Ineluctable Complexity of High Temperature Superconductivity Elucidated

Phillips, J. C.

doi:10.1007/s10948-013-2308-z

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…An essential step towards the understanding of modern materials and their implementation in novel nano-electronic devices is the control and manipulation of their microscopic behavior [1][2][3]. Recently, the interrelationship between spin, charge, and lattice orders in high temperature superconductors (HTS) is at the center of a very animated discussion [4][5][6][7][8][9][10][11][12][13][14][15]. Novel results obtained in YBa 2 Cu 3 O 6+y (YBCO), provide compelling evidence for the charge density waves (CDW), and static magnetic stripes are intertwined and aggregated in nanoscale puddles [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Networks of superconducting nano-puddles in 1/8 doped YBa₂Cu₃O_{6.5 +y}controlled by thermal manipulation

et al. 2014

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While it is known that the nature and the arrangement of defects in complex oxides have an impact on the material functionalities, little is known about control of superconductivity by oxygen interstitial organization in cuprates. Here we report direct compelling evidence for the control of T c by manipulation of the superconducting granular networks of nanoscale puddles, made of ordered oxygen stripes, in a single crystal of YBa 2 Cu 3 O 6.5 + y with average formal hole doping p close to 1/8. Upon thermal treatments we were able to switch from a first network of oxygen defect striped puddles with OVIII modulation (q OVIII (a*) = (h + 3/8, k, 0) and q OVIII (a*) = (h + 5/8, k, 0)) to a second network characterized by OXVI modulation (q OXVI (a*) = (h + 7/16, k, 0) and qox-VI Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.(a*) = (h + 9/16, k, 0)) and finally to a third network with puddles of OV periodicity (q OV (a*) = (4/10, 1, 0) and q OV (a*) = (6/10, 1, 0)). We map the microscopic spatial evolution of the out of plane OVIII, OXVI and OV puddle nanosize distribution via scanning micro-diffraction measurements. In particular, we calculated the number of oxygen chains (n) and the charge density (hole concentration p) inside each puddle, analyzing areas of 160 × 80 μm 2 , and recording 12 800 diffraction patterns to reconstruct each spatial map. The high spatial inhomogeneity shown by all the reconstructed spatial maps reflects the intrinsic granular structure that characterizes cuprates and iron chalcogenides, disclosing the presence of several complex networks of coexisting superconducting domains with different lattice modulations, charge densities and gaps as in the proposed multi-gap scenario called superstripes.

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Section: Introductionmentioning

confidence: 99%

Networks of superconducting nano-puddles in 1/8 doped YBa₂Cu₃O_{6.5 +y}controlled by thermal manipulation

et al. 2014

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“…These latter local methods, applied to complex high-T c superconductors [16][17][18][19][20][21][22], have provided evidence of local electronic and lattice fluctuations otherwise not accessible. Furthermore, local lattice fluctuations in the CuO 2 plane and the electronic phase separation have been shown to favor high temperature superconductivity (HTS) in cuprates [23][24][25][26][27][28][29][30][31][32][33][34][35][36]. In the proposed superstripes scenario [25][26][27][28][29], the local lattice fluctuations at atomic scale [16][17][18][19][20][21][22][23][24] form striped puddles at nanoscale, and these puddles form complex inhomogeneous textures [25][26][27][28][29], observed up to the micron scale [5,6].…”

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confidence: 99%

Percolative superconductivity in La2CuO4.06 by lattice granularity patterns with scanning micro x-ray absorption near edge structure

