Interplay between Classical Magnetic Moments and Superconductivity in Quantum One-Dimensional Conductors: Toward a Self-Sustained Topological Majorana Phase

Bernd Braunecker, Pascal Simon

Research output: Contribution to journalArticlepeer-review

318 Citations (Scopus)

Abstract

We study a one-dimensional interacting electronic liquid coupled to a 1D array of classical magnetic moments and to a superconductor. We show that at low energy and temperature the magnetic moments and the electrons become strongly entangled and that a magnetic spiral structure emerges. For strong enough coupling between the electrons and magnetic moments, the 1D electronic liquid is driven into a topological superconducting phase supporting Majorana fermions without any fine-tuning of external parameters. Our analysis applies at low enough temperature to a quantum wire in proximity to a superconductor when the hyperfine interaction between electrons and nuclear spins is taken into account, or to a chain of magnetic adatoms adsorbed on a superconducting surface.
Original languageEnglish
Article number147202
Number of pages5
JournalPhysical Review Letters
Volume111
Issue number14
DOIs
Publication statusPublished - 1 Oct 2013

Keywords

  • cond-mat.mes-hall
  • cond-mat.str-el

Fingerprint

Dive into the research topics of 'Interplay between Classical Magnetic Moments and Superconductivity in Quantum One-Dimensional Conductors: Toward a Self-Sustained Topological Majorana Phase'. Together they form a unique fingerprint.

Cite this