Quantum behavior of multiple monomeric arrays of spin 1/2

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F26%3A0198480" target="_blank" >RIV/00216305:26620/26:0198480 - isvavai.cz</a>

Result on the web

<a href="https://journals.aps.org/prb/abstract/10.1103/71h7-vhj7" target="_blank" >https://journals.aps.org/prb/abstract/10.1103/71h7-vhj7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/71h7-vhj7" target="_blank" >10.1103/71h7-vhj7</a>

Result language

angličtina

Original language name

Quantum behavior of multiple monomeric arrays of spin 1/2

Original language description

Spin arrays provide a framework for studying cooperative spin phenomena and correlated states. Advances in high-frequency electron paramagnetic resonance (HFEPR) above 90 GHz offer new opportunities to investigate these systems, determine the effect of weak spin-spin interactions, and evaluate their magnitudes. Here, we investigate the cupric coordination compound Cu(L-met)2, where anisotropic S = 12 spins occupy two rotated structural sites, forming weakly coupled spin arrays via supramolecular interactions. Previous EPR studies at 9.7 GHz and 33.6 GHz identified pseudo-one-dimensional magnetic behavior with a single, orientation-independent spectral peak, allowing estimates of exchange couplings. In this work, HFEPR spectra up to 450 GHz and magnetic fields (B0) up to 16 T display a more complex spectral landscape: the number of resonances switches between one and two as a function of the orientation of B0, revealing different dynamical regimes. This behavior indicates a crossover between a collective quantum-correlated phase and a regime where spins behave independently, allowing us to construct quantum dynamical phase diagrams across frequency and field space. These findings reinforce molecular compounds as promising platforms for exploring tunable spin dynamics, with implications for quantum information science. The observation of spin-spin interactions persisting at room temperature highlights their potential for robust quantum coherence in molecular systems.

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

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OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

<a href="/en/project/GM24-11928M" target="_blank" >GM24-11928M: Control of quantum phases and entanglement by magnetic field in molecular systems</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Name of the periodical

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Volume of the periodical

112

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

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UT code for WoS article

001539312500002

EID of the result in the Scopus database

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