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Temperature dependence of chemical potential in Bi2212

Temperature dependence of chemical potential in Bi2212. Experiment. 試料 Bi 2 Sr 2-x La x CaCu 2 O 8+d = 0.02, 0.03, 0.05, 0.06, Bi 2 Sr 2 Y 0.2 Ca 0.8 Cu 2 O 8+d d = 0 .08, 0.15 (Tc ～ 30 K, 85 K) 測定 ・ XPS 励起光 Mg K a 線 (1253.6 eV) 分解能　 0.7 eV T = 8.5 K, 100 K, 200 K, 300 K ・ ARPES

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Temperature dependence of chemical potential in Bi2212

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  1. Temperature dependence of chemical potential in Bi2212

  2. Experiment • 試料 • Bi2Sr2-xLaxCaCu2O8+d • = 0.02, 0.03, 0.05, 0.06, Bi2Sr2Y0.2Ca0.8Cu2O8+d d= 0.08, 0.15 (Tc～30 K, 85 K) 測定 ・XPS 励起光 Mg Ka線(1253.6 eV) 分解能　0.7 eV • T = 8.5 K, 100 K, 200 K, 300 K • ・ARPES • 励起光　19 eV • 分解能 14 meV • T= 10 K, 100K, 200K, 300K

  3. Temperature Dependence of Core-level Spectra (d=0.02)

  4. Temperature Dependence of Core-level Spectra (d=0.03)

  5. Temperature Dependence of Core-level Spectra (d=0.05)

  6. Temperature Dependence of Core-level Spectra (d=0.06)

  7. Temperature Dependence of Core-level Spectra (d=0.08)

  8. Temperature Dependence of Core-level Spectra (d=0.15)

  9. Temperature Dependence of Energy Position I (Relative to energy at 8.5 K) ホールのドープとともに温度変化によるシフト量が抑制

  10. Temperature Dependence of Energy Position II

  11. Temperature Dependence of Energy Position III (Relative to energy at d=0.06) 非超伝導相ではすべての元素が同じ方向にシフトし 超伝導相でSr以外は逆にシフト

  12. Comparison with Theoretical Works J. Jaklic and P. Prelovsek, PRL. 77, 892 (1996)

  13. Temperature dependence of valence band spectra I d=0.03 Core-levelと同程度のシフト

  14. Temperature dependence of valence band spectra II d=0.08 d=0.03に比べてわずかな変化

  15. Hysteresis (Doping Dependence) (Low→High→Low Temperature)

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