Normal-state transport properties of Ba1−K BiO3 crystals

Nagata, Y.; Mishiro, A.; Uchida, Takayuki; Ohtsuka, Masao; Samata, H.

doi:10.1016/s0022-3697(99)00217-6

Cited by 29 publications

(22 citation statements)

References 34 publications

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“…However, it tends to saturate at lower temperatures. The ρ(T −1/4 ) was fitted by a parallel circuit model, which was successfully applied to explain the transport properties of Ba 1−x K x BiO 3 [13,14]. In the parallel circuit model, the resistivity ρ is represented by…”

Section: Electric Propertiesmentioning

confidence: 99%

Insulator–metal transition induced in Sr1−Na Pd3O4 for small Na-substitutions

Taniguchi¹,

Nagata²,

Ozawa³

et al. 2004

Journal of Alloys and Compounds

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Section: Electric Propertiesmentioning

confidence: 99%

Insulator–metal transition induced in Sr1−Na Pd3O4 for small Na-substitutions

Taniguchi¹,

Nagata²,

Ozawa³

et al. 2004

Journal of Alloys and Compounds

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“…Because of the high reaction temperature and the volatility of K, the inhomogeneous chemical composition and the multiphase of the sample usually cannot be avoided. Subsequently, electrochemical deposition method was also adopted to prepare the Ba 1−x K x BiO 3 system [11,12], especially for the growth of its large single crystals [13]. Nevertheless, the chemical composition and the superconducting properties are limited by many factors due to the complex reaction mechanism.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of superconductors Ba1−xKxBiO3 and double perovskites Ba1−xKxBi1−yNayO3

Zhang

Huang

et al. 2011

Journal of Alloys and Compounds

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“…BKBO superconductors have the formal oxidation state of bismuth ions in the range of 4.35-4.55 [17,22]. A part of bismuth ions may be present in the stable oxidation state +3.…”

mentioning

confidence: 99%

Noncubic layered structure ofBa1−xKxBiO
Клинкова
¹
,
Uchida
²
,
Matsui
³

et al. 2003
Phys. Rev. B
26
1
17
0
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Bismuthate superconductor grown by an electrolysis technique was studied by electron diffraction and high-resolution electron microscopy. The crystalline structure thereof has been found to be non-cubic, non-centrosymmetric and of the layered nature, with the lattice parameters a≈ap, c≈2ap (ap is a simple cubic perovskite cell parameter) containing an ordered arrangement of barium and potassium. The evidence for the layered nature of the bismuthate superconductor removes the principal crystallographic contradiction between bismuthate and cuprate high-Tc superconductors.Superconducting bismuthates including the firstly dis-[2] with the highest transition temperature (T c =32-35K for x≈0.4) have the basic characteristics similar to those of high-T c copper-oxide superconductors [3]. This might favor for a common pairing mechanism. On the other hand, bismuthates have been generally considered to be fundamentally different from cuprates due to two reasons. Bismuthates are non-magnetic, and they have three-dimensional structures rather than layered twodimensional ones characteristic of cuprates. Of these two contradictions, the most important one seems to be the latter. The absence of magnetic fluctuations in bismuthates may point to a non-magnetic nature of the pairing mechanism, whereas it is unlikely that a common superconducting scenario in cuprates and bismuthates does not depend on lattice dimensionality.The study of BKBO is of a particular interest also for understanding the relation between charge-density-waves (CDWs) and superconductivity in high-T c oxides. The parent compound for BKBO is the perovskite BaBiO 3 containing a CDW formed of an ordered arrangement of non-equivalent bismuth ions referred to as Bi 3+ and Bi 5+[4]. This CDW is assumed to be responsible for the semiconducting behavior of BaBiO 3 and Ba 1−x K x BiO 3 materials with low potassium content (x < 0.25). The widely known notion that BKBO superconductors have a simple cubic ABO 3 solid-solution structure of a non-layered nature, with barium and potassium randomly occupying the A-position, was inferred from long-range structural studies of ceramic samples by X-ray [5] and neutron diffraction [6]. A simple cubic structure excludes the existence of a CDW that leads to the conclusion of the total incompatibility of CDWs and superconductivity. However, studies of BKBO by methods sensitive to short-range symmetry, in particular, by Raman scattering spectroscopy [7], a paired-distribution function analysis of neutron diffraction data [8], extended X-ray fine structure analysis (EXAFS) [9,10] evidence that the local structure of BKBO superconductors is not cubic. An X-ray diffraction study [11] [15]. Ba n Bi n+m O y are assumed to be matrices transformed, when intercalated with potassium, into superconducting oxides retaining the layered nature of the matrices structures. Besides, Ba-rich oxides with a solid-solution structure that attributed to BKBO superconductors were discovered [16]. Such oxides are formed in two-phase regions of the Ba-Bi-O ...

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Normal-state transport properties of Ba1−K BiO3 crystals

Cited by 29 publications

References 34 publications

Insulator–metal transition induced in Sr1−Na Pd3O4 for small Na-substitutions

Insulator–metal transition induced in Sr1−Na Pd3O4 for small Na-substitutions

Hydrothermal synthesis of superconductors Ba1−xKxBiO3 and double perovskites Ba1−xKxBi1−yNayO3

Noncubic layered structure ofBa1−xKxBiO
Клинкова
¹
,
Uchida
²
,
Matsui
³

et al. 2003
Phys. Rev. B
26
1
17
0
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Normal-state transport properties of Ba1−K BiO3 crystals

Cited by 29 publications

References 34 publications

Insulator–metal transition induced in Sr1−Na Pd3O4 for small Na-substitutions

Insulator–metal transition induced in Sr1−Na Pd3O4 for small Na-substitutions

Hydrothermal synthesis of superconductors Ba1−xKxBiO3 and double perovskites Ba1−xKxBi1−yNayO3

Noncubic layered structure ofBa1−xKxBiOКлинкова1, Uchida2, Matsui3 et al. 2003Phys. Rev. B261170View full textAdd to dashboardCite

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About

Noncubic layered structure ofBa1−xKxBiO
Клинкова
¹
,
Uchida
²
,
Matsui
³

et al. 2003
Phys. Rev. B
26
1
17
0
View full text Add to dashboard Cite