Magnons, the quanta of spin-wave excitations in magnetically ordered systems, enable low-power information transmission and processing with negligible Joule heating, making them a promising platform for spintronic applications. Beyond their spin angular momentum, magnons can also possess a well-defined intrinsic orbital angular momentum (OAM), which provides an additional degree of freedom and transforms conventional magnons into twisted magnons. The topological charge associated with OAM can be externally tuned and is robust against magnetic damping, thereby greatly enhancing the dimensionality, controllability, and functional versatility of magnonic systems. In this review, we systematically discuss the fundamental physical properties of twisted magnons, their generation and detection methods, and recent advances in their applications.
At present, two primary approaches have been proposed for generating twisted magnons: excitation by a radial electric field perpendicular to the propagation direction, and phase modulation using a magnetic spiral phase plate. In addition, coupling to an applied electric field through the Aharonov–Casher effect enables dynamic control of the topological charge. The OAM carried by twisted magnons can be electrically detected via spin pumping combined with the inverse spin Hall effect (ISHE). Owing to the unbounded spectrum of OAM eigenvalues, mutually orthogonal OAM states can be employed to construct high-dimensional qubits, offering a powerful new degree of freedom for quantum information encoding.
Furthermore, by exploiting the lifting of chiral degeneracy in ferromagnetic nanodisks through dynamic dipolar interactions and/or interfacial Dzyaloshinskii–Moriya interactions, magnonic Bloch spheres can be precisely initialized, manipulated, and electrically detected. Extending OAM to antiferromagnetic systems further enables symmetry-protected logic-gate operations, including phase-shift gates, Pauli gates, square-root-of-NOT gates, and Hadamard gates. These capabilities are expected to facilitate the construction of arbitrary quantum circuits and support multiplexed data transfer. Taken together, the unique properties of twisted magnons open new avenues for next-generation ultrafast information-processing technologies with high fidelity and low energy consumption.