Metastable behavior of the superconducting phase in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">BaBi</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant="normal">−</mml:mi><mml:mi mathvariant="italic">x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Pb</mml:mi></mml

Marx, Dominik; Radaelli, P. G.; Jorgensen, J. D.; Hitterman, R. L.; Hinks, D. G.; Pei, Shiyou; Dąbrowski, B.

doi:10.1103/physrevb.46.1144

Cited by 98 publications

(63 citation statements)

References 24 publications

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“…In both BKBO and BPBO, superconductivity seems to be associated with a metastable phase. In BPBO, superconductivity is found for 0.70 ≤ y ≤ 0.80, in a tetragonal phase (I4/mcm) which is metastable with respect to the orthorhombic phase below ≈ 450K [924,925]. Both the tetragonal and orthorhombic phases have nearly the same magnitude of tilt distortion, but the direction of distortion is different, and yet only one phase is superconducting!…”

Section: The 3d Version: Bkbo/bpbomentioning

confidence: 99%

“…The breathing mode may still play an important role in producing the strong electron-phonon coupling required for superconductivity [921] -again, in close analogy to the situation in LSCO (Section VIII.D). Once Pb is substituted for the Bi, or K for Ba, in Ba 1−x K x Bi 1−y Pb y O 3 , the breathing distortion is rapidly eliminated, near x = 0.1 or y = 0.23 [924], leaving an orthorhombic structure (Ibmm) with a pure tilt mode distortion. In both BKBO and BPBO, superconductivity seems to be associated with a metastable phase.…”

Section: The 3d Version: Bkbo/bpbomentioning

confidence: 99%

“…Within the cubic phase, T c increases with decreasing y, having its maximum value at the cubic-orthorhombic phase boundary, which is also a metal-insulator transition. In mixed compounds (both x and y nonzero), T c appears to be a smooth function of x + y only, with T c increasing monotonically as the doping is reduced towards half filling, where the CDW instability is largest [924,927].…”

Section: The 3d Version: Bkbo/bpbomentioning

confidence: 99%

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A survey of the Van Hove scenario for high-tc superconductivity with special emphasis on pseudogaps and striped phases

Markiewicz

1997

Journal of Physics and Chemistry of Solids

371

280

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The Van Hove singularity (VHS) provides a paradigm for the study of the role of peaks in the density of states (dos) on electronic properties. More importantly, it appears to play a major role in the physics of the high-Tc superconductors, particularly since recent photoemission studies have found that the VHS is close to the Fermi level in most of the high-Tc cuprates near the composition of optimum Tc. This paper offers a comprehensive survey of the VHS model, describing both theoretical properties and experimental evidence for the picture. Special topics discussed include a survey of the Fermi surfaces of the cuprates and related compounds, and an analysis of the reliability of the slave boson approach to correlation effects. While many properties of the cuprates can be qualitatively understood by a simple rigid-band-filling model, this is inadequate for more quantitative results, since correlation effects tend to pin the Fermi level near the VHS over an extended doping range, and can lead to a nanoscale phase separation. Furthermore, the peaks in the dos lead to competition from other instabilities, both magnetic and structural (related to charge density waves). A novel form of dynamic structural instability, involving dynamic VHS-Jahn-Teller effects has been predicted. Scattered through the literature, there is considerable experimental evidence for both nanoscale phase separation of holes, and for local, possibly dynamic, structural disorder. This review attempts to gather these results into a comprehensive database, to sort the results, and to see how they fit into the Van Hove scenario. Recent experiments on underdoped cuprates are found to provide a strong confirmation that the pseudogap is driven by a splitting of the VHS degeneracy.

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Section: The 3d Version: Bkbo/bpbomentioning

confidence: 99%

Section: The 3d Version: Bkbo/bpbomentioning

confidence: 99%

Section: The 3d Version: Bkbo/bpbomentioning

confidence: 99%

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A survey of the Van Hove scenario for high-tc superconductivity with special emphasis on pseudogaps and striped phases

Markiewicz

1997

Journal of Physics and Chemistry of Solids

371

280

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“…4). The Pb/Sn-O1-Pb/Sn bond angle is about 165.5° in BaPbO 3 and is about 180° in BaPb 1-x Sn x O 3 . The closer Pb/Sn-O distances, the stronger ionic interaction due more rigid and regular Pb/SnO 6 octahedral.…”

Section: Resultsmentioning

confidence: 99%

Synchrotron X-Ray Diffraction Study of BaPb1-xSnxO3 Solid Solution

Prodjosantoso¹,

Zaini²

2017

Asian J. Chem.

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“…The static and dynamic effects of the cation disorder in the sublattice of Pb(Bi)O 6 octahedra on conduction electrons are considered only in few publications. In discussing neutron diffraction results it was concluded 16 that in the range of 0.12 < x < 0.3, the crystal structure of BaPb 1−x Bi x O 3 can be considered as a micro-dispersed mixture of tetragonal and orthorhombic phases. Furthermore, a reversible change of the relative fraction of the two phases occurs with temperature.…”

Section: Introductionmentioning

confidence: 99%

207Pband17ONMR study of the electron density distribution in the metallic phase o

et al. 2002

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The 17 O and 207 Pb NMR spectra were measured in ceramic samples in the metallic phase of BaPb1−xBixO3 oxides (0 < x ≤ 0.33). The inhomogeneous magnetic broadening which appears due to a distribution of the Knight shifts was analyzed in detail. It is shown that Bi atoms, which are randomly incorporated in BaPbO3 parent compound give rise to an increased conduction electron spin density within an area which is delimited by its two first cation shells. According to NMR data the percolative overlap of these areas occurs in superconducting compositions and it is accompanied by a sharp growth of the average Knight shift < Ks >. The decrease of < 17 Ks > with temperature revealed for x = 0.33 evidences for an opening of the energy gap near EF near the metal-semiconductor transition (x = 0.35).

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Metastable behavior of the superconducting phase in theBaBi1−xPb

Cited by 98 publications

References 24 publications

A survey of the Van Hove scenario for high-tc superconductivity with special emphasis on pseudogaps and striped phases

A survey of the Van Hove scenario for high-tc superconductivity with special emphasis on pseudogaps and striped phases

Synchrotron X-Ray Diffraction Study of BaPb1-xSnxO3 Solid Solution

207Pband17ONMR study of the electron density distribution in the metallic phase o

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