Bulk Fermi surface and momentum density in heavily doped La2?xSrxCuO4 using high-resolution Compton scattering and positron annihilation spectroscopies

Bulk Fermi surface and momentum density in heavily doped La2?xSrxCuO4 using high-resolution Compton scattering and positron annihilation spectroscopies

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

Applied Sciences

RRR/Radiation, Radionuclides and Reactors

2012-03-13

We have observed the bulk Fermi surface (FS) in an overdoped (x=0.3) single crystal of La2?xSrxCuO4 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.

http://resolver.tudelft.nl/uuid:3f902f4d-efab-4f0d-bb40-fc1252c660ca

https://doi.org/10.1103/PhysRevB.85.115109

American Physical Society

1098-0121

http://link.aps.org/doi/10.1103/PhysRevB.85.115109

Physical Review B, 85 (11), 2012

Institutional Repository

journal article

© 2012 The Author(s)
American Physical Society