Nonreciprocity in Magnon Mediated Charge-Spin-Orbital Current Interconversion.

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Tác giả: Felix Fuhrmann, Edgar Galindez-Ruales, Marcel Gasser, Dongwook Go, Rahul Gupta, Gerhard Jakob, Akashdeep Kamra, Mathias Kläui, Sachin Krishnia, José Omar Ledesma-Martin, Yuriy Mokrousov, Minh Duc Tran

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: United States : Nano letters , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 680133

In magnetic systems, angular momentum is carried by spin and orbital degrees of freedom. Nonlocal devices, comprising heavy-metal nanowires on magnetic insulators like yttrium iron garnet (YIG), enable angular momentum transport via magnons. These magnons are polarized by spin accumulation at the interface through the spin Hall effect (SHE) and detected via the inverse SHE (iSHE). The processes are generally reciprocal, as demonstrated by comparable efficiencies when reversing injector and detector roles. However, introducing Ru, which enables the orbital Hall effect (OHE), disrupts this reciprocity. In our system, magnons polarized through combined SHE and OHE and detected via iSHE are 35% more efficient than the reverse process. We attribute this nonreciprocity to nonzero spin vorticity, resulting from varying electron drift velocities across the Pt/Ru interface. This study highlights the potential of orbital transport mechanisms in influencing angular momentum transport and efficiency in nonlocal spintronic devices.
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