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Temperature dependence of hole drift mobility in high‐purity single‐crystal CVD diamond
Author(s) -
Isberg Jan,
Lindblom Adam,
Tajani Antonella,
Twitchen Daniel
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200561915
Subject(s) - diamond , scattering , impurity , excitation , electron mobility , single crystal , charge carrier , space charge , crystal (programming language) , ionization , ionized impurity scattering , materials science , phonon , condensed matter physics , atomic physics , chemistry , molecular physics , optics , optoelectronics , physics , electron , crystallography , ion , programming language , organic chemistry , quantum mechanics , computer science , composite material
Abstract Hole transport properties in high‐purity single crystal CVD diamond samples were studied using the time of flight technique with optical excitation of the carriers. The measurements were taken at different temperatures in the interval 80–470 K. By varying the intensity of the optical excitation over several orders of magnitude, measurements at different carrier concentrations have been performed. In this way, measurements have been made both in the space charge limited and non space charge limited regimes, with consistent results. The temperature dependence of the low‐field hole drift mobility shows a T α dependence with α ≈ –1.5, below 350 K. This indicates that acoustic phonon scattering is the dominant scattering mechanism and a very low concentration of ionized impurities in this material. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)