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Systematic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>63</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:math>NQR study of the stripe phase in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>1.6</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>0.4</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>0.07</mml:mn><mml:mo><~</mml:mo><mml:mi>x</mml:mi><mml:mo><~</mml:mo><mml:mn>0.25</mml:mn></mml:math>

Philip M. SingerDepartment of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139A. W. HuntDepartment of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139Agneta F. CederströmDepartment of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139Takashi ImaiDepartment of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

1999lv

ABI

Annotatsiya

We demonstrate that the integrated intensity of ${}^{63}\mathrm{Cu}$ nuclear quadrupole resonance (NQR) in ${\mathrm{La}}_{1.6\ensuremath{-}x}{\mathrm{Nd}}_{0.4}{\mathrm{Sr}}_{x}{\mathrm{CuO}}_{4}$ decreases dramatically below the charge-stripe ordering temperature ${T}_{\mathrm{charge}}.$ Comparison with neutron and x-ray scattering indicates that the wipeout fraction $F(T)$ (i.e., the missing fraction of the integrated intensity of the NQR signal) represents the charge-stripe order parameter. The systematic study reveals bulk charge-stripe order throughout the superconducting region $0.07<~x<~0.25.$ As a function of the reduced temperature $t\ensuremath{\equiv}{T/T}_{\mathrm{charge}},$ the temperature dependence of $F(t)$ is sharpest for the hole concentration $x\ensuremath{\sim}1/8,$ indicating that $x\ensuremath{\sim}1/8$ is the optimum concentration for stripe formation.

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Identifikatorlar

DOI: 10.1103/physrevb.60.15345

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