Phase transition in ultrathin Bi films

M. G. Mitch; S. J. Chase; J. Fortner; R. Q. Yu; J. S. Lannin

doi:10.1103/PhysRevLett.67.875

Phase transition in ultrathin Bi films

M. G. Mitch, S. J. Chase, J. Fortner, R. Q. Yu, J. S. Lannin

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Abstract

Dynamical studies of Bi ultrathin films prepared on carbon at 100 K exhibit a phase transition from nanocrystalline to amorphouslike clusters. Evidence for the transition at a thickness of 8 is provided by the form, intensity, and polarization dependence of in situ Raman-scattering measurements in ultrahigh vacuum. A substantial increase in frequency of the opticlike band with decreasing thickness indicates increased covalent interactions. This contrasts with superconducting Bi films, suggesting a semiconducting amorphous state in clusters.

Original language	English
Pages (from-to)	875-878
Number of pages	4
Journal	Physical Review Letters
Volume	67
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.67.875
State	Published - 1991
Externally published	Yes

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10.1103/PhysRevLett.67.875

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title = "Phase transition in ultrathin Bi films",

abstract = "Dynamical studies of Bi ultrathin films prepared on carbon at 100 K exhibit a phase transition from nanocrystalline to amorphouslike clusters. Evidence for the transition at a thickness of 8 is provided by the form, intensity, and polarization dependence of in situ Raman-scattering measurements in ultrahigh vacuum. A substantial increase in frequency of the opticlike band with decreasing thickness indicates increased covalent interactions. This contrasts with superconducting Bi films, suggesting a semiconducting amorphous state in clusters.",

author = "Mitch, {M. G.} and Chase, {S. J.} and J. Fortner and Yu, {R. Q.} and Lannin, {J. S.}",

year = "1991",

doi = "10.1103/PhysRevLett.67.875",

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journal = "Physical Review Letters",

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AU - Fortner, J.

AU - Yu, R. Q.

AU - Lannin, J. S.

PY - 1991

Y1 - 1991

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AB - Dynamical studies of Bi ultrathin films prepared on carbon at 100 K exhibit a phase transition from nanocrystalline to amorphouslike clusters. Evidence for the transition at a thickness of 8 is provided by the form, intensity, and polarization dependence of in situ Raman-scattering measurements in ultrahigh vacuum. A substantial increase in frequency of the opticlike band with decreasing thickness indicates increased covalent interactions. This contrasts with superconducting Bi films, suggesting a semiconducting amorphous state in clusters.

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Phase transition in ultrathin Bi films

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