Photoemission and x-ray absorption study of superconducting and semiconducting Ba1-xKxBiO3 single crystals

M. Qvarford; V. G. Nazin; A. A. Zakharov; M. N. Mikheeva; J. N. Andersen; Mikael Johansson; G. Chiaia; T. Rogelet; S. Söderholm; O. Tjernberg; H. Nylén; I. Lindau; R. Nyholm; U. O. Karlsson; S. N. Barilo; S. V. Shiryaev

doi:10.1103/PhysRevB.54.6700

Photoemission and x-ray absorption study of superconducting and semiconducting Ba1-xKxBiO3 single crystals

M. Qvarford, V. G. Nazin, A. A. Zakharov, M. N. Mikheeva, J. N. Andersen, Mikael Johansson, G. Chiaia, T. Rogelet, S. Söderholm, O. Tjernberg, H. Nylén, I. Lindau, R. Nyholm, U. O. Karlsson, S. N. Barilo, S. V. Shiryaev

Synchrotron Radiation Research

Research output: Contribution to journal › Article › peer-review

Abstract

Semiconducting Ba_0.9K_0.1BiO₃ and superconducting Ba_0.6K_0.4BiO₃ single crystals cleaved in situ have been studied by core level and valence band photoelectron spectroscopy and O K edge x-ray absorption spectroscopy. It was found that the general shape of the valence band spectrum agrees with the shape predicted by band structure calculations, but the intensity near the Fermi level was lower in the experimental spectrum as compared to the calculated. The O K edge spectra showed that the metallic phase is not related to the presence of doping inducted O 2p holes. This property of Ba_1-xK_xBiO₃ shows that the semiconductor-metal transition of this system is of a different nature than that of the hole doped cuprate high-T_c superconductors. The core level photoemission spectra of the cations showed a small asymmetry for Ba^0.9K_0.1BiO₃. Corresponding spectra for Ba_0.6K_0.4BiO₃ showed a larger asymmetry resulting in a resolved high binding energy shoulder in the Bi 4f spectrum. The origin of this feature is discussed.

Original language	English
Pages (from-to)	6700-6707
Number of pages	8
Journal	Physical Review B (Condensed Matter)
Volume	54
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.54.6700
Publication status	Published - 1996 Sept 1

Subject classification (UKÄ)

Condensed Matter Physics (including Material Physics, Nano Physics)

Access to Document

10.1103/PhysRevB.54.6700

Cite this

Qvarford, M., Nazin, V. G., Zakharov, A. A., Mikheeva, M. N., Andersen, J. N., Johansson, M., Chiaia, G., Rogelet, T., Söderholm, S., Tjernberg, O., Nylén, H., Lindau, I., Nyholm, R., Karlsson, U. O., Barilo, S. N., & Shiryaev, S. V. (1996). Photoemission and x-ray absorption study of superconducting and semiconducting Ba1-xKxBiO3 single crystals. Physical Review B (Condensed Matter), 54(9), 6700-6707. https://doi.org/10.1103/PhysRevB.54.6700

@article{1d9cd4d24302499e98a80c5d4aea5e32,

title = "Photoemission and x-ray absorption study of superconducting and semiconducting Ba1-xKxBiO3 single crystals",

abstract = "Semiconducting Ba0.9K0.1BiO3 and superconducting Ba0.6K0.4BiO3 single crystals cleaved in situ have been studied by core level and valence band photoelectron spectroscopy and O K edge x-ray absorption spectroscopy. It was found that the general shape of the valence band spectrum agrees with the shape predicted by band structure calculations, but the intensity near the Fermi level was lower in the experimental spectrum as compared to the calculated. The O K edge spectra showed that the metallic phase is not related to the presence of doping inducted O 2p holes. This property of Ba1-xKxBiO3 shows that the semiconductor-metal transition of this system is of a different nature than that of the hole doped cuprate high-Tc superconductors. The core level photoemission spectra of the cations showed a small asymmetry for Ba0.9K0.1BiO3. Corresponding spectra for Ba0.6K0.4BiO3 showed a larger asymmetry resulting in a resolved high binding energy shoulder in the Bi 4f spectrum. The origin of this feature is discussed.",

