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arXiv 2011.09357cond-mat.mtrl-scicond-mat.mes-hall
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Kagome van-der-Waals Pd3P2S8,带平带

Kagome van-der-Waals Pd3P2S8 with flat band

Seunghyun Park, Soonmin Kang, Haeri Kim, Ki Hoon Lee, Pilkwang Kim, Sangwoo Sim, Nahyun Lee, Balamurugan Karuppannan, Junghyun Kim, Jonghyeon Kim, Kyung Ik Sim,… 展开作者

Seunghyun Park, Soonmin Kang, Haeri Kim, Ki Hoon Lee, Pilkwang Kim, Sangwoo Sim, Nahyun Lee, Balamurugan Karuppannan, Junghyun Kim, Jonghyeon Kim, Kyung Ik Sim, Matthew J. Coak, Yukio Noda, Cheol-Hwan Park, Jae Hoon Kim, Je-Geun Park

摘要:

随着对低维系统的深入研究,寻找具有有趣晶格的材料变得至关重要,这些材料可以剥离成单层。一个特别重要的结构是具有潜在多样性和充满活力的物理学的kagome晶格。我们报道了一种具有独特性质的范德瓦尔斯kagome晶格材料Pd_3P_2S_8,如一个有趣的平带。平带是由Pd的所有5个4d轨道的可能的紧定域态引起的。精确测量抗磁化率以支持从能带结构获得的计算磁化率。我们进一步证明,Pd 3 P2 S8可以剥离到单层,这最终将允许使用电场门控在这个二维可果美晶格中的局域态的可能的控制。

英文摘要:

With the advanced investigations into low-dimensional systems, it has become essential to find materials having interesting lattices that can be exfoliated down to monolayer. One particular important structure is a kagome lattice with its potentially diverse and vibrant physics. We report a van-der-Waals kagome lattice material, Pd3P2S8, with several unique properties such as an intriguing flat band. The flat band is shown to arise from a possible compact-localized state of all five 4d orbitals of Pd. The diamagnetic susceptibility is precisely measured to support the calculated susceptibility obtained from the band structure. We further demonstrate that Pd3P2S8 can be exfoliated down to monolayer, which ultimately will allow the possible control of the localized states in this two-dimensional kagome lattice using the electric field gating.

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