• 세라미스트
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• 제22권4호
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• pp.350-356
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• 2019

Recently, transition metal dichalcogenide (TMDC) monolayers have been the subject of research exploring the physical phenomenon generated by low dimensionality and high symmetry. One of the keys to understanding new physical observations is the electronic band structure of 2D TMDCs. Angle-resolved photoelectron spectroscopy (ARPES) is, to this point, the best technique for obtaining information on the electronic structure of 2D TMDCs. However, through ARPES research, obtaining the long-range well-ordered single crystal samples always proves a challenging and obstacle presenting issue, which has been limiting towards measuring the electronic band structures of samples. This is particularly true in general 2D TMDCs cases. Here, we introduce the approach, with a mathematical framework, to overcome such ARPES limitations by employing the high level of symmetry of 2D TMDCs. Their high symmetry enables measurement of the clear and sharp electronic band dispersion, which is dominated by the band dispersion of single-crystal TMDCs along the two high symmetry directions Γ-K and Γ-M. In addition, we present two important studies and observations for the direct measuring of the exciton binding energy and charge transfer of 2D TMDCs, both being established by the above novel approach.

• 한국국방기술학회 논문지
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• 제6권1호
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• pp.1-6
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• 2024

2차원 평면에 결정구조를 갖는 2차원 소재는 2004년 처음 발견된 그래핀(Graphene)을 시작으로 2011년 발견된 맥신(MXene)에 이르기까지 나노기술 분야의 차세대 소재로 주목받고 있다. 2차원 소재 중 광범위하게 연구되고 있는 그래핀, 맥신, 육방정계 질화붕소, 전이금속 칼코게나이드의 특성을 소개하고 각 2차원 소재를 국방 분야에 적용할 수 있는 기술을 소개하여 차세대 무기체계 및 전력지원체계에 적용할 수 있는 방안을 제시하고자 한다.