High-pressure synthesis, crystal growth, phase diagrams, structural and magnetic properties of Y2Ba4CunO2n+x, HgBa2Can-1CunO2n+2+deltaand quasi-one-dimensional cuprates

Karpiński, J.; Meijer, G. I.; Schwer, H.; Molinski, R.; Kopnin, E.M.; Conder, K.; Angst, Manuel; Jun, J.; Казаков, С. М.; Wiśniewski, A.; Puźniak, R.; Hofer, J.; Alyoshin, V. A.; Sin, A.

doi:10.1088/0953-2048/12/9/201

Cited by 51 publications

(28 citation statements)

References 107 publications

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“…Figure 2a shows the (0<h<5, 0<k<4) portion of reciprocal space, where there is strong evidence of diffuse streaks running along the a* and b* directions and crossing all the Bragg peaks. Our high energy XRD data confirm the formation of O i stripes intercalated between the CuO 2 planes, both in the (100) and (010) directions 26 . The spatial distribution of the intensity of the streaks was obtained by SµXRD (see Methods).…”

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confidence: 70%

“…Here we report micro X-ray diffraction imaging of the spatial distribution of both the charge-density-wave 'puddles' (domains with only a few wavelengths) and quenched disorder in HgBa 2 CuO 4+y , the single layer cuprate with the highest T c , 95 kelvin [26][27][28] . We found that the charge-density-wave puddles, like the steam bubbles in boiling water, have a fat-tailed size distribution that is typical of selforganization near a critical point 19 .…”

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confidence: 99%

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Inhomogeneity of charge-density-wave order and quenched disorder in a high-Tc superconductor

Campi

Bianconi

Poccia

et al. 2015

Nature

291

309

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It has recently been established that the high temperature (high-Tc(between atomic and macroscopic scale). Here we report micro X-ray diffraction imaging of the spatial distribution of both the charge-density-wave 'puddles' (domains with only a few wavelengths) and quenched disorder in HgBa 2 CuO 4+y , the single layer cuprate with the highest T c , 95 kelvin [26][27][28] . We found that the charge-density-wave puddles, like the steam bubbles in boiling water, have a fat-tailed size distribution that is typical of selforganization near a critical point 19 . However, the quenched disorder, which arises from oxygen interstitials, has a distribution that is contrary to the usual assumed random, uncorrelated distribution 12, 13 . The interstitials-oxygen-rich domains are spatially anticorrelated with the charge-density-wave domains, leading to a complex emergent geometry of the spatial landscape for superconductivity. 2Although it is known that the incommensurate charge-density-wave (CDW) order in cuprates (copper oxides) is made of ordered, stripy, nanoscale puddles with an average of only 3-4 oscillations, information about the size distribution and spatial organization of these puddles has so far not been available. We present experiments that demonstrate that CDW puddles, have a complex spatial distribution and coexist with, but are spatially anticorrelated to, quenched disorder in HgBa 2 CuO 4+y (Hg1201). The sample we studied is a layered perovskite at optimum doping with oxygen interstitials y=0.12, tetragonal symmetry P4/mmm and a low misfit strain [14][15][16] . The X-ray diffraction (XRD) measurements (see Methods) show diffuse CDW satellites (secondary peaks surrounding a main peak) at q CDW =(0.23a*, 0.16c*), in the b*=0 plane and q CDW =(0.23b*, 0.16c*) in the a*=0 plane (where a*, b*, and c* are the reciprocal lattice units) around specific Bragg peaks, such as (1 0 8), below the onset temperature T CDW =240 K (see Fig. 1a). The component of the momentum transfer q CDW in the CuO 2 plane (0.23a*) in this case is smaller than it is in the underdoped case (0.28a*) 5 . The temperature evolution of CDW-peak profile along a* (in the h direction; Fig. 1b) shows a smeared, glassy-like evolution below T CDW .The CDW-peak intensity reaches a maximum at T=100 K, followed by a drop associated with the onset of superconductivity at T=T c . We investigated the isotropic character of the CDW, in the a-b plane using azimuthal scans, as shown in Fig. 1c. We observed an equal probability of vertical and horizontally striped CDW puddles.Our main result is the discovery of the statistical spatial distribution of the CDW-puddle size and density throughout the sample, which shows an emergent complex network geometry for the superconducting phase. We performed scanning micro X-ray diffraction (SµXRD) measurements (see Methods) to extend the imaging of spatial inhomogeneity previously obtained by scanning tunneling microscopy [7][8][9] , from the surface to the bulk of the sample and from nanoscale to mesoscale spatial inh...

