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Title: Unidirectional Diagonal Order and Three-Dimensional Stacking of Charge Stripes in Orthorhombic Pr1.67Sr0.33Ni)4 and Nd1.67Sr0.33NiO4

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930617
Report Number(s):
BNL-80937-2008-JA
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B: Condensed Matter and Materials Physics; Journal Volume: 74
Country of Publication:
United States
Language:
English
Subject:
national synchrotron light source

Citation Formats

Hucker,M., Zimmermann, V., Klingeler, R., Kiele, S., Geck, J., Bakehe, S., Zhang, J., Hill, J., Revcolevschi, A., and et al.. Unidirectional Diagonal Order and Three-Dimensional Stacking of Charge Stripes in Orthorhombic Pr1.67Sr0.33Ni)4 and Nd1.67Sr0.33NiO4. United States: N. p., 2006. Web. doi:10.1103/PhysRevB.74.085112.
Hucker,M., Zimmermann, V., Klingeler, R., Kiele, S., Geck, J., Bakehe, S., Zhang, J., Hill, J., Revcolevschi, A., & et al.. Unidirectional Diagonal Order and Three-Dimensional Stacking of Charge Stripes in Orthorhombic Pr1.67Sr0.33Ni)4 and Nd1.67Sr0.33NiO4. United States. doi:10.1103/PhysRevB.74.085112.
Hucker,M., Zimmermann, V., Klingeler, R., Kiele, S., Geck, J., Bakehe, S., Zhang, J., Hill, J., Revcolevschi, A., and et al.. Sun . "Unidirectional Diagonal Order and Three-Dimensional Stacking of Charge Stripes in Orthorhombic Pr1.67Sr0.33Ni)4 and Nd1.67Sr0.33NiO4". United States. doi:10.1103/PhysRevB.74.085112.
@article{osti_930617,
title = {Unidirectional Diagonal Order and Three-Dimensional Stacking of Charge Stripes in Orthorhombic Pr1.67Sr0.33Ni)4 and Nd1.67Sr0.33NiO4},
author = {Hucker,M. and Zimmermann, V. and Klingeler, R. and Kiele, S. and Geck, J. and Bakehe, S. and Zhang, J. and Hill, J. and Revcolevschi, A. and et al.},
abstractNote = {},
doi = {10.1103/PhysRevB.74.085112},
journal = {Physical Review B: Condensed Matter and Materials Physics},
number = ,
volume = 74,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}
  • The interplay between crystal symmetry and charge stripe order in Pr{sub 1.67}Sr{sub 0.33}NiO{sub 4} and Nd{sub 1.67}Sr{sub 0.33}NiO{sub 4} has been studied by means of single crystal x-ray diffraction. In contrast to tetragonal La{sub 1.67}Sr{sub 0.33}NiO{sub 4}, these crystals are orthorhombic. The corresponding distortion of the NiO{sub 2} planes is found to dictate the direction of the charge stripes, similar to the case of diagonal spin stripes in the insulating phase of La{sub 2-x}Sr{sub x}CuO{sub 4}. In particular, diagonal stripes seem to always run along the short a axis, which is the direction of the octahedral tilt axis. In contrast,more » no influence of the crystal symmetry on the charge stripe ordering temperature itself was observed, with T{sub CO}{approx}240 K for La, Pr, and Nd. The coupling between lattice and stripe degrees of freedom allows one to produce macroscopic samples with unidirectional stripe order. In samples with stoichiometric oxygen content and a hole concentration of exactly 1/3, charge stripes exhibit a staggered stacking order with a period of three NiO{sub 2} layers, previously only observed with electron microscopy in domains of mesoscopic dimensions. Remarkably, this stacking order starts to melt about 40 K below T{sub CO}. The melting process can be described by mixing the ground state, which has a three-layer stacking period, with an increasing volume fraction with a two-layer stacking period.« less