author = "M. Qvarford and Nazin, {V. G.} and Zakharov, {A. A.} and Mikheeva, {M. N.} and Andersen, {J. N.} and Mikael Johansson and G. Chiaia and T. Rogelet and S. S{\"o}derholm and O. Tjernberg and H. Nyl{\'e}n and I. Lindau and R. Nyholm and Karlsson, {U. O.} and Barilo, {S. N.} and Shiryaev, {S. V.}",

year = "1996",

month = sep,

day = "1",

doi = "10.1103/PhysRevB.54.6700",

language = "English",

volume = "54",

pages = "6700--6707",

journal = "Physical Review B (Condensed Matter)",

issn = "0163-1829",

publisher = "American Physical Society",

number = "9",

}

Qvarford, M, Nazin, VG, Zakharov, AA, Mikheeva, MN, Andersen, JN, Johansson, M, Chiaia, G, Rogelet, T, Söderholm, S, Tjernberg, O, Nylén, H, Lindau, I, Nyholm, R, Karlsson, UO, Barilo, SN & Shiryaev, SV 1996, 'Photoemission and x-ray absorption study of superconducting and semiconducting Ba1-xKxBiO3 single crystals', Physical Review B (Condensed Matter), vol. 54, no. 9, pp. 6700-6707. https://doi.org/10.1103/PhysRevB.54.6700

TY - JOUR

T1 - Photoemission and x-ray absorption study of superconducting and semiconducting Ba1-xKxBiO3 single crystals

AU - Qvarford, M.

AU - Nazin, V. G.

AU - Zakharov, A. A.

AU - Mikheeva, M. N.

AU - Andersen, J. N.

AU - Johansson, Mikael

AU - Chiaia, G.

AU - Rogelet, T.

AU - Söderholm, S.

AU - Tjernberg, O.

AU - Nylén, H.

AU - Lindau, I.

AU - Nyholm, R.

AU - Karlsson, U. O.

AU - Barilo, S. N.

AU - Shiryaev, S. V.

PY - 1996/9/1

Y1 - 1996/9/1

N2 - Semiconducting Ba0.9K0.1BiO3 and superconducting Ba0.6K0.4BiO3 single crystals cleaved in situ have been studied by core level and valence band photoelectron spectroscopy and O K edge x-ray absorption spectroscopy. It was found that the general shape of the valence band spectrum agrees with the shape predicted by band structure calculations, but the intensity near the Fermi level was lower in the experimental spectrum as compared to the calculated. The O K edge spectra showed that the metallic phase is not related to the presence of doping inducted O 2p holes. This property of Ba1-xKxBiO3 shows that the semiconductor-metal transition of this system is of a different nature than that of the hole doped cuprate high-Tc superconductors. The core level photoemission spectra of the cations showed a small asymmetry for Ba0.9K0.1BiO3. Corresponding spectra for Ba0.6K0.4BiO3 showed a larger asymmetry resulting in a resolved high binding energy shoulder in the Bi 4f spectrum. The origin of this feature is discussed.

AB - Semiconducting Ba0.9K0.1BiO3 and superconducting Ba0.6K0.4BiO3 single crystals cleaved in situ have been studied by core level and valence band photoelectron spectroscopy and O K edge x-ray absorption spectroscopy. It was found that the general shape of the valence band spectrum agrees with the shape predicted by band structure calculations, but the intensity near the Fermi level was lower in the experimental spectrum as compared to the calculated. The O K edge spectra showed that the metallic phase is not related to the presence of doping inducted O 2p holes. This property of Ba1-xKxBiO3 shows that the semiconductor-metal transition of this system is of a different nature than that of the hole doped cuprate high-Tc superconductors. The core level photoemission spectra of the cations showed a small asymmetry for Ba0.9K0.1BiO3. Corresponding spectra for Ba0.6K0.4BiO3 showed a larger asymmetry resulting in a resolved high binding energy shoulder in the Bi 4f spectrum. The origin of this feature is discussed.

UR - http://www.scopus.com/inward/record.url?scp=0007017663&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.54.6700

DO - 10.1103/PhysRevB.54.6700

M3 - Article

AN - SCOPUS:0007017663

SN - 0163-1829

VL - 54

SP - 6700

EP - 6707

JO - Physical Review B (Condensed Matter)

JF - Physical Review B (Condensed Matter)

IS - 9

ER -

Photoemission and x-ray absorption study of superconducting and semiconducting Ba1-xKxBiO3 single crystals

Abstract

Subject classification (UKÄ)

Access to Document

Other files and links

Fingerprint

Cite this