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confidence: 70%

mentioning

confidence: 99%

Inhomogeneity of charge-density-wave order and quenched disorder in a high-Tc superconductor

Campi

Bianconi

Poccia

et al. 2015

Nature

291

309

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“…Details of the sample preparation for YBa 2 Cu 4 O 8 can be found elsewhere [16]. All crystals used in the present study were taken from one batch.…”

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confidence: 99%

s-Wave Symmetry Along the c-Axis and s+d In-plane Superconductivity in Bulk YBa2Cu4O8

Khasanov

Shengelaya

Karpiński

et al. 2007

J Supercond Nov Magn

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To clarify the order parameter symmetry of cuprates, the magnetic penetration depth λ was measured along the crystallographic directions a, b, and c in single crystals of YBa 2 Cu 4 O 8 via muon spin rotation. This method is direct, bulk sensitive, and unambiguous. The temperature dependences of λ −2 a and λ −2 b exhibit an inflection point at low temperatures as is typical for two-gap superconductivity (TGS) with s + d-wave character in the planes. Perpendicular to the planes a pure s-wave gap is observed thereby highlighting the important role of c-axis effects. We conclude that these are generic and universal features in the bulk of cuprates. Recently, new muon spin rotation (μSR) investigations of single crystal La 1.83 Sr 0.17 CuO 4 detected an inflection point in the temperature dependence of the inverse-squared in-plane magnetic penetration depth λ −2 ab , which is a direct consequence of two superconducting gaps with largely different zero temperature gap values [14]. Since it is unclear whether these observations are a material specific property or generic and intrinsic to HTS, the previous μSR studies were extended to single crystal YBa 2 Cu 4 O 8 and were performed by applying a magnetic field along the crystallographic directions a, b, and c. Thereby we obtain the three principle components of the second moments of the local magnetic field distribution P (B) in the mixed state, which are related to the superfluid density, and reflect directly the corresponding penetration depths λ a , λ b , and λ c . While λ −2 a and λ −2 b vary almost linearly with temperature for 20 < T < 50 K, as is expected for a d-wave order parameter, the c-axis response (λ −2 c ) saturates below 30 K, as expected for a s-wave order parameter. In addition, λ −2 a and PACS

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“…The YBa 2 Cu 4 O 8 single crystal investigated in this work was fabricated by a highpressure synthesis method described in detail elsewhere [7,8]. The volume of the nearly rectangular shaped sample is estimated to be 3.9 · 10 −4 cm 3 .…”

Section: Experiments and Analysismentioning

confidence: 99%

3D-xycritical properties of YBa₂Cu₄O₈and magnetic-field-induced 3D to 1D crossover

Schneider¹,

Bukowski²,

Karpiński³

et al. 2008

J. Phys.: Condens. Matter

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Abstract. We present reversible magnetization data of a YBa 2 Cu 4 O 8 single crystal and analyze the evidence for 3D-xy critical behavior and a magnetic field induced 3D to 1D crossover. Remarkable consistency with these phenomena is observed in agreement with a magnetic field induced finite size effect, whereupon the correlation length transverse to the applied magnetic field cannot grow beyond the limiting magnetic length scale L H = (Φ 0 / (aH)) 1/2 . By applying the appropriate scaling form we obtain the zero-field critical temperature, the 3D to 1D crossover, the vortex melting line and the universal ratios of the related scaling variables. Accordingly there is no continuous phase transition in the (H, T )-plane along the H c2 -lines as predicted by the mean-field treatment.

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High-pressure synthesis, crystal growth, phase diagrams, structural and magnetic properties of Y₂Ba₄Cu_nO_2n+x, HgBa₂Ca_n-1Cu_nO_2n+2+deltaand quasi-one-dimensional cuprates

Cited by 51 publications

References 107 publications

Inhomogeneity of charge-density-wave order and quenched disorder in a high-Tc superconductor

Inhomogeneity of charge-density-wave order and quenched disorder in a high-Tc superconductor

s-Wave Symmetry Along the c-Axis and s+d In-plane Superconductivity in Bulk YBa2Cu4O8

3D-xycritical properties of YBa₂Cu₄O₈and magnetic-field-induced 3D to 1D crossover

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High-pressure synthesis, crystal growth, phase diagrams, structural and magnetic properties of Y2Ba4CunO2n+x, HgBa2Can-1CunO2n+2+deltaand quasi-one-dimensional cuprates

Cited by 51 publications

References 107 publications

Inhomogeneity of charge-density-wave order and quenched disorder in a high-Tc superconductor

Inhomogeneity of charge-density-wave order and quenched disorder in a high-Tc superconductor

s-Wave Symmetry Along the c-Axis and s+d In-plane Superconductivity in Bulk YBa2Cu4O8

3D-xycritical properties of YBa2Cu4O8and magnetic-field-induced 3D to 1D crossover

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Product

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High-pressure synthesis, crystal growth, phase diagrams, structural and magnetic properties of Y₂Ba₄Cu_nO_2n+x, HgBa₂Ca_n-1Cu_nO_2n+2+deltaand quasi-one-dimensional cuprates

3D-xycritical properties of YBa₂Cu₄O₈and magnetic-field-induced 3D to 1D crossover