Hidden Itinerant-Spin Phase in Heavily Overdoped La2xSrxCuO4 Superconductors Revealed by Dilute Fe Doping: A Combined Neutron Scattering and Angle-Resolved Photoemission Study

Rui-Hua He, M. Fujita, M. Enoki, M. Hashimoto, S. Iikubo, S.-K. Mo, Hong Yao, T. Adachi, Y. Koike, Z. Hussain, Z.-X. Shen, and K. Yamada
Phys. Rev. Lett. 107, 127002 – Published 14 September 2011

Abstract

We demonstrated experimentally a direct way to probe a hidden propensity to the formation of a spin-density wave in a nonmagnetic metal with strong Fermi surface nesting. Substituting Fe for a tiny amount of Cu (1%) induced an incommensurate magnetic order below 20 K in heavily overdoped La2xSrxCuO4. Elastic neutron scattering suggested that this order cannot be ascribed to the localized spins on Cu or doped Fe. Angle-resolved photoemission revealed a strong Fermi surface nesting inherent in the pristine La2xSrxCuO4 that likely drives this order. Our finding presents the first example of the long-sought “itinerant-spin extreme” of cuprates, where the spins of itinerant doped holes define the magnetic ordering ground state; it complements the current picture of cuprate spin physics that highlights the predominant role of localized spins at lower dopings.

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  • Received 28 July 2010

DOI:https://doi.org/10.1103/PhysRevLett.107.127002

© 2011 American Physical Society

Authors & Affiliations

Rui-Hua He1,2,3, M. Fujita4,*, M. Enoki5, M. Hashimoto1,2,3, S. Iikubo4, S.-K. Mo1,2,3, Hong Yao1, T. Adachi5, Y. Koike5, Z. Hussain3, Z.-X. Shen1,2, and K. Yamada4

  • 1Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
  • 2Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
  • 3Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 4Advanced Institute for Materials Research and Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 5Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan

  • *fujita@imr.tohoku.ac.jp

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Vol. 107, Iss. 12 — 16 September 2011

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