Tunable THz Surface Plasmon Polariton based on Topological Insulator-Layered Superconductor Hybrid Structure

Autor:	Li, Mingda, Dai, Zuyang, Cui, Wenping, Wang, Zhe, Katmis, Ferhat, Le, Peisi, Wang, Jiayue, Wu, Lijun, Zhu, Yimei
Rok vydání:	2014
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 89, 235432 (2014)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.89.235432
Popis:	We theoretically investigate the surface plasmon polariton (SPP) at the interface between 3D strong topological insulator (TI) and layered superconductor-magnetic insulator structure. The tunability of SPP through electronic doping can be enhanced when the magnetic permeability of the layered structure becomes higher. When the interface is gapped by superconductivity or perpendicular magnetism, SPP dispersion is further distorted, accompanied by a shift of group velocity and penetration depth. Such a shift of SPP reaches maximum when the magnitude of Fermi level approaches the gap value, and may lead to observable effects. The tunable SPP at the interface between layered superconductor and magnetism materials in proximity to TI surface may provide new insight in the detection of Majorana Fermions. Comment: 6 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1403.1283 Zobrazit plný text záznamu View this record from Arxiv