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Volumn 79, Issue 14, 2009, Pages

Superconducting electronic state in optimally doped YBa2 Cu3 O7-δ observed with laser-excited angle-resolved photoemission spectroscopy

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EID: 66349102784     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.79.144528     Document Type: Article
Times cited : (34)

References (63)
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    • In all the samples which we succeeded in observing the superconducting dispersion, CuO chain band was not detected. In the low-energy photoemission process using 6.994 eV light, the final state is considered to be a rather bandlike character, unlike the free-electron picture assumed to be held in conventional high-energy photoemission spectroscopy. This will make the matrix element effect strongly dependent on the incident light energy in relation to the final state and make it difficult to quantitatively simulate its effect. The hν -dependent ARPES using a low-energy synchrotron light will be useful to obtain more information concerning the matrix element effect in YBCO.
    • In all the samples which we succeeded in observing the superconducting dispersion, CuO chain band was not detected. In the low-energy photoemission process using 6.994 eV light, the final state is considered to be a rather bandlike character, unlike the free-electron picture assumed to be held in conventional high-energy photoemission spectroscopy. This will make the matrix element effect strongly dependent on the incident light energy in relation to the final state and make it difficult to quantitatively simulate its effect. The hν -dependent ARPES using a low-energy synchrotron light will be useful to obtain more information concerning the matrix element effect in YBCO.
  • 44
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    • The in-plane and out-of-plane momenta (k and kz) at fixed emission angle θ are given by k = 2m 2 (hν+W- EB) sinθ, kz = 2m 2 [(hν+W- EB) cos2 θ+ V0], where m is the electron mass, W is the work function, and V0 is the inner potential. kz varies periodically as a function of hν, while its absolute value is difficult to be confirmed since V0 is unknown. Regarding k, the region of measurement is limited by | k | <0.74-1 in the present setup with hν=6.99 eV. For details, see, e.g. 3rd ed. Springer, Berlin
    • The in-plane and out-of-plane momenta (k and kz) at fixed emission angle θ are given by k = 2m 2 (hν+W- EB) sinθ, kz = 2m 2 [(hν+W- EB) cos2 θ+ V0], where m is the electron mass, W is the work function, and V0 is the inner potential. kz varies periodically as a function of hν, while its absolute value is difficult to be confirmed since V0 is unknown. Regarding k, the region of measurement is limited by | k | <0.74-1 in the present setup with hν=6.99 eV. For details, see, e.g., S. Hüfner, Photoelectron Spectroscopy: Principles and Applications, 3rd ed. (Springer, Berlin, 2003).
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.