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8 papers · 2 filters
Topological Landscape of Competing Charge Density Waves in 2H-NbSe2
Gyeongcheol Gye, Eunseok Oh, Han Woong Yeom
Despite decades of studies on charge density wave (CDW) of 2H-NbSe2, the origin of its incommensurate CDW ground state has not been understood. We discover that CDW of 2H-NbSe2 is…
Grain Boundaries in Chemical Vapor Deposited Atomically Thin Hexagonal Boron Nitride
Xibiao Ren, Jichen Dong, Peng Yang +8
Large-area two-dimensional (2D) materials for technical applications can now be produced by chemical vapor deposition (CVD). Unfortunately, grain boundaries (GBs) are ubiquitously…
Two dimensional crystals in three dimensions: electronic decoupling of single-layered platelets in colloidal nanoparticles
Roman Kempt, Agnieszka Kuc, Jae Hyo Han +2
Two-dimensional crystals, single sheets of layered materials, often show distinct properties desired for optoelectronic applications, such as larger and direct band gaps, valley- a…
Strong interband interaction in the excitonic insulator phase of TaNiSe
Jinwon Lee, Chang-Jong Kang, Man Jin Eom +3
Excitonic insulator (EI) was proposed in 60's as a distinct insulating state originating from pure electronic interaction, but its material realization has been elusive with extrem…
Spin-orbit-stable type-II nodal line band crossing in n-doped monolayer MoX2 (X=S,Se,Te)
Kyung-Han Kim, Bohm Jung Yang, Hyun-Woo Lee
1H-phase monolayer transition-metal dichalcogenides have spin-split electronic band structures near the K(K') point due to strong spin-orbit coupling and intrinsic inversion symmet…
Unveiling hidden charge density waves in single-layer NbSe by impurities
Fabrizio Cossu, Ali G. Moghaddam, Kyoo Kim +4
We employ {\it{ab-initio}} calculations to investigate the charge density waves in single-layer NbSe, and we explore how they are affected by transition metal atoms. Our calcul…