Chiral transport and electronic correlations in surface states of HfNiSn single crystals

Autor:	Steinke, L., Kistner-Morris, J. J., Lovorn, T. F., He, H., Hillier, A. D., Miao, P., Zellman, S., Klemm, M., Green, M., Gonzalez, O., MacDonald, A. H., Aronson, M. C.
Rok vydání:	2018
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	In most topological insulators, the valence and conduction band appear in reverse or inverted order compared to an equivalent insulator with isolated atoms. Here, we explore a different route towards topologically nontrivial states that may arise from metallic states present on the surface of bulk insulators without such band inversion. High-quality single crystals of HfNiSn show surface transport with weak anti-localization, consistent with a two-dimensional metallic state in the presence of strong spin-orbit coupling. Nonlinear I(V) curves indicate electronic correlations related to a chiral, nonlocal transport component that is qualitatively similar to a quantum Hall edge state, yet in the absence of external magnetic fields. The correlations themselves may play a decisive role in creating an apparent topologically nontrivial state on the HfNiSn surface. Comment: 6 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1805.06337 Zobrazit plný text záznamu View this record from Arxiv