Neutron-scattering study of stripe-phase order of holes and spins in La1.48Nd0.4Sr0.12CuO4.
Neutron-scattering study of stripe-phase order of holes and spins in La1.48Nd0.4Sr0.12CuO4.
复制标题
DOI：
10.1103/physrevb.54.7489
复制
发表时间：
1996-09
期刊：
影响因子：
--
通讯作者：
J. Tranquada;J. Axe;N. Ichikawa;Y. Nakamura;S. Uchida;B. Nachumi
中科院分区：
文献类型：
--
作者：
J. Tranquada;J. Axe;N. Ichikawa;Y. Nakamura;S. Uchida;B. Nachumi
We present a neutron diffraction study of charge and spin order within the CuO{sub 2} planes of La{sub 1.48}Nd{sub 0.4}Sr{sub 0.12}CuO{sub 4}, a crystal in which superconductivity is anomalously suppressed. At low temperatures we observe elastic magnetic superlattice peaks of the type (1/2{plus_minus}{epsilon},1/2,0) and charge-order peaks at (2{plus_minus}2{epsilon},0,0), where {epsilon}=0.118. After cooling the crystal through the low-temperature-orthorhombic (LTO) to low-temperature-tetragonal (LTT) phase transition near 70 K, the charge-order peaks appear first at {approximately}60 K, with the magnetic peaks appearing below 50 K. The magnetic peaks increase in intensity by an order of magnitude below 3 K due to ordering of the Nd ions. We show that the observed diffraction features are consistent with stripe-phase order, in which the dopant-induced holes collect in domain walls that separate antiferromagnetic antiphase domains. The {bold Q} dependence of the magnetic scattering indicates that the low-temperature correlation length within the planes is substantial ({approximately}170 A), but only very weak correlations exist between next-nearest-neighbor planes. Correlations between nearest-neighbor layers are frustrated by pinning of the charge stripes to the lattice distortions of the LTT phase. The spin-density-wave amplitude corresponds to a Cu moment of 0.10{plus_minus}0.03 {mu}{sub {ital B}}. The behavior of the electrical resistivity within themore » LTT phase is examined, and the significance of stripe-phase correlations for understanding the unusual transport properties of layered cuprates is discussed. {copyright} {ital 1996 The American Physical Society.}« less
We present a neutron diffraction study of charge and spin order within the CuO{sub 2} planes of La{sub 1.48}Nd{sub 0.4}Sr{sub 0.12}CuO{sub 4}, a crystal in which superconductivity is anomalously suppressed. At low temperatures we observe elastic magnetic superlattice peaks of the type (1/2{plus_minus}{epsilon},1/2,0) and charge-order peaks at (2{plus_minus}2{epsilon},0,0), where {epsilon}=0.118. After cooling the crystal through the low-temperature-orthorhombic (LTO) to low-temperature-tetragonal (LTT) phase transition near 70 K, the charge-order peaks appear first at {approximately}60 K, with the magnetic peaks appearing below 50 K. The magnetic peaks increase in intensity by an order of magnitude below 3 K due to ordering of the Nd ions. We show that the observed diffraction features are consistent with stripe-phase order, in which the dopant-induced holes collect in domain walls that separate antiferromagnetic antiphase domains. The {bold Q} dependence of the magnetic scattering indicates that the low-temperature correlation length within the planes is substantial ({approximately}170 A), but only very weak correlations exist between next-nearest-neighbor planes. Correlations between nearest-neighbor layers are frustrated by pinning of the charge stripes to the lattice distortions of the LTT phase. The spin-density-wave amplitude corresponds to a Cu moment of 0.10{plus_minus}0.03 {mu}{sub {ital B}}. The behavior of the electrical resistivity within themore » LTT phase is examined, and the significance of stripe-phase correlations for understanding the unusual transport properties of layered cuprates is discussed. {copyright} {ital 1996 The American Physical Society.}« less