Incommensurate lattice distortion in the high temperature tetragonal phase of La${}_{2-x}$(Sr,Ba)${}_x$CuO${}_4$

Abstract

We report incommensurate diffuse (ICD) scattering appearing in the high-temperature-tetragonal (HTT) phase of La${}_{2-x}$(Sr,Ba)${}_x$CuO${}_4$ with $0.07\le x\le 0.20$ observed by the neutron diffraction technique. For all compositions, a sharp superlattice peak of the low-temperature-orthorhombic (LTO) structure is replaced by a pair of ICD peaks with the modulation vector parallel to the CuO${}_6$ octahedral tilting direction, that is, the diagonal Cu-Cu direction of the CuO${}_2$ plane, above the LTO-HTT transition temperature $T_s$. The temperature dependences of the incommensurability $\delta$ for all samples scale approximately as $T/T_s$, while those of the integrated intensity of the ICD peaks scale as $(T-T_s{)}^{-1}$. These observations together with absence of ICD peaks in the non-superconducting $x=0.05$ sample evince a universal incommensurate lattice instability of hole-doped 214 cuprates in the superconducting regime.

arXiv comment6 pages, 6 figures

References in corpus (7)

• Spin-Gap Proximity Effect Mechanism of High Temperature Superconductivity
• Stripe order, depinning, and fluctuations in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$ and La${}_{1.875}$Ba${}_{0.075}$Sr${}_{0.050}$CuO${}_4$
• Neutron Scattering Study of Spin Density Wave Order in the Superconducting State of Excess-Oxygen-Doped La2CuO4+y
• Direct relation between the low-energy spin excitations and superconductivity of overdoped high-$T_c$ superconductors
• Incommensurate Geometry of the Elastic Magnetic Peaks in Superconducting La1.88Sr0.12CuO4
• Structural instability associated with the tilting of CuO6 octahedra in La2-xSrxCuO4
• Neutron scattering study of soft phonons and diffuse scattering in insulating La${}_{1.95}$Sr${}_{0.05}$CuO${}_4$

Cited by in corpus (18)

• Stripe order in superconducting La(2-x)Ba(x)CuO(4) for 0.095 <= x <= 0.155
• Tuning competing orders in La2-xSrxCuO4 cuprate superconductors by the application of an external magnetic field
• Rotated stripe order and its competition with superconductivity in La${}_{1.88}$Sr${}_{0.12}$CuO${}_4$
• Hidden magnetism at the pseudogap critical point of a high temperature superconductor
• Spontaneous symmetry breaking by charge stripes in the high-pressure phase of superconducting La(1.875)Ba(0.125)CuO(4)
• Resistivity phase diagram of cuprates revisited
• Reconciliation of local and long range tilt correlations in underdoped La2-xBaxCuO4
• Uniaxial Pressure Induced Stripe Order Rotation in La${}_{1.88}$Sr${}_{0.12}$CuO${}_4$
• Unconventional short-range structural fluctuations in cuprate high-$T_c$ superconductors
• Doping dependence of the $(\pi ,\pi )$ shadow band in La-based cuprates studied by angle-resolved photoemission spectroscopy
• Magnetic field induced anisotropy of ${}^{139}\mathrm{La}$ spin-lattice relaxation rates in stripe ordered ${\mathrm{La}}_{1.875}{\mathrm{Ba}}_{0.125}{\mathrm{CuO}}_4$
• Diffuse Scattering from Correlated Electron Systems
• Structural phase diagram of LaO1-xFxBiSSe: suppression of the structural phase transition by partial F substitutions
• ${}^{139}$La NMR investigation in underdoped La${}_{1.93}$Sr${}_{0.07}$CuO${}_4$
• Structural transitions in a doped lanthanum cuprate
• Staging superstructures in high-$T_c$ Sr/O co-doped La${}_{2-x}$Sr${}_x$CuO${}_{4+y}$
• Nanoscale structural correlations in a model cuprate superconductor
• Superconductivity in Quantum Complex Matter: the Superstripes Landscape