Spinpolarisierten Strömen in Supraleiter-Ferromagnet und Antiferromagnet-Ferromagnet-Heterostrukturen.

• Antragsteller: Professor Dr. Konstantin Efetov (†)
• Fachliche Zuordnung: Theoretische Physik der kondensierten Materie
• Förderung: Förderung von 2013 bis 2017
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 218651856

• Erstellungsjahr: 2016

Zusammenfassung der Projektergebnisse

In conclusion, one can say that the project has been very successful. We achieved all our goals and, moreover, opened a new route of research. No difficulties arouse in the execution of announced project schedule. Our group has been pleasantly surprised about the large variety and promising potential applications of the obtained results—especially in the context of superconducting spintronics, a dynamically developing field of research with great perspectives. Here, our publications focusing on the spin currents with and without Josephson charge current should be listed. In addition, our research on the interplay of superconducting and magnetic order parameters sheds light on the mechanism of superconductivity in iron-based pnictides. Also, our investigations performed on these structures bust the research in the field of hybrid mesoscopic structures containing superconducting and magnetic layers allowing construction of highly sensitive and precise measurement instruments potentially based on novel physical features like the found within the project chirality characteristic, which raises hope for, if properly controlled, opening of a new field we may term "chiralitronics" or even "superconducting chiralitronics".

Projektbezogene Publikationen (Auswahl)

• Time-dependent equation for the magnetic order parameter near the quantum critical point in multiband superconductors with a spin-density wave. Phys. Rev. B 88, 224513 (2013)
  Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov
  
• Dynamics of order parameters near stationary states in superconductors with a charge-density wave. Phys. Rev. B 90, 024511 (2014)
  Andreas Moor, Pavel A. Volkov, Anatoly F. Volkov, and Konstantin B. Efetov
  
• Topological defects in systems with two competing order parameters: Application to superconductors with charge- and spin-density waves. Phys. Rev. B 90, 224512 (2014)
  Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov
  
• Chirality and spin transformation of triplet Cooper pairs upon interaction with singlet condensate. Phys. Rev. B 92, 214510 (2015)
  Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov
  
• Hidden order as a source of interface superconductivity. Phys. Rev. B 91, 064511 (2015)
  Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov
  
• Nematic versus ferromagnetic spin filtering of triplet Cooper pairs in superconducting spintronics. Phys. Rev. B 92, 180506(R) (2015)
  Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov
  
• Spin current in junctions composed of multi-band superconductors with a spin-density wave. Supercond. Sci. Technol. 28, 025011 (2015)
  Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov
  
• Excess current in ferromagnet-superconductor structures with fully polarized triplet component. Phys. Rev. B 93, 174510 (2016)
  Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov
  
• Josephson effect in multiterminal superconductor-ferromagnet junctions coupled via triplet components. Phys. Rev. B 93, 104525 (2016)
  Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov