Spin dynamics and ordering of a cuprate stripe antiferromagnet

Article

关键词: HEISENBERG-ANTIFERROMAGNET;    NUCLEAR-QUADRUPOLE;    LA-139 NQR;    CU-63 NQR;    PHASE;    SUPERCONDUCTIVITY;    TRANSITION;    RELAXATION;    RESONANCE;   

DOI  :  10.1103/PhysRevB.63.020507

来源: SCIE

【 摘 要 】

In La1.48Nd0.4Sr0.12CuO4 the La-139 and Cu-63 nuclear quadrupole resonance relaxation rates and signal wipeout upon lowering temperature are shown to be due to purely magnetic fluctuations. They follow the same renormalized classical behavior as seen in neutron data. when the electronic spins order in stripes, with a small spread in spin stiffness (15% spread in activation energy). The La signal, which reappears at low temperatures, is magnetically broadened and experiences additional wipe out due to slowing down of the Nd fluctuations.

【 授权许可】

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