Imaging doped holes in a cuprate superconductor with high-resolution compton scattering

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

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

The high-temperature superconducting cuprate La2-xSr xCuO4 (LSCO) shows several phases ranging from antiferromagnetic insulator to metal with increasing hole doping. To understand how the nature of the hole state evolves with doping, we have carried out high-resolution Compton scattering measurements at room temperature together with first-principles electronic structure computations on a series of LSCO single crystals in which the hole doping level varies from the underdoped (UD) to the overdoped (OD) regime. Holes in the UD system are found to primarily populate the O 2px/py orbitals. In contrast, the character of holes in the OD system is very different in that these holes mostly enter Cu d orbitals. High-resolution Compton scattering provides a bulk-sensitive method for imaging the orbital character of dopants in complex materials.

Original languageEnglish
Pages (from-to)698-702
Number of pages5
JournalScience
Volume332
Issue number6030
DOIs
Publication statusPublished - 2011 May 6

ASJC Scopus subject areas

  • General

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