Systematic study of Mn atoms, artificial dimers and chains on superconducting Ta(110)

Abstract

Magnetic adatoms coupled to an $s$-wave superconductor give rise to local bound states, so-called Yu-Shiba-Rusinov states. Focusing on the ultimate goal of tailoring chains of such adatoms into a topologically superconducting phase, we investigate basic building blocks - single Fe and Mn adatoms and Mn dimers on clean superconducting Ta(110) - using scanning tunneling microscopy and spectroscopy. We perform a systematic study of the hybridizations and splittings in dimers, and their dependence on the crystallographic directions and interatomic spacings, in order to identify potentially interesting chain geometries for this novel sample type. Subsequently, we study the spin structure as well as the length dependent Shiba band structure in Mn chains of those geometries using spin-resolved scanning tunneling spectroscopy. All results are compared to the according properties of structurally identical dimers and chains on the previously studied Nb(110), which has almost identical surface structure and electronic properties, but an about three times smaller spin-orbit interaction.

14 pages, 10 figures

References in corpus (16)

• Spin-selective Peierls transition in interacting one-dimensional conductors with spin-orbit interaction
• Topological Superconductivity induced by Ferromagnetic Metal Chains
• Orbital Picture of Yu-Shiba-Rusinov Multiplets
• Evidence of topological Shiba bands in artificial spin chains on superconductors
• Controlled length-dependent interaction of Majorana modes in Yu-Shiba-Rusinov chains
• Spin-orbit coupling induced splitting of Yu-Shiba-Rusinov states in antiferromagnetic dimers
• Quantum spins and hybridization in artificially-constructed chains of magnetic adatoms on a superconductor
• Tuning interactions between spins in a superconductor
• On the preparation and electronic properties of clean superconducting Nb(110) surfaces
• Impurities, Quantum Interference and Quantum Phase Transitions in s-wave superconductors
• Non-Majorana modes in diluted spin chains proximitized to a superconductor
• Yu-Shiba-Rusinov qubit
• Long range and highly tunable interaction between local spins coupled to a superconducting condensate
• Correlating Josephson supercurrents and Shiba states in quantum spins unconventionally coupled to superconductors
• Atomic Manipulation of In-gap States on the $\beta$-Bi${}_2$Pd Superconductor
• Coupling of Yu-Shiba-Rusinov states in 1D chains of Fe atoms on Nb(110)

Cited by in corpus (6)

• Testing the topological nature of end states in antiferromagnetic atomic chains on superconductors
• Majorana quasiparticles in atomic spin chains on superconductors
• Topological superconductivity in Fibonacci quasicrystals
• Wave-function engineering on superconducting substrates: Chiral Yu-Shiba-Rusinov molecules
• Controlling Majorana hybridization in magnetic chain-superconductor systems
• Bridging Quantum and Classical Descriptions of Spin Dynamics in a Dzyaloshinsky-Moriya Trimer