Bulk Fermi surface and momentum density in heavily doped La 2-xSr xCuO 4 using high-resolution Compton scattering and positron annihilation spectroscopies

W. Al-Sawai, B. Barbiellini, Y. Sakurai, M. Itou, P. E. Mijnarends, R. S. Markiewicz, S. Kaprzyk, S. Wakimoto, M. Fujita, S. Basak, H. Lin, Yung Jui Wang, S. W.H. Eijt, H. Schut, K. Yamada, A. Bansil

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We have observed the bulk Fermi surface (FS) in an overdoped (x=0.3) single crystal of La 2-xSr xCuO 4 by using Compton scattering. A two-dimensional (2D) momentum density reconstruction from measured Compton profiles yields a clear FS signature in the third Brillouin zone along [100]. The quantitative agreement between density functional theory (DFT) calculations and momentum density experiment suggests that Fermi-liquid physics is restored in the overdoped regime. In particular the predicted FS topology is found to be in good accord with the corresponding experimental data. We find similar quantitative agreement between the measured 2D angular correlation of positron annihilation radiation (2D-ACAR) spectra and the DFT-based computations. However, 2D-ACAR does not give such a clear signature of the FS in the extended momentum space in either the theory or the experiment.

本文言語English
論文番号115109
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
85
11
DOI
出版ステータスPublished - 2012 3 13

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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