Zobrazeno 1 - 10
of 14 351
pro vyhledávání: '"Flat bands"'
Theoretical quest of flat-band tight-binding models usually relies on lattice structures on which electrons reside. Typical examples of candidate lattice structures include the Lieb-type lattices and the line graphs. Meanwhile, there can be accidenta
Externí odkaz:
http://arxiv.org/abs/2411.17092
The recent discovery of topological flat bands in twisted transition metal dichalcogenide homobilayers and multilayer graphene has sparked significant research interest. We propose a new platform for realizing tunable topological moire flat bands: tw
Externí odkaz:
http://arxiv.org/abs/2411.10901
Autor:
Zhang, Hongyun, Li, Qian, Scheer, Michael G., Wang, Renqi, Tuo, Chuyi, Zou, Nianlong, Chen, Wanying, Li, Jiaheng, Cai, Xuanxi, Bao, Changhua, Li, Ming-Rui, Deng, Ke, Watanabe, Kenji, Taniguchi, Takashi, Ye, Mao, Tang, Peizhe, Xu, Yong, Yu, Pu, Avila, Jose, Dudin, Pavel, Denlinger, Jonathan D., Yao, Hong, Lian, Biao, Duan, Wenhui, Zhou, Shuyun
Publikováno v:
PNAS 121, (43) e2410714121 (2024)
Flat bands and nontrivial topological physics are two important topics of condensed matter physics. With a unique stacking configuration analogous to the Su-Schrieffer-Heeger (SSH) model, rhombohedral graphite (RG) is a potential candidate for realiz
Externí odkaz:
http://arxiv.org/abs/2411.07906
Autor:
Menke, Henri, Enderlein, Niklas, Tseng, Yi-Ting, Bockstedte, Michel, Maultzsch, Janina, Sangiovanni, Giorgio, Hansmann, Philipp
We propose three transition-metal adatom systems on 3C-SiC(111) surfaces as a versatile platform to realize massless Dirac fermions and flat bands with strong electronic correlations. Using density functional theory combined with the constrained rand
Externí odkaz:
http://arxiv.org/abs/2410.17165
We present a universal and straightforward algebraic procedure for flat bands construction, polynomial indicator method. Using only Bloch Hamiltonian eigendeterminant functional to identify conditions that guarantee existence of nondispersive eigenva
Externí odkaz:
http://arxiv.org/abs/2410.09587
Autor:
Mukherjee, Amrita, Singh, Bahadur
Extensive recent research on Lieb and kagome lattices highlights their unique physics characterized by the coexistence of Dirac points, van Hove singularities, and flat bands. In these models, flat bands are typically pinned at the center of the Lieb
Externí odkaz:
http://arxiv.org/abs/2410.04515
Flat-band in twisted graphene bilayer has garnered widespread attention, and whether flat-bands can be realized in carbon monolayer is an interesting topic worth exploring in condensed matter physics. In this work, we demonstrate that, based on the t
Externí odkaz:
http://arxiv.org/abs/2410.01142
Autor:
Wang, Yimeng, Zhu, Jihang, Burg, G. William, Swain, Anand, Watanabe, Kenji, Taniguchi, Takashi, Zheng, Yuebing, MacDonald, Allan H., Tutuc, Emanuel
We report on a double moir\'e system consisting of four graphene layers, where the top and bottom pairs form small-twist-angle bilayer graphene, and the middle interface has a large rotational mismatch. This system shows clear signatures of two sets
Externí odkaz:
http://arxiv.org/abs/2411.18785
We analyze the properties of flat-band superconductor junctions that behave differently from ordinary junctions containing only metals with Fermi surfaces. In particular, we show how in the tunneling limit the critical Josephson current between flat-
Externí odkaz:
http://arxiv.org/abs/2410.23121
Autor:
Lao, Junming, Zhou, Tao
In the realm of condensed matter physics, higher-order topological insulators and superconductors have become a focal point of research due to their unique gapless boundary states at lower-dimensional boundaries such as corners and edges. This paper
Externí odkaz:
http://arxiv.org/abs/2410.18872