Universal scaling of electron transmission for nearly ballistic and quantum dragon nanodevices

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10500539" target="_blank" >RIV/00216208:11320/25:10500539 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=FlPx726p7Z" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=FlPx726p7Z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chaos.2025.116879" target="_blank" >10.1016/j.chaos.2025.116879</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Universal scaling of electron transmission for nearly ballistic and quantum dragon nanodevices

Popis výsledku v původním jazyce

We predict two different universal scaling regimes for the quantum transmission of metallic nanodevices following the addition of a small amount of uncorrelated disorder. A nanodevice is connected to two thin semi-infinite uniform leads, and the Non-Equilibrium Green&apos;s Function (NEGF) methodology yields the electron transmission 7(E) as a function of the injected electron energy E. Ballistic nanodevices have no disorder and have 7(E)=1 for all E that allow electron propagation in the leads. Quantum dragon nanodevices can have extremely strong properly correlated disorder, and still have 7(E)=1 for all E. Additional uncorrelated site disorder leads to Fano resonances in 7(E). Averaging over the uncorrelated disorder we predict using perturbation theory two universal scaling regimes for 7ave(E). The functional form of both universal scaling regimes depend on the device length and width, energy, and variance of the uncorrelated disorder. The second scaling regime, valid for small but somewhat larger uncorrelated disorder than the first scaling regime, also has the form dependent on the density of states of the system. These two scaling regimes are demonstrated to be valid via large scale computer calculations.

Název v anglickém jazyce

Universal scaling of electron transmission for nearly ballistic and quantum dragon nanodevices

Popis výsledku anglicky

We predict two different universal scaling regimes for the quantum transmission of metallic nanodevices following the addition of a small amount of uncorrelated disorder. A nanodevice is connected to two thin semi-infinite uniform leads, and the Non-Equilibrium Green&apos;s Function (NEGF) methodology yields the electron transmission 7(E) as a function of the injected electron energy E. Ballistic nanodevices have no disorder and have 7(E)=1 for all E that allow electron propagation in the leads. Quantum dragon nanodevices can have extremely strong properly correlated disorder, and still have 7(E)=1 for all E. Additional uncorrelated site disorder leads to Fano resonances in 7(E). Averaging over the uncorrelated disorder we predict using perturbation theory two universal scaling regimes for 7ave(E). The functional form of both universal scaling regimes depend on the device length and width, energy, and variance of the uncorrelated disorder. The second scaling regime, valid for small but somewhat larger uncorrelated disorder than the first scaling regime, also has the form dependent on the density of states of the system. These two scaling regimes are demonstrated to be valid via large scale computer calculations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/GF23-05263K" target="_blank" >GF23-05263K: Supravodivé nanohybridy mimo rovnováhu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Chaos, Solitons and Fractals

ISSN

0960-0779

e-ISSN

1873-2887

Svazek periodika

199

Číslo periodika v rámci svazku

říjen

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

116879

Kód UT WoS článku

001543395600001

EID výsledku v databázi Scopus

2-s2.0-105011493930