Experimental observation of dual magnetic states in topological insulators.

ABSTRACT: The recently discovered topological phase offers new possibilities for spintronics and condensed matter. Even insulating material exhibits conductivity at the edges of certain systems, giving rise to an anomalous quantum Hall effect and other coherent spin transport phenomena, in which heat dissipation is minimized, with potential uses for next-generation energy-efficient electronics. While the metallic surface states of topological insulators (TIs) have been extensively studied, direct comparison of the surface and bulk magnetic properties of TIs has been little explored. We report unambiguous evidence for distinctly enhanced surface magnetism in a prototype magnetic TI, Cr-doped Bi₂Se₃. Using synchrotron-based x-ray techniques, we demonstrate a "three-step transitio

SUBMITTER: Liu W 

PROVIDER: S-EPMC6368422 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature