Geometrical Frustration, Correlated Disorder, and Emerging Order in a Corrugated C_{60} Monolayer.
Phys Rev Lett
; 131(18): 186201, 2023 Nov 03.
Article
em En
| MEDLINE
| ID: mdl-37977638
Under certain experimental conditions, the deposition of C_{60} molecules onto an atomically flat copper surface gives rise to the formation of corrugated islands. This corrugation, which reflects a molecular displacement perpendicular to the surface plane, presents an astonishing pattern: It is well described by a frustrated Ising spin Hamiltonian whose thermodynamics is compatible with a spin liquid about to transit toward an ordered zigzag state. Here we study the statistical properties of such a molecular corrugation using a structure factor analysis, a tool generally employed in frustrated magnetism. More specifically, the real and reciprocal space analysis of pairwise molecule correlations allows us to demonstrate that the C_{60}/Cu system, in which magnetism is totally absent, has all the characteristics of a triangular Ising antiferromagnet. Our results indicate that the organization of two-dimensional matter, at the molecular length scale, sometimes turns out to be particularly close to that encountered in highly frustrated magnets.
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MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2023
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Article
País de afiliação:
França