Affiliation
$^1$Centro de Fisica de Materiales, CFM/MPC (CSIC-UPV/EHU), Donostia-San Sebastian
$^2$Donostia International Physics Center (DIPC), Donostia-San Sebastian
$^3$Ikerbasque, Basque Foundation for Science
Title
Hunting for in-gap states in a superconductor towards topological superconductivity
Abstract
Recently, the introduction of impurity states in the superconducting gap has received a lot of attention. Indeed, the search of a new superconducting state called topological superconductivity is strongly based in the combination of doping classical (s-wave) superconductors with magnetic impurities that arrange spins in a chiral fashion. We present the first results of controlled single-atom manipulation to assemble a chain of Cr atoms on a Bi$_2$Pd superconductor [1,2,3]. Such magnetic impurities on different substrates allow us to explore many-body effects and exotic phenomena in different experimental spin systems giving an understanding on the parameters on each system.
References:
[1] Mier C., Hwang J., Kim J., Bae Y., Nabeshima F., Imai Y., Maeda A., Lorente N., Heinrich A. and Choi D.-J., Atomic Manipulation of In-gap States on the ꞵ-Bi2Pd Superconductors, Physical Review B 104 (4),
045406 (2021).
[2] Cristina Mier, Deung-Jang Choi, Nicolás Lorente, Calculations of in-gap states of ferromagnetic spin chains on -wave wide-band superconductors, Physical Review B 104 (24), 245415 (2021).
[3] Cristina Mier, Deung-Jang Choi, Nicolás Lorente Moiré dispersion of edge states in spin chains on superconductors, Phys. Rev. Research 4, L032010 (2022).