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371 papers · 1 filter
One-dimensional topology and topolectrics of nonsymmorphic Kramers degenerate systems
Max Tymczyszyn, Edward McCann
We describe nonsymmorphic four-band tight-binding models in one dimension with Kramers degeneracy, and propose topolectric-circuit realizations of their topological phases. We begi…
Noninteracting tight-binding models for Fock parafermions
Edward McCann
We model -state Fock parafermions on a lattice in one dimension (with occupation per orbital of ). For a composite number, they may be mapped to -sta…
Exceptionally deficient topological square-root insulators
Subhajyoti Bid, Henning Schomerus
One of the most surprising features of effectively non-Hermitian physical systems is their potential to exhibit a striking nonlinear response and fragility to small perturbations.…
A non-Hermitian Su-Schrieffer-Heeger model with the energy levels of free parafermions
Edward McCann
Using a parent Hermitian tight-binding model on a bipartite lattice with chiral symmetry, we theoretically generate non-Hermitian models for free fermions with orbitals per uni…
Proximity screening greatly enhances electronic quality of graphene
Daniil Domaretskiy, Zefei Wu, Van Huy Nguyen +17
The electronic quality of two-dimensional systems is crucial when exploring quantum transport phenomena. In semiconductor heterostructures, decades of optimization have yielded rec…
Enhanced thermoelectric effects in a driven one-dimensional system
C. X. Zhang, Alessandro Braggio, Alessandro Romito +1
We investigate the thermoelectric properties of a one-dimensional quantum system in the presence of an external driving. We employ Floquet scattering theory to calculate linear-res…