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Magnetic dispersion of the diagonal incommensurate phase in lightly-doped La$$_{2-x}$$Sr$$_x$$CuO$$_4$$

Matsuda, Masaaki; Fujita, Masaki*; Wakimoto, Shuichi  ; Fernandez-Baca, J. A.*; Tranquada, J. M.*; Yamada, Kazuyoshi*

We performed inelastic neutron scattering experiments on almost single-domain crystals of lightly-doped La$$_{2-x}$$Sr$$_x$$CuO$$_4$$ ($$x$$=0.021 and 0.04). Despite the rotated incommensurability, we find that the spectrum in this insulating phase with a diagonal incommensurate spin modulation is consistent with the hour-glass dispersion observed in superconducting La$$_{2-x}$$Sr$$_x$$CuO$$_4$$ and YBa$$_2$$Cu$$_3$$O$$_{6+x}$$, where the spin modulation is bond parallel. In particular, we find that the energy at which the excitations cross the commensurate antiferromagnetic wave vector increases roughly linearly with doping through the underdoped regime.

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English

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Meeting title

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9th International Conference on Materials and Mechanisms of Superconductivity (M$$^{2}$$S-IX)

Held date

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2009/09

Location (city)

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Tokyo

Location (country)

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Japan

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Keywords

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no keyword

Research Facility

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JRR-3M(研究炉3)  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

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