By Junfeng He
This publication usually makes a speciality of the learn of the high-temperature superconductor Bi2Sr2CaCu2O8+δ (Bi2212) and single-layer FeSe movie grown on SrTiO3 (STO) substrate via angle-resolved photoemission spectroscopy (ARPES). It presents the 1st digital facts for the beginning 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 research on single-layer FeSe/STO movies has supplied key insights into the digital foundation of superconductivity during this procedure. A section diagram and digital indication of excessive Tc and insulator to superconductor crossover were confirmed within the single-layer FeSe/STO movies. Readers will locate crucial info at the thoughts used and fascinating actual phenomena saw through ARPES.
Read or Download Angle-Resolved Photoemission Spectroscopy on High-Temperature Superconductors: Studies of Bi2212 and Single-Layer FeSe Film Grown on SrTiO3 Substrate PDF
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Additional info for Angle-Resolved Photoemission Spectroscopy on High-Temperature Superconductors: Studies of Bi2212 and Single-Layer FeSe Film Grown on SrTiO3 Substrate
B 84(23), 235115 (2011) 58. : Strong correlations and magnetic frustration in the high Tc iron pnictides. Phys. Rev. Lett. 101(7), 076401 (2008) 59. : Gap symmetry and structure of Fe-based superconductors. Rep. Prog. Phys. 74(12), 124508 (2011) Chapter 2 Angle-Resolved Photoemission Spectroscopy Angle-resolved photoemission spectroscopy (ARPES) is a powerful tool to directly probe the electronic structure of materials, which has been broadly used in the research of condensed matter physics. It plays an important role in unraveling the mechanism of many exotic phenomena in high-temperature superconductors, graphene, topological insulator, and many other advanced materials [1–6].
Sci. Instrum. 78(5), 053905 (2007) Chapter 3 ARPES Systems ARPES, a powerful experimental tool to detect the electronic structures of materials, has been broadly used in the research on many advanced materials in the past several decades . Direct evidence obtained by ARPES has been helping people to understand the exotic physical phenomena in materials. Meanwhile, progresses have also been made on the ARPES systems. Momentum resolution and spin resolution have been achieved in addition to the original energy resolution in photoemission spectroscopy (PES).
If Φ S > Φ A , in a certain energy range where the minimum kinetic energy of the photoelectrons E K determined by Φ A is larger than zero but E K + Φ A < Φ S , no spectral weight is obtained in the electron analyzer. This is shown in Fig. 2 that an energy cutoff appears at VS , below which the measured electron density is zero. This is simply because those electrons cannot leave the sample surface in the photoemission process and thus cannot be detected by the analyzer. 2 Momentum Resolution of ARPES In the previous discussion, only energy conservation of the photoemission process was used.
Angle-Resolved Photoemission Spectroscopy on High-Temperature Superconductors: Studies of Bi2212 and Single-Layer FeSe Film Grown on SrTiO3 Substrate by Junfeng He