Frustration-Induced Many-Body Degeneracy in Spin −1/2 Molecular Quantum Rings

Donglin Li; Nan Cao; Marvin Metzelaars; Orlando J. Silveira; Joakim Jestilä; Adolfo Fumega; Tomohiko Nishiuchi; Jose Lado; Adam S. Foster; Takashi Kubo; Shigeki Kawai; Donglin Li; Nan Cao; Marvin Metzelaars; Orlando J. Silveira; Joakim Jestilä; Adolfo Fumega; Tomohiko Nishiuchi; Jose Lado; Adam S. Foster; Takashi Kubo; Shigeki Kawai

doi:10.1021/jacs.5c03112

Frustration-Induced Many-Body Degeneracy in Spin −1/2 Molecular Quantum Rings

Donglin Li, Nan Cao, Marvin Metzelaars, Orlando J. Silveira, Joakim Jestilä, Adolfo Fumega, Tomohiko Nishiuchi, Jose Lado, Adam S. Foster, Takashi Kubo, Shigeki Kawai.

Journal of the American Chemical Society 147 [30] 26208-26217. 2025.

https://doi.org/10.1021/jacs.5c03112

Open Access American Chemical Society (ACS) (Publisher) Materials Data Repository (MDR)

NIMS author(s)

Introduction to new articles

On-Surface Synthesis of Spin −1/2 Molecular Quantum Rings and their spin states

In this study, we investigated the spin states of cyclic pentamers and hexamers (S = 1/2 antiferromagnetic Heisenberg models) fabricated on Au(111) using air-stable phenalenyl derivatives. By combining STM/STS measurements with theoretical simulations, we found that the pentamer exhibits strong geometric frustration, resulting in a four-fold degenerate ground state. The interplay between molecular structure and magnetic interactions creates a unique quantum spin environment, presenting new possibilities for precisely controlling quantum magnetic interactions through molecular architectures.

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Created at: 2025-08-19 03:09:22 +0900 Updated at: 2026-10-01 06:26:56 +0900