Topological chiral magnonic edge mode in a magnonic crystal

By Ryuichi Shindou, R. Matsumoto, Shuichi Murakami, J. Ohe. 2012

332 citations recorded by the source corpus.

Topological phases have been explored in various fields in physics such as spintronics, photonics, liquid helium, correlated electron system and cold-atomic system. This leads to the recent foundation of emerging materials such as topological band insulators, topological photonic crystals and topological superconductors/superfluid. In this paper, we propose a topological magnonic crystal which provides protected chiral edge modes for magnetostatic spin waves. Based on a linearized Landau-Lifshitz equation, we show that a magnonic crystal with the dipolar interaction acquires spin-wave volume-mode band with non-zero Chern integer. We argue that such magnonic systems are accompanied by the same integer numbers of chiral spin-wave edge modes within a band gap for the volume-mode bands. In these edge modes, the spin wave propagates in a unidirectional manner without being scattered backward, which implements novel fault-tolerant spintronic devices.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/c4f328d2a0c6b923f2f9cfb862287e38200da5fc

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In Atomic and Molecular Physics, and Optics

In Condensed Matter Physics

Citations in the corpus

Topological photonics (2014, background): “Moreover, the concepts and realizations of topological photonics can be translated to other bosonic systems like surface plasmons, excitons [82], excitonpolaritons [83, 84], phonons [85, 86] and magnons [87].”
Opportunities at the Frontiers of Spintronics (2015, background): “Even topologically non-trivial magnonic band structures generated by periodic patterning are conceivable that give rise to chiral edge modes [156,157].”
Symmetry and Topology in Non-Hermitian Physics (2018, methodology): “Our topological classification describes topological phenomena of free bosons [24–32].”