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

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number115109
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number11
DOIs
Publication statusPublished - 2012 Mar 13

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Bulk Fermi surface and momentum density in heavily doped La <sub>2-x</sub>Sr <sub>x</sub>CuO <sub>4</sub> using high-resolution Compton scattering and positron annihilation spectroscopies'. Together they form a unique fingerprint.

Cite this