Electronic and atomic structure of metastable phases of boron nitride using core-level photoabsorption

Journal Article · Mon Oct 11 00:00:00 EDT 1993 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.110556· OSTI ID:5993527

Chaiken, A; Terminello, L J; Wong, J ^[1]; Doll, G L; Taylor, II, C A ^[2]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
2. Physics Department, GM Research Laboratory, Warren, Michigan 48090 (United States)

Soft x-ray core-level photoabsorption has been measured from three forms of boron nitride, namely the hexagonal ([ital h]BN), cubic ([ital c]BN), and incoherent ([ital i]BN) phases. The B 1[ital s] and N 1[ital s] photoabsorption spectra of the [ital h]BN sample show evidence of both [sigma]*- and [pi]*-empty states, indicative of [ital sp][sup 2] bonding, while the [ital c]BN absorption spectra exhibits only [ital sp][sup 3] bonding in absorption features characteristic of the zincblende structure. The incoherent phase of BN in the form of a thin film on a Si substrate possesses [sigma]* and [pi]* states similar to [ital h]BN. The B 1[ital s] [pi]* absorption features of the [ital i]BN film show an angular dependence which suggests that the microstructure consists of hexagonal-phase layer planes oriented normal to the BN/Si interface.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5993527
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 63:15; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
665100 -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
BORON COMPOUNDS
BORON NITRIDES
BREMSSTRAHLUNG
CHEMICAL BONDS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
EXCITED STATES
FILMS
METASTABLE STATES
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
PHASE STUDIES
PNICTIDES
RADIATIONS
SPECTRA
SPECTROSCOPY
SYNCHROTRON RADIATION
X-RAY SPECTROSCOPY