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Topological spin-plasma waves
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DOI：10.1103/PhysRevB.104.075413.png)
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The surface of a topological insulator hosts Dirac electronic states with the spin-momentum locking, which constrains spin orientation perpendicular to electron momentum. As a result, collective plasma excitations in the interacting Dirac liquid manifest themselves as coupled charge- and spin-waves. Here we demonstrate that the presence of the spin component enables effective coupling between plasma waves and spin waves at interfaces between the surface of a topological insulator and insulating magnet. Moreover, the helical nature of spin-momentum locking textures provides the phase winding in the coupling between the spin and plasma waves that makes the spectrum of hybridized spin-plasma modes to be topologically nontrivial. We also show that such topological modes lead to a large thermal Hall response.
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STATE
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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引用论文
Magnon-induced superconductivity in a topological insulator coupled to ferromagnetic and antiferromagnetic insulators耦合到铁磁和反铁磁绝缘体的拓扑绝缘体中的磁振子诱导的超导性.png)
PHYSICAL REVIEW B
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PHYSICAL REVIEW BIF3.7
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