Scanning tunneling spectroscopy of Majorana zero modes in a Kitaev spin liquid

Autor:	Lucas Freitas, Reinhold Egger, Rodrigo Pereira, Tim Bauer
Rok vydání:	2022
Předmět:	Condensed Matter - Strongly Correlated Electrons Strongly Correlated Electrons (cond-mat.str-el) FOS: Physical sciences
DOI:	10.48550/arxiv.2209.12930
Popis:	We describe scanning tunneling spectroscopic signatures of Majorana zero modes (MZMs) in Kitaev spin liquids. The tunnel conductance is determined by the dynamical spin correlations of the spin liquid, which we compute exactly, and by spin-anisotropic cotunneling form factors. Near a $\mathbb{Z}_2$ vortex, the tunnel conductance has a staircase voltage dependence, where conductance steps arise from MZMs and (at higher voltages) from additional vortex configurations. By scanning the probe tip position, one can detect the vortex locations. Our analysis suggests that topological magnon bound states near defects or magnetic impurities generate spectroscopic signatures that are qualitatively different from those of MZMs. Comment: 14 pages, 7 figures
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b852cf52a36195fcd021050ab8758998 Zobrazit plný text záznamu