundary state in a two-dimensional topological insulator
Hyo Won Kim, Seoung-Hun Kang, Hyun-Jung Kim +10
Structural imperfections such as grain boundaries (GBs) and dislocations are ubiquitous in solids and have been of central importance in understanding nature of polycrystals. In ad…
Spin to charge conversion in MoS monolayer with spin pumping
Cheng Cheng, Martin Collet, Juan-Carlos Rojas Sánchez +9
Layered transition-metal dichalcogenides (TMDs) family are gaining increasing importance due to their unique electronic band structures, promising interplay among light, valley (ps…
Graphene-Passivated Nickel as an Oxidation-Resistant Electrode for Spintronics
Bruno Dlubak, Marie-Blandine Martin, Robert S. Weatherup +9
We report on graphene-passivated ferromagnetic electrodes (GPFE) for spin devices. GPFE are shown to act as spin-polarized oxidation-resistant electrodes. The direct coating of nic…
Band gap opening by two-dimensional manifestation of Peierls instability in graphene
Sung-Hoon Lee, Hyun-Jong Chung, Jinseong Heo +4
Using first-principles calculations of graphene having high-symmetry distortion or defects, we investigate band gap opening by chiral symmetry breaking, or intervalley mixing, in g…
Pseudospin rotation and valley mixing in electron scattering at graphene edges
Changwon Park, Heejun Yang, Andrew J. Mayne +5
In graphene, the pseudospin and the valley flavor arise as new types of quantum degrees of freedom due to the honeycomb lattice comprising two sublattices (A and B) and two inequiv…
Non-monotonic temperature dependent transport in graphene grown by Chemical Vapor Deposition
J. Heo, H. J. Chung, Sung-Hoon Lee +7
Temperature-dependent resistivity of graphene grown by chemical vapor deposition (CVD) is investigated. We observe in low mobility CVD graphene device a strong insulating behavior…