Poccia¹,

Chorro²,

Ricci³

et al. 2014

Applied Physics Letters

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N. Poccia et al. "Percolative superconductivity in La 2 CuO 4.06 by lattice granularity patterns with scanning micro X-ray absorption near edge structure" Appl. Phys. Lett. 104, 221903 (2014) http://dx. AbstractThe simplest cuprate superconductor La 2 CuO 4+y with mobile oxygen interstitials exhibits a clear phase separation, but only recently a bulk multiscale structural phase separation has been observed by using scanning micro X-ray diffraction. Here we get further information on the structural phase separation, using local probe X-ray absorption near edge structure. The spatial distribution of superconducting units is a key parameter controlling percolative superconductivity in complex matter with dispersed superconducting units. These oxides form super-molecular architectures made of superconducting atomic monolayers intercalated by spacers. Oxygen interstitials enter into the rocksalt La 2 O 2+y spacer layers forming oxygen interstitials rich puddles and poor puddles. Their spatial distribution has been determined by using scanning La L 3 -edge micro X-ray absorption near edge structure. Percolating networks of oxygen rich puddles are observed in different micrometer size portions of the crystals. Moreover, the complex surface resistivity shows two jumps associated to the onset of intra-puddle and inter-puddles percolative superconductivity. The similarity of oxygen doped La 2 CuO 4+y , with the well established phase separation in iron selenide superconductors is also discussed.

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“…Finally we would like to note that these materials show an inherent inhomogeneity as it has been found experimentally [77][78][79][80][81], and theoretically it is expected near a Lifshitz transition in strongly interacting electron fluids with strong lattice fluctuations [82][83][84][85][86], which give complex geometries for the interplay of the multiple electronic components in high-temperature superconductivity with a key role of percolating superconducting pathways to establish macroscopic quantum coherence in complex systems [87,88].…”

Section: Discussionmentioning

confidence: 73%

The Road Map toward Room-Temperature Superconductivity: Manipulating Different Pairing Channels in Systems Composed of Multiple Electronic Components

et al. 2017

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Abstract:While it is known that the amplification of the superconducting critical temperature T C is possible in a system of multiple electronic components in comparison with a single component system, many different road maps for room temperature superconductivity have been proposed for a variety of multicomponent scenarios. Here we focus on the scenario where the first electronic component is assumed to have a vanishing Fermi velocity corresponding to a case of the intermediate polaronic regime, and the second electronic component is in the weak coupling regime with standard high Fermi velocity using a mean field theory for multiband superconductivity. This roadmap is motivated by compelling experimental evidence for one component in the proximity of a Lifshitz transition in cuprates, diborides, and iron based superconductors. By keeping a constant and small exchange interaction between the two electron fluids, we search for the optimum coupling strength in the electronic polaronic component which gives the largest amplification of the superconducting critical temperature in comparison with the case of a single electronic component.

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Ineluctable Complexity of High Temperature Superconductivity Elucidated

Cited by 11 publications

References 15 publications

Networks of superconducting nano-puddles in 1/8 doped YBa₂Cu₃O_{6.5 +y}controlled by thermal manipulation

Networks of superconducting nano-puddles in 1/8 doped YBa₂Cu₃O_{6.5 +y}controlled by thermal manipulation

Percolative superconductivity in La2CuO4.06 by lattice granularity patterns with scanning micro x-ray absorption near edge structure

The Road Map toward Room-Temperature Superconductivity: Manipulating Different Pairing Channels in Systems Composed of Multiple Electronic Components

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Ineluctable Complexity of High Temperature Superconductivity Elucidated

Cited by 11 publications

References 15 publications

Networks of superconducting nano-puddles in 1/8 doped YBa2Cu3O6.5 +ycontrolled by thermal manipulation

Networks of superconducting nano-puddles in 1/8 doped YBa2Cu3O6.5 +ycontrolled by thermal manipulation

Percolative superconductivity in La2CuO4.06 by lattice granularity patterns with scanning micro x-ray absorption near edge structure

The Road Map toward Room-Temperature Superconductivity: Manipulating Different Pairing Channels in Systems Composed of Multiple Electronic Components

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Networks of superconducting nano-puddles in 1/8 doped YBa₂Cu₃O_{6.5 +y}controlled by thermal manipulation

Networks of superconducting nano-puddles in 1/8 doped YBa₂Cu₃O_{6.5 +y}controlled by thermal manipulation