Charge-density waves and superconductivity in the Ba1−xKxBiO3−y system

Shiyou Pei; N. J. Zaluzec; J. D. Jorgensen; B. Dabrowski; D. G. Hinks; A. W. Mitchell; D. R. Richards

doi:10.1103/PhysRevB.39.811

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Charge-density waves and superconductivity in the Ba1−xKxBiO3−y system

Shiyou Pei, N. J. Zaluzec, J. D. Jorgensen, B. Dabrowski, D. G. Hinks, A. W. Mitchell, D. R. Richards

DOI 10.1103/PhysRevB.39.811 · Physical Review B

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Abstract

Electron diffraction confirms the existence of a cubic phase and a phase having a 2a×2a×2a supercell in the Ba1−xKxBiO3 system. It is also found that the supercell phase displays an additional incommensurate structural modulation along the [110] cubic direction. Since the modulation is observed in the semiconducting supercell phase and not in the superconducting cubic phase, such an observation leads to speculation that superconductivity in the Ba1−xKxBiO3 system is associated with the disappearance of a charge-density wave.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30	Pressure not reported	unknown
BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	13	Pressure not reported	unknown