  • The interplay between crystal symmetry and charge stripe order in Pr{sub 1.67}Sr{sub 0.33}NiO{sub 4} and Nd{sub 1.67}Sr{sub 0.33}NiO{sub 4} has been studied by means of single crystal x-ray diffraction. In contrast to tetragonal La{sub 1.67}Sr{sub 0.33}NiO{sub 4}, these crystals are orthorhombic. The corresponding distortion of the NiO{sub 2} planes is found to dictate the direction of the charge stripes, similar to the case of diagonal spin stripes in the insulating phase of La{sub 2-x}Sr{sub x}CuO{sub 4}. In particular, diagonal stripes seem to always run along the short a axis, which is the direction of the octahedral tilt axis. In contrast,more » no influence of the crystal symmetry on the charge stripe ordering temperature itself was observed, with T{sub CO}{approx}240 K for La, Pr, and Nd. The coupling between lattice and stripe degrees of freedom allows one to produce macroscopic samples with unidirectional stripe order. In samples with stoichiometric oxygen content and a hole concentration of exactly 1/3, charge stripes exhibit a staggered stacking order with a period of three NiO{sub 2} layers, previously only observed with electron microscopy in domains of mesoscopic dimensions. Remarkably, this stacking order starts to melt about 40 K below T{sub CO}. The melting process can be described by mixing the ground state, which has a three-layer stacking period, with an increasing volume fraction with a two-layer stacking period.« less
  • Using a two-dimensional three-band Peierls-Hubbard model appropriate to layered transition-metal oxides, and in an inhomogeneous Hartree-Fock approximation, we show that several kinds of charge-localized mesoscopic patterns (stripes) may exist: vertical site stripes, vertical zig-zag stripes, diagonal site stripes, and oxygen-centered stripes. A random-phase-approximation analysis reveals new phonon modes and intense low-energy spin excitations in these stripes. A softened phonon mode with momentum ({pi},0) in the oxygen-centered stripe may explain the anomalous phonons observed by neutron-scattering experiments in several cuprate superconductors. {copyright} {ital 1998} {ital The American Physical Society}
  • Commensurability effects for nickelates have been studied, for the first time, by neutron scattering on La{sub 5/3}Sr {sub 1/3}NiO {sub 4} . Upon cooling, this system undergoes three successive phase transitions associated with quasi-two-dimensional (2D) commensurate charge and spin stripe ordering in the NiO{sub 2} planes. The two lower temperature phases are stripe lattice states with quasi-long-range in-plane charge correlation. When the lattice of 2D charge stripes melts, it goes through an intermediate glass state before becoming a disordered liquid state. This glass state shows short-range charge order without spin order, and may be called a {open_quotes}stripe glass{close_quotes} which resemblesmore » the hexatic/nematic state in 2D melting. {copyright} {ital 1997} {ital The American Physical Society}« less
  • Electrochemical oxidation of (triazatetrabenzoporphyrinato)nickel(II) or (triazatetrabenzoporphyrinato)copper(II), Ni(tatbp) or Cu(tatbp), dissolved in 1-chloronaphthalene in the presence of the perrhenate ion affords the new molecular conductors (Ni(tatbp)){sub 3}(ReO{sub 4}){sub 2}{center dot}C{sub 10}H{sub 7}Cl and (Cu(tatbp)){sub 3}(ReO{sub 4}){sub 2}{center dot}C{sup 10}H{sub 7}Cl. The isostructural compounds are composed of partially ligand-oxidized (+2/3) M(tatbp) molecules that form trimerized stacks. Trimerization of the conducting stacks renders the compounds semiconductors with conductivity along the needle axis (crystallographic a) in the range of 2.5 {times} 10{sup {minus}4}-3.0 {times} 10{sup {minus}4} {Omega}{sup {minus}1} cm{sup {minus}1} and an activation energy for conduction in the range of 0.24-0.26 eV. Magnetic susceptibilitymore » measurements on the Ni(II) derivative show that the valence band has the diamagnetic ground state expected for a semiconductor. Nonetheless, the valence-band electrons are shown to mediate a strong intratrimer Cu-Cu coupling characterized by a Weiss constant {Theta} = {minus}5.2 K in the Cu(II) analogue. The magnetic properties are rationalized in terms of a band structure derived by considering the trimers as weakly interacting supermolecules, with {Theta} dominated by intratrimer interactions. A structure determination was performed on the Cu(II) analogue.« less