Phase diagram of the isovalent phosphorous-substituted 122-type iron pnictides

Journal Article · Mon May 11 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.91.205110· OSTI ID:1234458

Zhao, YuanYuan ^[1]; Tai, Yuan -Yen ^[2]; Ting, C. S. ^[1]

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1. Univ. of Houston, Houston, TX (United States)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Recent experiments demonstrated that the isovalent doping system gives a similar phase diagram as the heterovalent doped cases. For example, with the phosphorous (P) doping, the magnetic order in BaFe₂(As_1–xP_x)₂ compound is first suppressed, then the superconductivity dome emerges to an extended doping region but eventually it disappears at large x. With the help of a minimal two-orbital model for both BaFe₂As₂ and BaFe₂P₂, together with the self-consistent lattice Bogoliubov-de Gennes (BdG) equation, we calculate the phase diagram against the P content x in which the doped isovalent P atoms are treated as impurities. Furthermore, we show that our numerical results can qualitatively compare with the experimental measurements.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: E-1146; AC52-06NA25396
• OSTI ID: 1234458
• Alternate ID(s): OSTI ID: 1179299
• Report Number(s): LA-UR-14-29601; PRBMDO
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 20; ISSN 1098-0121
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY