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Volumn 81, Issue 14, 2010, Pages

Constraints imposed by symmetry on pairing operators for the iron pnictides

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EID: 77955182720     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.81.144509     Document Type: Article
Times cited : (6)

References (71)
  • 4
  • 15
    • 33846417321 scopus 로고    scopus 로고
    • 10.1103/PhysRevB.75.035110
    • S. Lebegue, Phys. Rev. B 75, 035110 (2007). 10.1103/PhysRevB.75.035110
    • (2007) Phys. Rev. B , vol.75 , pp. 035110
    • Lebegue, S.1
  • 19
    • 12044251032 scopus 로고
    • 10.1103/RevModPhys.66.763
    • E. Dagotto, Rev. Mod. Phys. 66, 763 (1994). 10.1103/RevModPhys.66.763
    • (1994) Rev. Mod. Phys. , vol.66 , pp. 763
    • Dagotto, E.1
  • 43
    • 70349918342 scopus 로고    scopus 로고
    • 10.1103/PhysRevB.80.104503
    • H. Eschrig and K. Koepernik, Phys. Rev. B 80, 104503 (2009). 10.1103/PhysRevB.80.104503
    • (2009) Phys. Rev. B , vol.80 , pp. 104503
    • Eschrig, H.1    Koepernik, K.2
  • 45
    • 70349901448 scopus 로고    scopus 로고
    • 10.1209/0295-5075/85/57007
    • Y. Wan and Q.-H. Wang, EPL 85, 57007 (2009). 10.1209/0295-5075/85/57007
    • (2009) EPL , vol.85 , pp. 57007
    • Wan, Y.1    Wang, Q.-H.2
  • 48
    • 77955184105 scopus 로고    scopus 로고
    • Notice that a pair with pseudocrystal momentum Q still has crystal momentum zero (Ref.).
    • Notice that a pair with pseudocrystal momentum Q still has crystal momentum zero (Ref.).
  • 51
    • 55349133085 scopus 로고    scopus 로고
    • 10.1103/PhysRevB.78.140509
    • M. M. Korshunov and I. Eremin, Phys. Rev. B 78, 140509 (R) (2008). 10.1103/PhysRevB.78.140509
    • (2008) Phys. Rev. B , vol.78 , pp. 140509
    • Korshunov, M.M.1    Eremin, I.2
  • 53
    • 56849084648 scopus 로고    scopus 로고
    • 10.1103/PhysRevLett.101.206404;
    • K. Seo, B. A. Bernevig, and J. Hu, Phys. Rev. Lett. 101, 206404 (2008) 10.1103/PhysRevLett.101.206404
    • (2008) Phys. Rev. Lett. , vol.101 , pp. 206404
    • Seo, K.1    Bernevig, B.A.2    Hu, J.3
  • 55
    • 77955219450 scopus 로고    scopus 로고
    • The value of V has been chosen so that the gaps can be seen in a scale where the whole bandwidth range is displayed.
    • The value of V has been chosen so that the gaps can be seen in a scale where the whole bandwidth range is displayed.
  • 56
    • 0000082395 scopus 로고
    • 10.1103/PhysRevLett.74.4281contains a discussion and references on shadow bands in the context of the cuprates.
    • S. Haas, A. Moreo, and E. Dagotto, Phys. Rev. Lett. 74, 4281 (1995) 10.1103/PhysRevLett.74.4281
    • (1995) Phys. Rev. Lett. , vol.74 , pp. 4281
    • Haas, S.1    Moreo, A.2    Dagotto, E.3
  • 62
    • 77955220995 scopus 로고    scopus 로고
    • The five-orbital model being considered here has strong hybridization among the five orbitals and, as a result, the change in basis matrix U does not have a block diagonal structure for all values of the momentum. If this were the case, it would be possible to obtain a pure intraband pairing arising from intraorbital pairing with orbital-dependent strength. Orbitals that do not hybridize with each other could have different pairing strengths, which in turn may produce FSs with independent gaps; it is the case in MgB2 (Ref.) and NdSe2 (Ref.).
    • The five-orbital model being considered here has strong hybridization among the five orbitals and, as a result, the change in basis matrix U does not have a block diagonal structure for all values of the momentum. If this were the case, it would be possible to obtain a pure intraband pairing arising from intraorbital pairing with orbital-dependent strength. Orbitals that do not hybridize with each other could have different pairing strengths, which in turn may produce FSs with independent gaps; it is the case in MgB 2 (Ref.) and NdSe 2 (Ref.).
  • 65
    • 77955209764 scopus 로고    scopus 로고
    • Notice that linear combinations of form factors that create pairs of different sizes would be allowed by symmetry considerations. However, since the spatial extension of the pairs can be determined from experiments, we consider in this work pairing operators that create pairs of a fixed size as given in Eq. .
    • Notice that linear combinations of form factors that create pairs of different sizes would be allowed by symmetry considerations. However, since the spatial extension of the pairs can be determined from experiments, we consider in this work pairing operators that create pairs of a fixed size as given in Eq..
  • 67
    • 77955211832 scopus 로고    scopus 로고
    • This actually results from the symmetry of the pnictides since among the four structural families constituting the iron-based superconducting pnictides the 11, 111, and 1111 are characterized by a nonsymmorphic space group (Ref.). In this kind of systems all energy bands corresponding to elementary band representations are necessarily composite and connected (Ref.).
    • This actually results from the symmetry of the pnictides since among the four structural families constituting the iron-based superconducting pnictides the 11, 111, and 1111 are characterized by a nonsymmorphic space group (Ref.). In this kind of systems all energy bands corresponding to elementary band representations are necessarily composite and connected (Ref.).
  • 68
    • 0034636219 scopus 로고    scopus 로고
    • 10.1209/epl/i2000-00300-9;
    • L. Michel and J. Zac, EPL 50, 519 (2000) 10.1209/epl/i2000-00300-9
    • (2000) EPL , vol.50 , pp. 519
    • Michel, L.1    Zac, J.2
  • 69
    • 0000689426 scopus 로고    scopus 로고
    • 10.1103/PhysRevB.59.5998
    • L. Michel and J. Zak, Phys. Rev. B 59, 5998 (1999). 10.1103/PhysRevB.59. 5998
    • (1999) Phys. Rev. B , vol.59 , pp. 5998
    • Michel, L.1    Zak, J.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.