Precursors of Majorana modes and their length-dependent energy oscillations probed at both ends of atomic Shiba chains.

ABSTRACT: Isolated Majorana modes (MMs) are highly non-local quantum states with non-Abelian exchange statistics, which localize at the two ends of finite-size 1D topological superconductors of sufficient length. Experimental evidence for MMs is so far based on the detection of several key signatures: for example, a conductance peak pinned to the Fermi energy or an oscillatory peak splitting in short 1D systems when the MMs overlap. However, most of these key signatures were probed only on one of the ends of the 1D system, and firm evidence for an MM requires the simultaneous detection of all the key signatures on both ends. Here we construct short atomic spin chains on a superconductor-also known as Shiba chains-up to a chain length of 45 atoms using tip-assisted atom manipulation in scanning tunne

SUBMITTER: Schneider L 

PROVIDER: S-EPMC9018407 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature