Elemental excitations in MoI3 one-dimensional van der Waals nanowires

Published

November 28, 2022

Author(s)

Fariborz Kargar, Zahra Barani, Nicholas Sesing, Thuc Mai, Topojit Debnath, Huairuo Zhang, Yuhang Liu, Yanbing Zhu, Subhajit Ghosh, Adam Biacchi, Felipe H. da Jornada, Ludwig Bartels, Tehseen Adel, Angela R. Hight Walker, Albert Davydov, Tina Salguero, Roger Lake, Alexander Balandin

Abstract

We report the polarization-dependent Raman spectrum of exfoliated MoI3, a van der Waals material with a "true one-dimensional" crystal structure that can be exfoliated to individual atomic chains. The temperature evolution of several Raman features reveals anomalous behavior suggesting a phase transition of magnetic origin. Theoretical considerations indicate that MoI3 is an easy-plane antiferromagnet with alternating spins along the dimerized chains and with inter-chain helical spin ordering. The calculated frequencies of the phonons and magnons are consistent with the interpretation of the experimental Raman data. The obtained results shed light on the specifics of the phononic and magnonic states in MoI3 and provide a strong motivation for further study of this unique material with potential for future spintronic applications.

Citation

Applied Physics Letters

Volume

121

Issue

22

Pub Type

Journals

Download Paper

https://doi.org/10.1063/5.0129904

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Keywords

One-dimensional materials, van der Waals materials, quantum materials, antiferromagnetic materials, helical spin ordering, Raman spectroscopy, phase transitions

Citation

Kargar, F. , Barani, Z. , Sesing, N. , Mai, T. , Debnath, T. , Zhang, H. , Liu, Y. , Zhu, Y. , Ghosh, S. , Biacchi, A. , H. da Jornada, F. , Bartels, L. , Adel, T. , Hight Walker, A. , Davydov, A. , Salguero, T. , Lake, R. and Balandin, A. (2022), Elemental excitations in MoI3 one-dimensional van der Waals nanowires, Applied Physics Letters, [online], https://doi.org/10.1063/5.0129904, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935637 (Accessed October 9, 2025)