2012/01/09 by M. Zhang, Meigen Zhang, J. J. Ying +13
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Corporate Taxation and Avoidance #Doping #Electrical resistivity and conductivity #Iron-based superconductors research #Materials science #Order (exchange) #Pairing #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Rare-earth and actinide compounds #Spin (aerodynamics) #Superconductivity #Thermodynamics #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.85.092503
published as Phys. Rev. B 85, 092503 (2012)
arxiv created 2012/01/09 · openalex publication_date 2012/03/14 · arxiv updated 2012/06/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We establish the phase diagram of the Eu_1\ensuremath-xLaxFe2As2 system as a function of doping level x and pressure by measuring the resistivity and magnetic susceptibility. Increased pressure can suppress the spin-density-wave (SDW) and structural transitions very efficiently, while enhancing the antiferromagnetic (AFM) transition temperature TN of Eu2+. Superconductivity coexists with SDW order at low pressure and always coexists with Eu2+ AFM order. The results suggest that the Eu2+ spin dynamics is unconnected with the superconducting pairing taking place in the two-dimensional Fe-As plane, but it can strongly affect superconducting coherence along the c axis.