Angle-Resolved Photoemission Spectroscopy on by Junfeng He

By Junfeng He

This e-book mostly makes a speciality of the research of the high-temperature superconductor Bi2Sr2CaCu2O8+δ (Bi2212) and single-layer FeSe movie grown on SrTiO3 (STO) substrate through angle-resolved photoemission spectroscopy (ARPES). It offers the 1st digital proof for the foundation of the anomalous high-temperature superconductivity in single-layer FeSe grown on SrTiO3 substrate. coexisted sharp-mode couplings were pointed out in superconducting Bi2212. the 1st ARPES learn on single-layer FeSe/STO movies has supplied key insights into the digital foundation of superconductivity during this procedure. A part diagram and digital indication of excessive Tc and insulator to superconductor crossover were verified within the single-layer FeSe/STO motion pictures. Readers will locate crucial details at the thoughts used and engaging actual phenomena saw through ARPES.

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Extra resources for Angle-Resolved Photoemission Spectroscopy on High-Temperature Superconductors: Studies of Bi2212 and Single-Layer FeSe Film Grown on SrTiO3 Substrate

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Chen and Prof. Xu’s groups [2]. After that, tunable laser-based angle-resolved photoemission system, laser-based spin-resolved ARPES system, and laser-based time-of-flight ARPES system have been developed. The research results to be presented in the following chapters were all performed on those newly developed systems, and the super-high resolution of the laser light source was key to the success of the research on cuprates. In this chapter, a general introduction of the typical ARPES systems will be given and the performance of the aforementioned laser-based ARPES systems will be described.

Of course, the energy of the excited electrons is also changed due to the potential barrier. If we define the momentum of the electrons in the vacuum as K out and the corresponding energy as E out , then: K out,x = K in,x ; K out,y = K in,y ; K out,z = K in,z . 7) E out = E in − Φ. 8) If the materials are 2D or quasi-2D (for example, cuprate high-temperature superconductors, selected iron-based superconductors, thin films), only the in-plane momenta (K i,x , K i,y ) are concerned. By using Eqs.

85, 2581–2584 (2000) 28. : D-wave pairing near a spin-density-wave instability. Phys. Rev. B 34(11), 8190–8192 (1986) 29. : Non-Fermi-liquid states and pairing instability of a general model of copper oxide metals. Phys. Rev. B 55(21), 14554–14580 (1997) 30. : Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors. Nature (London) 412(6846), 510–514 (2001) 31. : Mass-renormalized electronic excitations at (π , 0) in the superconducting state of Bi2 Sr2 CaCu2 O8+δ .

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