[2004.03235] Square-root higher-order topological insulator on a decorated honeycomb latticecontact arXivarXiv Twitter

Square-root topological insulators are recently-proposed intriguing topological insulators, where topologically nontrivial nature of Bloch wave functions is inherited from the square of the Hamiltonian. In this paper, we propose that higher-order topological insulators can also have their square-root descendants, which we term square-root higher-order topological insulators. There, emergence of in-gap corner states is inherited from the squared Hamiltonian which hosts higher-order topology. As an example of such systems, we investigate the tight-binding model on a decorated honeycomb lattice, whose squared Hamiltonian includes a breathing kagome-lattice model, a well-known example of higher-order topological insulators. We show that the in-gap corner states appear at finite energies, which coincides with the non-trivial bulk polarization. We further show that the existence of in-gap corner states results in characteristic single-particle dynamics, namely, setting the initial state to b

1 mentions: @tjmlab
Date: 2020/04/08 03:50

Referring Tweets

@tjmlab Square-root higher-order topological insulator on a decorated honeycomb lattice t.co/DyN10mdpA5 ハミルトニアンの二乗からトポロジカル性を引き継いだ平方根トポロジカル絶縁体があるなら、同じように平方根高次トポロジカル絶縁体もあるやろ理論、好き

Related Entries

Read more [2002.12230] Nickelate superconductors -- a renaissance of the one-band Hubbard modelcontact arXivar...
0 users, 5 mentions 2020/02/28 02:21
Read more [2003.05087] Machine learning in physics: The pitfalls of poisoned training setscontact arXivarXiv T...
0 users, 3 mentions 2020/03/12 03:50
Read more [2004.00810] Emergence of Weyl fermions in an epitaxial ferromagnetic oxidecontact arXivarXiv Twitte...
0 users, 2 mentions 2020/04/03 03:51
Read more [2004.04570] Diamagnetic-like response from localised heating of a paramagnetic materialopen searcho...
0 users, 2 mentions 2020/04/24 14:21
Read more [2010.10434] The electron-phonon coupling constant, the Fermi temperature and unconventional superco...
0 users, 2 mentions 2020/10/21 03:51