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Volumn 83, Issue 4, 2014, Pages

A high-Tc mechanism of iron pnictide superconductivity due to cooperation of ferro-orbital and antiferromagnetic fluctuations

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EID: 84897533667     PISSN: 00319015     EISSN: 13474073     Source Type: Journal    
DOI: 10.7566/JPSJ.83.043704     Document Type: Article
Times cited : (21)

References (33)
  • 7
    • 84897517471 scopus 로고    scopus 로고
    • A comparison between the phonon Green's function D(q) and the quadrupole susceptibility o(q) yields C66=C0 66 = limq!0=!oq+= !0oq+2 = irr Oxy o0+=Oxy o0+, where =(q) (=0(q)) is the renormalized (bare) frequency of the acoustic phonon coupled to the quadrupole Oxy and irr O is the contribution from the irreducible diagrams with respect to D(q). When approaching the structural transition with C66=0, the system also shows the FO instability with Oxy o0+ 1
    • A comparison between the phonon Green's function D(q) and the quadrupole susceptibility o(q) yields C66=C0 66 = limq!0=!oq+= !0oq+2 = irr Oxy o0+=Oxy o0+, where =(q) (=0(q)) is the renormalized (bare) frequency of the acoustic phonon coupled to the quadrupole Oxy and irr O is the contribution from the irreducible diagrams with respect to D(q). When approaching the structural transition with C66=0, the system also shows the FO instability with Oxy o0+ 1
  • 15
    • 84897532137 scopus 로고    scopus 로고
    • The frequency =(q) of a phonon coupled to a quadrupole O is renormalized as !oq+=!0oq+ = irr O oq; 0+=Ooq; 0+1=2 and is expected to show a softening for q QAF due to the enhancement of the AFO fluctuation as observed for the acoustic phonon softened for q 0 due to the FO fluctuation7)
    • The frequency =(q) of a phonon coupled to a quadrupole O is renormalized as !oq+=!0oq+ = irr O oq; 0+=Ooq; 0+1=2 and is expected to show a softening for q QAF due to the enhancement of the AFO fluctuation as observed for the acoustic phonon softened for q 0 due to the FO fluctuation7).
  • 20
    • 84897478107 scopus 로고    scopus 로고
    • Y. Yanagi, Dr. Thesis, Niigata University (2010
    • Y. Yanagi, Dr. Thesis, Niigata University (2010).
  • 27
    • 84897564791 scopus 로고    scopus 로고
    • The phase separation is suppressed by Up as compared to the case with Up = 020) where it occurs for V & 0:38 eV
    • The phase separation is suppressed by Up as compared to the case with Up = 020) where it occurs for V & 0:38 eV.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.