Absence of superconductivity in BaPbO3

Verheijen, A. A.; Fu, Wei; Ruitenbeek, J. M. van; Smits, Alexander J.; Xu, Qiang; Jongh, L.J. de

doi:10.1016/0038-1098(89)90538-3

Cited by 10 publications

(2 citation statements)

References 4 publications

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“…Transport measurements exhibited metallic behavior in BaPbO 3 and a semiconducting behavior in Ba 2 PbO 4 with temperature [5][6][7]. The driving mechanism of BPO metallicity is not very clear in the literature.…”

Section: Introductionmentioning

confidence: 98%

Electronic structure of BaPbO₃and Ba₂PbO₄

Medicherla¹,

Shripathi

Lalla

2007

J. Phys.: Condens. Matter

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The electronic structure of BaPbO3 and Ba2PbO4 was investigated using photoemission, x-ray diffraction (XRD) and tight binding linear muffin tin orbital (TB-LMTO) band structure techniques. BaPbO3 is a base material for all Pb based superconductors. Rietveld analysis of the XRD data suggested that BaPbO3 is an orthorhombically distorted perovskite with Imma space group and Ba2PbO4 possesses tetragonal structure with I4/mmm space group. LMTO calculations indicated an insulating ground state for Ba2PbO4 with a band gap of 1.3 eV and a metallic ground state for BaPbO3. Ultraviolet photoemission results agree well with the LMTO calculations. The Pb–O1–Pb bond angle in the basal plane is a key parameter in deciding the electronic structure of these compounds. The Pb 4f and O 1s core levels of BaPbO3 exhibited asymmetry on the high binding energy side of the peak, indicating that both Pb and O contribute to the density of states at the Fermi edge. The core levels of Ba2PbO4 did not exhibit asymmetry. Core level asymmetry can be used to probe the local density of states at EF.

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Section: Introductionmentioning

confidence: 98%

Electronic structure of BaPbO₃and Ba₂PbO₄

Medicherla¹,

Shripathi

Lalla

2007

J. Phys.: Condens. Matter

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show abstract

“…Nitta et al (1965), Ikushima and Hayakawa (1966), and Shannon and Bierstedt (1970) report that BaPbO 3 is a semiconductor with electrical resistivities at room temperature of 8.3X10" 4 , 5.6X10" 4 , and 8.3X10" 4 O-cm, respectively. A superconducting transition at about 0.4 K in BaPbO 3 , reported by Bogatko and Venevtsev (1980), was not seen in the samples of Verheijen et al (1989). A Japanese patent (Nomura and Yoshino, 1985) claims that BaPbO 3+x (0< x=£0.2) has low resistivity and shows a positive temperature coefficient of resistivity (PTCR) effect above 700 °C.…”

Section: Introductionmentioning

confidence: 93%