Abstract
Atomic manipulation and interface engineering techniques have provided an intriguing approach to custom-designing topological superconductors and the ensuing Majorana zero modes, representing a paradigm for the realization of topological quantum computing and topology-based devices. Magnet-superconductor hybrid (MSH) systems have proven to be experimentally suitable to engineer topological superconductivity through the control of both the complex structure of its magnetic layer and the interface properties of the superconducting surface. Here, we demonstrate that two-dimensional MSH systems containing a magnetic skyrmion lattice provide an unprecedented ability to control the emergence of topological phases. By changing the skyrmion radius, which can be achieved experimentally through an external magnetic field, one can tune between different topological superconducting phases, allowing one to explore their unique properties and the transitions between them. In these MSH systems, Josephson scanning tunneling spectroscopy spatially visualizes one of the most crucial aspects underlying the emergence of topological superconductivity, the spatial structure of the induced spin–triplet correlations.
Highlights
The ability to create, control, and manipulate topological superconducting phases is quintessential for the realization of topological quantum computing using the non-Abelian braiding statistics of Majorana zero modes[1]
We investigate the emergence of topological superconductivity in a 2–7 and two-dimensional (2D) Magnet-superconductor hybrid (MSH) system, in which a magnetic skyrmion lattice
By varying the skyrmion radius, which can be achieved through the application of an external magnetic field, it is possible to tune these systems between different topological phases, and explore their unique properties and the transitions between them
Summary
The ability to create, control, and manipulate topological superconducting phases is quintessential for the realization of topological quantum computing using the non-Abelian braiding statistics of Majorana zero modes[1]. We demonstrate that the ability to tune between topological phases can be achieved in 2D MSH systems containing a magnetic skyrmion lattice by varying the skyrmion radius As the latter can be experimentally controlled through the application of an external magnetic field[17], the skyrmion MSH system presents an unprecedented opportunity to explore a rich phase diagram of topological superconducting phases, and the transitions between them. As 2D skyrmion MSH systems can be built with currently available experimental techniques, our results open unexplored venues for the investigation and manipulation of topological superconductivity and Majorana zero modes
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