Angle-Resolved Photoemission Spectroscopy on by Junfeng He

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By Junfeng He

This publication typically makes a speciality of the research 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 proof 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 examine on single-layer FeSe/STO movies has supplied key insights into the digital foundation of superconductivity during this method. A section diagram and digital indication of excessive Tc and insulator to superconductor crossover were tested within the single-layer FeSe/STO motion pictures. Readers will locate crucial info at the strategies used and engaging actual phenomena saw by way of 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 (Springer Theses)

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1 mm. 1 mm. 8◦ for the 30◦ angular mode. 8◦ for the 30◦ angular mode. As Fig. 9 Angle resolution test of the VUV laser ARPES system. The measurements were taken with pass energy of 1 eV (a), 2 eV (b), and 5 eV (c), respectively. d, the Scienta wire-and-slit device.

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On the one hand, if the flux is too low, the statistics of the data will be affected. On the other hand, if the flux is too high, especially for the pulsed light, the so-called space charge effect will appear which is not good for the measurement. This will be elaborated later in this chapter. Besides the light source, another key constituent for the ARPES system is the vacuum. The ARPES measurement is based on the detection of intrinsic angle and energy of the photoelectrons. Therefore, the scattering of the photoelectrons by the atoms in the air should be avoided before the detection, and thus, a measurement in vacuum is needed.

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