Condensed-Matter Physics & Materials Science Seminar

"Laser ARPES on High-Temperature Superconductors"

Presented by Xingjiang Zhou, National Lab for Superconductivity, Institute of Physics, Chinese Academy of Sciences, China

Monday, March 5, 2012, 2:00 pm — Small Seminar Room, Bldg. 510

The utilization of the Vacuum Ultraviolet (VUV) laser as a light source has elevated the angle-resolved photoemission (ARPES) technique to a new level. Its unique advantages, such as super-high energy resolution (better than 1 meV), high momentum resolution, super-high photon flux and enhanced bulk sensitivity have made it possible to do some critical experiments that are not doable before. In this talk, I will first report some latest progress of laser-based photoemission techniques, including the development of VUV-laser-based spin-resolved ARPES. Then I will highlight some examples on using laser-ARPES to probe the many-body effects, superconducting gap and pseudogap, Fermi arc and Fermi pocket, and the pairing mechanism in high temperature superconductors.

References:
[1]. G. D. Liu et al., Review of Scientific Instruments 79 (2008) 023105.
[2]. W. T. Zhang et al., Phys. Rev. Lett. 100 (2008) 107002.
[3]. W. T. Zhang et al., Phys. Rev. Lett. 101 (2008) 017002.
[4]. J. Q. Meng et al., Phys. Rev. B . 79 (2009) 024514.
[5]. J. Q. Meng et al., Nature 462 (2009) 335.
[6]. L. Zhao et al., Phys. Rev. B. 83, 184515 (2011).
[7]. W. T. Zhang et al., arXiv: 1103.3629.

Hosted by: Genda Gu

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