Physical Review A, volume 144, issue 2, pages 751-763

Theory and Observation of Intrinsic Surface States on Ionic Crystals

Jules D. Levine 1
Mark Peter 1
1
 
RCA LABORATORIES, PRINCETON, NEW JERSEY
Publication typeJournal Article
Publication date1966-04-15
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor2.9
ISSN24699926, 24699934, 0031899X, 10502947, 10941622
General Physics and Astronomy
Abstract
A comprehensive theory of surface states on ionic crystals has been derived using Seitz's approach to bulk crystal energy states as a starting point. Surface ions are considered equivalent to bulk ions except for their reduced Madelung constant. The relationship of surface levels to bulk bandgap is expressed as a function of surface geometry and bulk material properties, and it is calculated using classical electrostatics for many surfaces of 46 halides, oxides, and sulfides. Symmetry arguments show that only for a checkerboard-like surface are the surface states symmetrically disposed about midgap. Numerical calculations show that one electron trap is formed from each surface cation and one hole trap for each surface anion; trap depths should be deepest for HgS, CdS, and ZnS; and for a $(11\overline{2}0)$ CdS surface the trap depths should be 0.2 to 0.4 eV, depending on the effective ionic charge assumed of 0.5 to 2.0. Intrinsic surface states were detected on the $(11\overline{2}0)$ surfaces of vapor phase grown insulating CdS single crystal platelets. Photoconductivity experiments (response time and thermally stimulated currents) indicate that these surface states function as traps for the photocarriers (electrons and holes) from the bulk.

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Levine J. D., Peter M. Theory and Observation of Intrinsic Surface States on Ionic Crystals // Physical Review A. 1966. Vol. 144. No. 2. pp. 751-763.
GOST all authors (up to 50) Copy
Levine J. D., Peter M. Theory and Observation of Intrinsic Surface States on Ionic Crystals // Physical Review A. 1966. Vol. 144. No. 2. pp. 751-763.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1103/physrev.144.751
UR - https://doi.org/10.1103/physrev.144.751
TI - Theory and Observation of Intrinsic Surface States on Ionic Crystals
T2 - Physical Review A
AU - Levine, Jules D.
AU - Peter, Mark
PY - 1966
DA - 1966/04/15 00:00:00
PB - American Physical Society (APS)
SP - 751-763
IS - 2
VL - 144
SN - 2469-9926
SN - 2469-9934
SN - 0031-899X
SN - 1050-2947
SN - 1094-1622
ER -
BibTex |
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BibTex Copy
@article{1966_Levine,
author = {Jules D. Levine and Mark Peter},
title = {Theory and Observation of Intrinsic Surface States on Ionic Crystals},
journal = {Physical Review A},
year = {1966},
volume = {144},
publisher = {American Physical Society (APS)},
month = {apr},
url = {https://doi.org/10.1103/physrev.144.751},
number = {2},
pages = {751--763},
doi = {10.1103/physrev.144.751}
}
MLA
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MLA Copy
Levine, Jules D., and Mark Peter. “Theory and Observation of Intrinsic Surface States on Ionic Crystals.” Physical Review A, vol. 144, no. 2, Apr. 1966, pp. 751-763. https://doi.org/10.1103/physrev.144.751.
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