Probing spin dynamics of ultra-thin van der Waals magnets via photon-magnon coupling

Christoph W. Zollitsch*, Safe Khan, Vu Thanh Trung Nam, Ivan A. Verzhbitskiy, Dimitrios Sagkovits, James O'Sullivan, Oscar W. Kennedy, Mara Strungaru, Elton J. G. Santos, John J. L. Morton, Goki Eda, Hidekazu Kurebayashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Layered van der Waals (vdW) magnets can maintain a magnetic order even down to the single-layer regime and hold promise for integrated spintronic devices. While the magnetic ground state of vdW magnets was extensively studied, key parameters of spin dynamics, like the Gilbert damping, crucial for designing ultra-fast spintronic devices, remains largely unexplored. Despite recent studies by optical excitation and detection, achieving spin wave control with microwaves is highly desirable, as modern integrated information technologies predominantly are operated with these. The intrinsically small numbers of spins, however, poses a major challenge to this. Here, we present a hybrid approach to detect spin dynamics mediated by photon-magnon coupling between high-Q superconducting resonators and ultra-thin flakes of Cr2Ge2Te6 (CGT) as thin as 11 nm. We test and benchmark our technique with 23 individual CGT flakes and extract an upper limit for the Gilbert damping parameter. These results are crucial in designing on-chip integrated circuits using vdW magnets and offer prospects for probing spin dynamics of monolayer vdW magnets.
Original languageEnglish
Article number2619
Pages (from-to)1-7
Number of pages7
JournalNature Communications
Issue number1
Publication statusPublished - 5 May 2023

Keywords / Materials (for Non-textual outputs)

  • cond-mat.mtrl-sci


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