Session H21: Superconductivity: Electronic Structure of BSCCO; ARPES and theory

8:00 AM–11:00 AM, Tuesday, February 28, 2012
Room: 254A

Sponsoring Unit: DCMP
Chair: Weiguo Yin, Brookhaven National Lab

Abstract ID: BAPS.2012.MAR.H21.8

Abstract: H21.00008 : Nodal Gap of Heavily Under-doped Bi2201 Revealed by VUV Laser ARPES

9:24 AM–9:36 AM

Preview Abstract MathJax On | Off   Abstract  

Authors:

  Yingying Peng
    (The Institute of Physics, Chinese Academy of Sciences)

  Jianqiao Meng
    (The Institute of Physics, Chinese Academy of Sciences)

  Changtian Chen
    (Technical Institute of Physics and Chemistry, Chinese Academy of Science)

  Zuyan Xu
    (Technical Institute of Physics and Chemistry, Chinese Academy of Science)

  Xingjiang Zhou
    (The Institute of Physics, Chinese Academy of Sciences)

We have carried out VUV laser-based angle-resolved photoemission (ARPES) on heavily under-doped $Bi_2(Sr_{2-x}La_x)CuO_{6+\delta}$ (abbreviated as La-Bi2201) samples with different dopings from antiferromagnetic insulators to superconductors. We find that, along the $(0,0)-(\pi,\pi)$ nodal direction, there is a gap opening that is strongly dependent on the hole doping level. The momentum and temperature dependence of the gap is investigated and the implication of the observations will be discussed.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.H21.8