Substitution for Cu in the electron-doped infinite-layer superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.9</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>0.1</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CuO</mml:mi></mml:m

Jung, C. U.; Kim, J. Y.; Park, Min-Seok; Kim, Mun-Seog; Kim, Heon‐Jung; Lee, S. Y.; Lee, Sung‐Ik

doi:10.1103/physrevb.65.172501

Cited by 33 publications

(5 citation statements)

References 46 publications

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“…Our deduction of s-wave behaviour is consistent with previously observed behaviour upon doping SLCO with impurities [3,30]. It is a well-known result that doping exclusively d-wave superconductors with a small concentration of nonmagnetic impurities results in a strong suppression of T c .…”

Section: Resultssupporting

confidence: 92%

Finite gap behaviour in the superconductivity of the ‘infinite layer’ n-doped high-T_csuperconductor Sr_0.9La_0.1CuO₂

White¹,

Forgan²,

Laver³

et al. 2008

J. Phys.: Condens. Matter

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We report on the first small-angle neutron scattering measurements from the flux line lattice (FLL) in the high-Tc cuprate superconductor Sr0.9La0.1CuO2. Using a polycrystalline sample, the scattered intensity decreases monotonically with scattering angle away from the undiffracted beam, independently of the azimuthal angle around the beam. The absence of clear peaks in the intensity suggests the establishment of a highly disordered FLL within the grains. We find that the intensity distribution may be represented by the form factor for a single flux line in the London approximation, with some contribution from crystal anisotropy. Most interestingly however, we find that, over the observed field range, the temperature dependence of the diffracted intensity is best represented by s-wave pairing, with lower limits of the gap values being very similar to the Bardeen–Cooper–Schrieffer value of Δ(0) = 1.76 kBTc. However, a qualitative consideration of corrections to the observed intensity suggests that these gap values are likely to be higher, implying strong-coupling behaviour.

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Section: Resultssupporting

confidence: 92%

Finite gap behaviour in the superconductivity of the ‘infinite layer’ n-doped high-T_csuperconductor Sr_0.9La_0.1CuO₂

White¹,

Forgan²,

Laver³

et al. 2008

J. Phys.: Condens. Matter

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show abstract

“…The effects of magnetic and non-magnetic impurities on the normal-state and superconducting-state properties are also significantly different in the electron-doped HTSCs when compared with the hole-doped HTSCs. For example, Zn initially reduces the superconducting transition temperature, T c , by ∼10 K/% (Zn in the CuO 2 plane) for hole-doped HTSCs near optimal doping [30][31][32][33], while the initial suppression rate is much smaller in the electron-doped HTSCs where it is ∼1 K/% (Zn in the CuO 2 plane) [34]. Ni has the opposite effect on T c , where T c is initially reduced by ∼20 K/% (Ni in the CuO 2 plane) in the electron-doped HTSCs [34][35][36][37] but it is only initially reduced by up to 4 K/% (Ni in the CuO 2 plane) in the hole-doped HTSC, YBa 2 Cu 3 O 7−d [38] and 12 K/% (Ni in the CuO 2 plane) in the hole-doped HTSC, YBa 2 Cu 4 O 8 [30,[39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

⁶³Cu nuclear magnetic resonance study of Pr_1.85Ce_0.15Cu_{1 −x}Ni_xO₄: Ni-induced spin density oscillation and modification of the low energy spin fluctuations

Williams¹,

Jurkutat²,

Rybicki³

et al. 2011

J. Phys.: Condens. Matter

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We report the results from a (63)Cu nuclear magnetic resonance (NMR) study of the electron-doped high temperature superconducting cuprate (HTSC) Pr(1.85)Ce(0.15)Cu(1-x)Ni(x)O(4). We find that Ni induces a magnetic broadening of the (63)Cu NMR spectra that can be interpreted in terms of an induced spin density oscillation about the Ni site, similar to that reported from (63)Cu NMR measurements on the hole-doped HTSCs when Zn is partially substituted for Cu. There is also an additional temperature-dependent contribution to the (63)Cu spin-lattice relaxation rate that can be interpreted in terms of an Ni-induced modification of the low energy spin fluctuations. Furthermore, the spin fluctuations are intrinsically spatially inhomogeneous and additional inhomogeneities are induced by Ni.

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“…Also the high vapor pressure of As can cause the loss of the element during the growth and raises safety concerns. Thus, we adopted a high pressure synthesis technique that has been routinely used by us for the crystal growth of MgB 2 , Sr 1−x La x CuO 2 , and MgCNi 3 [26][27][28]. And, we targeted the compound of fluorine-free REFeAsO 1−x F x for the following reasons.…”

Section: Introductionmentioning

confidence: 99%

High-pressure growth of fluorine-free SmFeAsO_1−xsuperconducting single crystals

Lee

Park

Lee

et al. 2009

Supercond. Sci. Technol.

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Superconducting single crystals of SmFeAsO 1-x without fluorine doping were grown at a pressure of 3.3 GPa and a temperature of 1350-1450 °C by using the selfflux method. Plate-like single crystals of a few-150 μm in their lateral size were obtained. Single crystals showed the superconducting transition at about 53.5 K with a narrow transition width of 0.5 K. The synchrotron-irradiated x-ray diffractometry patterns and high-angle-annular-dark-field scanning transmission electron microscopy images point to the high quality of the crystals with a well-defined layered tetragonal structure. The chemical compositions of the crystals were estimated by using the electron-probe x-ray microanalysis.

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Substitution for Cu in the electron-doped infinite-layer superconductorSr0.9La0.1CuO

Cited by 33 publications

References 46 publications

Finite gap behaviour in the superconductivity of the ‘infinite layer’ n-doped high-T_csuperconductor Sr_0.9La_0.1CuO₂

Finite gap behaviour in the superconductivity of the ‘infinite layer’ n-doped high-T_csuperconductor Sr_0.9La_0.1CuO₂

⁶³Cu nuclear magnetic resonance study of Pr_1.85Ce_0.15Cu_{1 −x}Ni_xO₄: Ni-induced spin density oscillation and modification of the low energy spin fluctuations

High-pressure growth of fluorine-free SmFeAsO_1−xsuperconducting single crystals

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Substitution for Cu in the electron-doped infinite-layer superconductorSr0.9La0.1CuO

Cited by 33 publications

References 46 publications

Finite gap behaviour in the superconductivity of the ‘infinite layer’ n-doped high-Tcsuperconductor Sr0.9La0.1CuO2

Finite gap behaviour in the superconductivity of the ‘infinite layer’ n-doped high-Tcsuperconductor Sr0.9La0.1CuO2

63Cu nuclear magnetic resonance study of Pr1.85Ce0.15Cu1 −xNixO4: Ni-induced spin density oscillation and modification of the low energy spin fluctuations

High-pressure growth of fluorine-free SmFeAsO1−xsuperconducting single crystals

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Product

Resources

About

Finite gap behaviour in the superconductivity of the ‘infinite layer’ n-doped high-T_csuperconductor Sr_0.9La_0.1CuO₂

Finite gap behaviour in the superconductivity of the ‘infinite layer’ n-doped high-T_csuperconductor Sr_0.9La_0.1CuO₂

⁶³Cu nuclear magnetic resonance study of Pr_1.85Ce_0.15Cu_{1 −x}Ni_xO₄: Ni-induced spin density oscillation and modification of the low energy spin fluctuations

High-pressure growth of fluorine-free SmFeAsO_1−xsuperconducting single crystals