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Electronic Raman Spectroscopy in a Nut Shell (I)

Electronic Raman Spectroscopy in a Nut Shell (I). Yu He SC Meeting Oct 10, 2013. Raman and History Experimental Setup Geometry in Raman Position Raman among other Techniques Raman in Superconducting Materials Mode coupling SC Gap. Main conclusion figures.

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Electronic Raman Spectroscopy in a Nut Shell (I)

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  1. Electronic Raman Spectroscopy in a Nut Shell (I) Yu He SC Meeting Oct 10, 2013 • Raman and History • Experimental Setup • Geometry in Raman • Position Raman among other Techniques • Raman in Superconducting Materials • Mode coupling • SC Gap Main conclusion figures

  2. Electronic Raman Spectroscopy in a Nut Shell (I) • Raman and History • Experimental Setup • Geometry in Raman • Position Raman among other Techniques • Raman in Superconducting Materials • Mode coupling • SC Gap Main conclusion figures

  3. Raman at First Glance

  4. Very Frist Raman by Raman

  5. Milestones to Modern Raman

  6. From Molecules to Solid Molecules (gas and liquid) Resonant Inelastic X-ray Scattering Solid (electronic) Electronic Raman Spectroscopy

  7. Electronic Raman Spectroscopy in a Nut Shell (I) Yu He SC Meeting Oct 10, 2013 • Raman and History • Experimental Setup • Geometry in Raman • Position Raman among other Techniques • Raman in Superconducting Materials • Mode coupling • SC Gap Main conclusion figures

  8. Backscattering Raman electro-optic modulator (EOM) Two-gap dichotomy is NOT universal (in UD regime)

  9. Geometry in Raman

  10. Fig. 2 to rebut the gap-dichotomy picture

  11. Electronic Raman Spectroscopy in a Nut Shell (I) Yu He SC Meeting Oct 10, 2013 • Raman and History • Experimental Setup • Geometry in Raman • Position Raman among other Techniques • Raman in Superconducting Materials • Mode coupling • SC Gap Main conclusion figures

  12. Single Particle vs Two Particles e-ph: Migdal Coulomb: FL, MFL e-magnon

  13. Electronic Conductivity

  14. IR Spectroscopy

  15. Electronic Raman Spectroscopy in a Nut Shell (I) Yu He SC Meeting Oct 10, 2013 • Raman and History • Experimental Setup • Geometry in Raman • Position Raman among other Techniques • Raman in (Superconducting) Materials • Mode coupling • SC Gap Main conclusion figures

  16. Start from single metal? • Not so easy! • Strong screening – small interaction volume • Parabolic dispersion and spherical FS – further reduce cross section

  17. ‘HighTc’ Convenional SC 1.8K V3Si 40K 1.8K 1.8K Nb3Sn

  18. Competition and Mode Coupling Tc ~ 7.2K, Tcdw ~33K, Hc2 ~42kG

  19. Mode description

  20. Highc SC No dichotomy when QP is well defined across all fermi surface Dichotomy appears when QP disappears from N to AN

  21. Highc SC

  22. Highc SC Bi2212

  23. Highc SC

  24. Highc SC M. Le Tacon et al., Nat. Phys. 2, 537 (2006)

  25. Highc SC

  26. Highc SC

  27. Highc SC 0.15 0.22 0.20 Bi2212

  28. Highc SC

  29. Highc SC Two magnonexcitations

  30. FT- Raman RIXS

  31. The END

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