169 citations · 647 across the 27 of their papers we have counts for
20 papers · 1 filter
Plasmonic polaron in self-intercalated 1T-TiS2
Byoung Ki Choi, Woojin Choi, Zhiyu Tao +24
Electron-boson coupling is central to a comprehensive understanding of the diverse physical phenomena emerging from many-body interactions. Yet less attention has been paid to how…
Giant Hole-doping in 2H-WSe2 via Ta Substitution
Minhee Kang, Woojin Choi, Choongyu Hwang +1
The family of transition metal dichalcogenides (TMDCs) has been regarded as promising candidates for future electronics, valleytronics, spintronics, and optoelectronics. While most…
Unusual ferromagnetic band evolution and high Curie temperature in monolayer 1T-CrTe2 on bilayer graphene
Kyoungree Park, Ji-Eun Lee, Dongwook Kim +17
2D van der Waals ferromagnets hold immense promise for spintronic applications due to their controllability and versatility. Despite their significance, the realization and in-dept…
Quasidegenerate charge-density wave states in 1T-TiSe
Seungrok Mun, Woojin Choi, Hayoon Im +4
Transition metal dichalcogenides have been actively studied for their intriguing charge density wave (CDW) formations and their impacts on material properties. Among these, 1T-TiSe…
Spin-orbit-splitting-driven nonlinear Hall effect in NbIrTe4
Ji-Eun Lee, Aifeng Wang, Shuzhang Chen +13
The Berry curvature dipole (BCD) serves as a one of the fundamental contributors to emergence of the nonlinear Hall effect (NLHE). Despite intense interest due to its potential for…
Modified Dirac fermions in the crystalline xenon and graphene Moiré heterostructure
Hayoon Im, Suji Im, Kyoo Kim +4
The interface between two-dimensional (2D) crystals often forms a Moire superstructure that imposes a new periodicity, which is a key element in realizing complex electronic phases…
Controlling structure and interfacial interaction of monolayer TaSe2 on bilayer graphene
Hyobeom Lee, Hayoon Im, Byoung Ki Choi +11
Tunability of interfacial effects between two-dimensional (2D) crystals is crucial not only for understanding the intrinsic properties of each system, but also for designing electr…
Electronic structure of above-room-temperature van der Waals ferromagnet FeGaTe
Ji-Eun Lee, Shaohua Yan, Sehoon Oh +7
FeGaTe, a recently discovered van der Waals ferromagnet, demonstrates intrinsic ferromagnetism above room temperature, necessitating a comprehensive investigation of the mi…
From Stoner to Local Moment Magnetism in Atomically Thin Cr2Te3
Yong Zhong, Cheng Peng, Haili Huang +12
The field of two-dimensional (2D) ferromagnetism has been proliferating over the past few years, with ongoing interests in basic science and potential applications in spintronic te…
Imaging the breakdown and restoration of topological protection in magnetic topological insulator MnBiTe
Qile Li, Iolanda Di Bernardo, Johnathon Maniatis +9
Quantum anomalous Hall (QAH) insulators transport charge without resistance along topologically protected chiral one-dimensional edge states. Yet, in magnetic topological insulator…
A novel superstructure in epitaxially grown 1T-TaTe
Jinwoong Hwang, Yeongrok Jin, Canxun Zhang +13
The spontaneous formation of electronic orders is a crucial element for understanding complex quantum states and engineering heterostructures in two-dimensional materials. We repor…
Large-gap insulating dimer ground state in monolayer IrTe2
Jinwoong Hwang, Kyoo Kim, Canxun Zhang +11
Monolayers of two-dimensional van der Waals materials exhibit novel electronic phases distinct from their bulk due to the symmetry breaking and reduced screening in the absence of…
Evidences for the exciton gas phase and its condensation in monolayer 1T-ZrTe2
Yekai Song, Chunjing Jia, Hongyu Xiong +15
The excitonic insulator (EI) is a Bose-Einstein condensation (BEC) of excitons bound by electron-hole interaction in a solid, which could support high-temperature BEC transition. T…
Crossover from 2D ferromagnetic insulator to wide bandgap quantum anomalous Hall insulator in ultra-thin MnBi2Te4
Chi Xuan Trang, Qile Li, Yuefeng Yin +9
Intrinsic magnetic topological insulators offer low disorder and large magnetic bandgaps for robust magnetic topological phases operating at higher temperatures. By controlling the…
A plausible method of preparing the ideal p-n junction interface of a thermoelectric material by surface doping
Ji-Eun Lee, Jinwoong Hwang, Minhee Kang +10
Recent advances in two-dimensional (2D) crystals make it possible to realize an ideal interface structure that is required for device applications. Specifically, a p-n junction mad…
Concomitant enhancement of electron-phonon coupling and electron-electron interaction in graphene decorated with ytterbium
Minhee Kang, Jinwoong Hwang, Ji-Eun Lee +2
The interplay between electron-electron interaction and electron-phonon coupling has been one of the key issues in graphene as it can provide information on the origin of enhanced…
Gapped Nearly Free-Standing Graphene on an SiC(0001) Substrate Induced by Manganese Atoms
Jinwoong Hwang, Ji-Eun Lee, Minhee Kang +4
The electron band structure of manganese-adsorbed graphene on an SiC(0001) substrate has been studied using angle-resolved photoemission spectroscopy. Upon introducing manganese at…
Temperature-Dependent Electron-Electron Interaction in Graphene on SrTiO3
Hyejin Ryu, Jinwoong Hwang, Debin Wang +6
The electron band structure of graphene on SrTiO3 substrate has been investigated as a function of temperature. The high-resolution angle-resolved photoemission study reveals that…
Hole doping, hybridization gap, and electronic correlation in graphene on a platinum substrate
Jinwoong Hwang, Hwihyeon Hwang, Min-Jeong Kim +7
The interaction between graphene and substrates provides a viable routes to enhance functionality of both materials. Depending on the nature of electronic interaction at the interf…
Study on the high spectral intensity at the Dirac energy of single-layer graphene on an SiC substrate
Jinwoong Hwang, Choongyu Hwang
We have investigated electron band structure of epitaxially grown graphene on an SiC(0001) substrate using angle-resolved photoemission spectroscopy. In single-layer graphene, abno…