In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa$_2$Cu$_3$O$_{6+x}$

V. Hinkov; P. Bourges; S. Pailhes; Y. Sidis; A. Ivanov; C. T. Lin; D. P. Chen; B. Keimer

doi:10.1038/nphys720

paper

In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

arXiv:cond-mat/0601048 · doi:10.1038/nphys720

Abstract

A detailed inelastic neutron scattering study of the in-plane anisotropy of magnetic excitations in twin-free YBa $_{2}$ Cu $_{3}$ O $_{6.6}$ ( $T_{c} =$ 61 K) reveals that the spin excitation spectra in the superconducting and normal states are qualitatively different. Below $T_{c}$ , the spectrum consists of upward- and downward-dispersing branches with modest in-plane anisotropy merging at an energy $E_{r es} =$ 37.5 meV. In the normal state, the singularity at $E_{r es}$ disappears, and the spectrum exhibits a steep dispersion with a strongly anisotropic in-plane geometry. These data have important implications for models based on static or dynamic "stripe" order of spins and charges.

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In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

Abstract

References in corpus (7)

Cited by in corpus (154)

In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa2​Cu3​O6+x​

Abstract

References in corpus (7)

Cited by in corpus (154)

In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$