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Direct Observation of k∥ and k⊥ Stripe Excitations in La2−x Sr x CuO4

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Abstract

The superconducting transition temperature in the cuprate is pointed to be enhanced by the self-organized spin-charge separated stripes. The magnetic excitations are very different in k∥ and k⊥ stripes. Therefore if one detects the different excitations, it is a clear evidence of the stripe. Neutron scattering, however, always observes the mixed excitations. We first succeeded to detect the k⊥ stripe excitations of the separated dispersion induced by the super-lattice structure of the stripe in distinction from the k∥ stripe excitations by two-magnon Raman scattering. The stripe structure is ubiquitous in the whole carrier density range at low temperatures.

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Author notes

  1. S. Sugai

    Present address: College of Arts and Sciences, The Petroleum Institute, P.O. Box 2533, Abu Dhabi, UAE

Authors and Affiliations

  1. Department of Physics, Arts and Science, Petroleum Institute, P.O. Box 2533, Abu Dhabi, UAE

    S. Sugai

  2. Department of Physics, Faculty of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan

    S. Sugai, Y. Tamai, Y. Takayanagi, N. Hayamizu & T. Muroi

  3. TRIP, Japan Science and Technology Agency (JST), Chiyoda, Tokyo, 102-0075, Japan

    S. Sugai

Authors
  1. S. Sugai
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  2. Y. Tamai
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  3. Y. Takayanagi
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  4. N. Hayamizu
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  5. T. Muroi
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Correspondence to S. Sugai.

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Sugai, S., Tamai, Y., Takayanagi, Y. et al. Direct Observation of k∥ and k⊥ Stripe Excitations in La2−x Sr x CuO4 . J Supercond Nov Magn 25, 1393–1397 (2012). https://doi.org/10.1007/s10948-012-1528-y

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  • DOI: https://doi.org/10.1007/s10948-012-1528-y

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