Experimental investigation of the electronic structure of Ca$_{0.83}$La$_{0.17}$Fe$_2$As$_2$

Y. -B. Huang; P. Richard; J. -H. Wang; X. -P. Wang; X. Shi; N. Xu; Z. Wu; A. Li; J. -X. Yin; T. Qian; B. Lv; C. W. Chu; S. H. Pan; M. Shi; H. Ding

doi:10.1088/0256-307X/30/1/017402

paper

Experimental investigation of the electronic structure of Ca $_{0.83}$ La $_{0.17}$ Fe $_{2}$ As $_{2}$

arXiv:1210.7288 · doi:10.1088/0256-307X/30/1/017402

Abstract

We performed a combined angle-resolved photoemission spectroscopy and scanning tunneling microscopy study of the electronic structure of electron-doped Ca $_{0.83}$ La $_{0.17}$ Fe $_{2}$ As $_{2}$ . A surface reconstruction associated with the dimerization of As atoms is observed directly in the real space, as well as the consequent band folding in the momentum space. Besides this band folding effect, the Fermi surface topology of this material is similar to that reported previously for BaFe $_{1.85}$ Co $_{0.15}$ As $_{2}$ , with $Γ$ -centred hole pockets quasi-nested to M-centred electron pockets by the antiferromagnetic wave vector. Although no superconducting gap is observed by ARPES possibly due to low superconducting volume fraction, a gap-like density of states depression of $7.7 \pm 2.9$ meV is determined by scanning tunneling microscopy.

4 pages, 3 figures

Experimental investigation of the electronic structure of Ca $_{0.83}$ La $_{0.17}$ Fe $_{2}$ As $_{2}$

Abstract

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Experimental investigation of the electronic structure of Ca0.83​La0.17​Fe2​As2​

Abstract

References in corpus (6)

Cited by in corpus (2)

Experimental investigation of the electronic structure of Ca $_{0.83}$ La $_{0.17}$ Fe $_{2}$ As $_{2}$