Zobrazeno 1 - 10
of 330
pro vyhledávání: '"Bouhon, A."'
We demonstrate that periodically driven quantum rotors provide a promising and broadly applicable platform to implement multi-gap topological phases, where groups of bands can acquire topological invariants due to non-Abelian braiding of band degener
Externí odkaz:
http://arxiv.org/abs/2408.16848
Autor:
Wahl, Thorsten B., Jankowski, Wojciech J., Bouhon, Adrien, Chaudhary, Gaurav, Slager, Robert-Jan
We report on a class of gapped projected entangled pair states (PEPS) with non-trivial Euler topology motivated by recent progress in band geometry. In the non-interacting limit, these systems have optimal conditions relating to saturation of quantum
Externí odkaz:
http://arxiv.org/abs/2407.12902
Autor:
Jankowski, Wojciech J., Morris, Arthur S., Davoyan, Zory, Bouhon, Adrien, Ünal, F. Nur, Slager, Robert-Jan
Publikováno v:
Phys. Rev. B 110, 075135 (2024)
We discuss a class of three-band non-Abelian topological insulators in three dimensions that carry a single bulk Hopf index protected by spatiotemporal ($\mathcal{PT}$) inversion symmetry. These phases may also host subdimensional topological invaria
Externí odkaz:
http://arxiv.org/abs/2405.17305
We analyze quantum-geometric bounds on optical weights in topological phases with pairs of bands hosting non-trivial Euler class, a multi-gap invariant characterizing non-Abelian band topology. We show how the bounds constrain the combined optical we
Externí odkaz:
http://arxiv.org/abs/2311.07545
We comment on the recent paper ``Floquet non-Abelian topological insulator and multifold bulk-edge correspondence" by Tianyu Li and Haiping Hu, Nat. Comm. {\bf 14}, 6418 (2023). Apart from the fact that the authors unjustly imply to study multi-gap t
Externí odkaz:
http://arxiv.org/abs/2310.12782
The emergence of two-band nodal points (i.e. Weyl nodes) in gapless topological phases only requires translational symmetry, however, their necessary existence in the electronic band structure of materials can be deduced when additional crystalline s
Externí odkaz:
http://arxiv.org/abs/2309.05907
Publikováno v:
Phys. Rev. B 109, 165125 (2024)
We report on a certain class of three-dimensional topological insulators and semimetals protected by spinless $\mathcal{P}\mathcal{T}$ symmetry, hosting an integer-valued bulk invariant. We show using homotopy arguments that these phases host multi-g
Externí odkaz:
http://arxiv.org/abs/2308.15555
Publikováno v:
Phys. Rev. B 110, 064202 (2024)
We study the effect of disorder in systems having a non-trivial Euler class. As these recently proposed multi-gap topological phases come about by braiding non-Abelian charged band nodes residing between different bands to induce stable pairs within
Externí odkaz:
http://arxiv.org/abs/2306.13084
The past few years have seen a revived interest in quantum geometrical characterizations of band structures due to the rapid development of topological insulators and semi-metals. Although the metric tensor has been connected to many geometrical conc
Externí odkaz:
http://arxiv.org/abs/2303.02180
Publikováno v:
New J. Phys. 26, 023014 (2024)
Many previous studies of Andreev reflection have demonstrated that unusual effects can occur in media which have a nontrivial bulk topology. Following this line of investigation, we study Andreev reflection in topological Euler materials by analysing
Externí odkaz:
http://arxiv.org/abs/2302.07094