Fizika Nizkikh Temperatur: Volume 47, Number 11 (November 2021), p. 981-988 ( to contents , go back )
Local spin-triplet superconductivity in half-metallic manganites: A perspective platform for high-temperature topological superconductivity
V. N. Krivoruchko
Donetsk Institute for Physics and Engineering named after A. A. Galkin of the National Academy of Sciences of Ukraine Kyiv 03028, Ukraine
Received May 15, 2021, published online September 24, 2021
Topological materials and their unusual properties are nowadays a focus of experimental and theoretical research. Promising systems where topological superconducting phases can be realized are materials with a spin-triplet superconducting state. Yet, in the nature superconductors with a spin-triplet p-wave pairing are exceptions. The experimentally accessible way to overcome this bottleneck is spin-triplet pairing induced in proximitized structures of spin-singlet superconductors with time-reversal symmetry breaking counterparts. We discuss the possibility of creating such materials using superconductor–half-metallic manganite nano-structures. A unique promising feature of the proximity-coupled hybrid structures is high-temperature local triplet superconductivity in half-metallic manganites. The experimental evidence of a latent spin-triplet pairing in half-metallic manganites is presented and conditions favoring the topological superconducting state in nanostructures based on them are discussed.
Key words: half-metallic manganites, localized superconducting Cooper pairs, topological superconductivity, superconductor–ferromagnet heterostructures.