Magnetically tuned Kondo effect in a molecular double quantum dot: Role of the anisotropic exchange

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00521572" target="_blank" >RIV/68378271:_____/19:00521572 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/19:10398921

Result on the web

<a href="https://doi.org/10.1021/acs.jpcc.9b00783" target="_blank" >https://doi.org/10.1021/acs.jpcc.9b00783</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.9b00783" target="_blank" >10.1021/acs.jpcc.9b00783</a>

Result language

angličtina

Original language name

Magnetically tuned Kondo effect in a molecular double quantum dot: Role of the anisotropic exchange

Original language description

We investigate theoretically and experimentally the singlet–triplet Kondo effect induced by a magnetic field in a molecular junction. Temperature-dependent conductance, G(T), is calculated by the numerical renormalization group, showing a strong imprint of the relevant low-energy scales, such as the Kondo temperature, exchange, and singlet–triplet splitting. We demonstrate the stability of the singlet–triplet Kondo effect against weak spin anisotropy, modeled by an anisotropic exchange. Moderate spin anisotropy manifests itself by lowering the Kondo plateaus, causing the G(T) to deviate from a standard temperature dependence, expected for a spin-half Kondo effect. We propose this scenario as an explanation for anomalous G(T), measured in an organic diradical molecule coupled to gold contacts. We uncover certain new aspects of the singlet–triplet Kondo effect, such as coexistence of spin-polarization on the molecule with Kondo screening.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

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

Project

<a href="/en/project/GA16-19640S" target="_blank" >GA16-19640S: Vibrational effects in nonequilibrium electronic transport through nanosystems</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Volume of the periodical

123

Issue of the periodical within the volume

18

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

11917-11925

UT code for WoS article

000467781000063

EID of the result in the Scopus database

2-s2.0-85065620937