Individual assembly of radical molecules on superconductors: demonstrating quantum spin behavior and bistable charge rearrangement

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00636868" target="_blank" >RIV/68378271:_____/25:00636868 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/25:10491184
Result on the web
<a href="https://hdl.handle.net/11104/0367820" target="_blank" >https://hdl.handle.net/11104/0367820</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsnano.4c12387" target="_blank" >10.1021/acsnano.4c12387</a>

Result language
angličtina
Original language name
Individual assembly of radical molecules on superconductors: demonstrating quantum spin behavior and bistable charge rearrangement
Original language description
High-precision molecular manipulation techniques are used to control the distance between radical molecules on superconductors. Our results show that the molecules can host single electrons with a spin 1/2. By changing the distance between tip and sample, a quantum phase transition from the singlet to doublet ground state can be induced. Due to local screening and charge redistribution, we observe either charged or neutral molecules, which couple in a sophisticated way, showing quantum spin behavior that deviates from the classical spins. Dimers at different separations show multiple Yu-Shiba-Rusinov peaks in tunneling spectroscopy of varying intensity, which are in line with the superconducting two-impurity Anderson model, where singlet (S = 0) and doublet (S = 1/2) ground states are found. The assembly of chains of 3, 4, and 5 molecules shows alternating charge patterns, where the edge molecules always host a charge/spin. The tetramer is observed in two configurations, where the neutral site is moved by one position. We show that these two configurations can be switched by the action of the probing tip in a nondestructive manner, demonstrating that the tetramer is an information unit, based on single-electron charge reorganization.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - 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/GF23-05263K" target="_blank" >GF23-05263K: Superconducting nanohybrids out of equilibrium</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)