55 citations · 105 across the 7 of their papers we have counts for
7 papers
Tuning topological phases and exceptional points in a non-Hermitian Rice Mele model beyond nearest neighbors
Carolina Martinez-Strasser, Dario Bercioux, Nico Leumer
Exceptional points are degeneracies characteristic of non-Hermitian operators, where eigenvalues and eigenvectors coalesce, rendering the Hamiltonian defective. We investigate the…
Transcendental momentum quantization in semiconducting Rashba nanowires and zero energy states in their normal and superconducting phase
Nico Leumer, Harald Schmid, Milena Grifoni +1
We study finite system properties of the canonical low energy model for a semiconducting nanowire with Rashba spin-orbit coupling. The case of an isolated wire as well as of one pr…
Impurity-induced counter skin-effect and linear modes in non-Hermitian systems
Nico G. Leumer, Dario Bercioux
Non-reciprocal lattice systems are among the simplest non-Hermitian systems, exhibiting several key features absent in their Hermitian counterparts. In this study, we investigate t…
Going beyond Landauer scattering theory to describe spatially-resolved non-local heating and cooling in quantum thermoelectrics
Nico G. Leumer, Denis M. Basko, Rodolfo A. Jalabert +2
Spatially-resolved heating and cooling in nanostructures is nowadays measured with various nanoscale thermometry techniques, including scanning thermometry. Yet the most commonly u…
On symmetric Tetranacci polynomials in mathematics and physics
Nico G. Leumer
In this manuscript, we introduce (symmetric) Tetranacci polynomials as a twofold generalization of ordinary Tetranacci numbers, by considering both non unity coefficients and…
Linear and non-linear transport across a finite Kitaev chain: an exact analytical study
Nico Leumer, Magdalena Marganska, Bhaskaran Muralidharan +1
We present exact analytical results for the differential conductance of a finite Kitaev chain in an N-S-N configuration, where the topological superconductor is contacted on both s…
Exact eigenvectors and eigenvalues of the finite Kitaev chain and its topological properties
Nico Leumer, Magdalena Marganska, Bhaskaran Muralidharan +1
We present a comprehensive, analytical treatment of the finite Kitaev chain for arbitrary chemical potential. We derive the momentum quantization conditions and present exact analy…