Superconductivity at metal-antiferromagnetic insulator interfaces

Fjærbu, Eirik Løhaugen; Rohling, Niklas; Brataas, Arne

Superconductivity at metal-antiferromagnetic insulator interfaces

Dateien

Fjaerbu_2-wbrs1okczly9.pdfGröße: 884.47 KBDownloads: 352

Datum

2019

Autor:innen

Fjærbu, Eirik Løhaugen

Rohling, Niklas

Brataas, Arne

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2019, 100(12), 125432. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.100.125432

Zusammenfassung

Magnons in antiferromagnetic insulators couple strongly to conduction electrons in adjacent metals. We show that this interfacial tie can lead to superconductivity in a trilayer consisting of a metal sandwiched between two antiferromagnetic insulators. The strength of the induced electron-electron coupling, and consequently the critical temperature, strongly increases with increasing interface exchange coupling. For a fixed electron-electron coupling strength, the critical temperature is proportional to the magnon gap, a natural energy scale. However, the magnon gap also enters in the coupling strength, so that in the weak coupling limit, an enhancement of the magnon gap reduces the critical temperature. We estimate the critical temperature in MnF₂-Au-MnF₂ to be on the order of 1K. Umklapp scattering at metal-antiferromagnet interfaces leads to d-wave pairing, in contrast to p-wave superconductivity mediated by magnons in ferromagnets.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

FJÆRBU, Eirik Løhaugen, Niklas ROHLING, Arne BRATAAS, 2019. Superconductivity at metal-antiferromagnetic insulator interfaces. In: Physical Review B. 2019, 100(12), 125432. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.100.125432

BibTex

@article{Fjrbu2019-03-30T15:22:22ZSuper-47228,
  year={2019},
  doi={10.1103/PhysRevB.100.125432},
  title={Superconductivity at metal-antiferromagnetic insulator interfaces},
  number={12},
  volume={100},
  issn={2469-9950},
  journal={Physical Review B},
  author={Fjærbu, Eirik Løhaugen and Rohling, Niklas and Brataas, Arne},
  note={Article Number: 125432}
}

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