Lieb lattices and pseudospin-1 dynamics under barrier- and well-like electrostatic interactions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F23%3A00577211" target="_blank" >RIV/61389005:_____/23:00577211 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.physe.2023.115738" target="_blank" >https://doi.org/10.1016/j.physe.2023.115738</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physe.2023.115738" target="_blank" >10.1016/j.physe.2023.115738</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Lieb lattices and pseudospin-1 dynamics under barrier- and well-like electrostatic interactions

Popis výsledku v původním jazyce

This work considers the confining and scattering phenomena of electrons in a Lieb lattice subjected to the influence of a rectangular electrostatic barrier. In this setup, hopping amplitudes between nearest neighbors in orthogonal directions are considered different, and the next-nearest neighbor interaction describes spin-orbit coupling. This makes it possible to confine electrons and generate bound states, the exact number of which is exactly determined for null momentum parallel to the barrier. In such a case, it is proved that one even and one odd bound state is always generated, and the number of bound states increases for non-null and increasing values of the parallel momentum. That is, current-carrying states are generated. In the scattering regime, the energies are determined so that resonant tunneling occurs. The existence of perfect tunneling energy in the form of super-Klein tunneling is proved to exist regardless of the bang gap opening. Finally, it is shown that perfect reflection appears when solutions are coupled to the intermediate flat-band solution.

Název v anglickém jazyce

Lieb lattices and pseudospin-1 dynamics under barrier- and well-like electrostatic interactions

Popis výsledku anglicky

This work considers the confining and scattering phenomena of electrons in a Lieb lattice subjected to the influence of a rectangular electrostatic barrier. In this setup, hopping amplitudes between nearest neighbors in orthogonal directions are considered different, and the next-nearest neighbor interaction describes spin-orbit coupling. This makes it possible to confine electrons and generate bound states, the exact number of which is exactly determined for null momentum parallel to the barrier. In such a case, it is proved that one even and one odd bound state is always generated, and the number of bound states increases for non-null and increasing values of the parallel momentum. That is, current-carrying states are generated. In the scattering regime, the energies are determined so that resonant tunneling occurs. The existence of perfect tunneling energy in the form of super-Klein tunneling is proved to exist regardless of the bang gap opening. Finally, it is shown that perfect reflection appears when solutions are coupled to the intermediate flat-band solution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/EF18_053%2F0017163" target="_blank" >EF18_053/0017163: Fyzici v pohybu II</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physica E: Low-Dimensional Systems and Nanostructures

ISSN

1386-9477

e-ISSN

1873-1759

Svazek periodika

152

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

115738

Kód UT WoS článku

001080444000001

EID výsledku v databázi Scopus

2-s2.0-85156211898