Doping of p-type ZnSb: Single parabolic band model and impurity band conduction

2011 ◽  
Vol 208 (12) ◽  
pp. 2753-2759 ◽  
Author(s):  
P. H. Michael Böttger ◽  
Gregory S. Pomrehn ◽  
G. Jeffrey Snyder ◽  
Terje G. Finstad
1967 ◽  
Vol 45 (1) ◽  
pp. 119-126 ◽  
Author(s):  
J. Basinski ◽  
R. Olivier

Hall effect and resistivity measurements have been made in the temperature range 4.2–360 °K on several samples of n-type GaAs grown under oxygen atmosphere and without any other intentional dopings. The principal shallow donor in this material is considered to be Si. All samples exhibited impurity-band conduction at low temperature. Electron concentrations in the conduction band were calculated, using a two-band model, and then fitted to the usual equation expressing charge neutrality. A value of 2.3 × 10−3 eV was obtained for the ionization energy of the donors, for donor concentration ranging from 5 × 1015 cm−3 to 2 × 1016 cm−3. The conduction in the impurity band was of the hopping type for these concentrations. A value of 3.5 × 1016 cm−3 was obtained for the critical transition concentration of the impurity-band conduction to the metallic type.


2012 ◽  
Vol 101 (8) ◽  
pp. 082106 ◽  
Author(s):  
Brendan Gunning ◽  
Jonathan Lowder ◽  
Michael Moseley ◽  
W. Alan Doolittle

2018 ◽  
Vol 84 ◽  
pp. 115-118 ◽  
Author(s):  
Guiying Shen ◽  
Youwen Zhao ◽  
Yongbiao Bai ◽  
Ding Yu ◽  
Jingming Liu ◽  
...  

1982 ◽  
Vol 60 (1) ◽  
pp. 102-108
Author(s):  
B. A. Lombos ◽  
M. Averous ◽  
C. Fau ◽  
J. Calas ◽  
S. Charar

Transport property measurements on p-type germanium, doped to be in the intermediate concentration region (1016 < NA < 1018 cm−3), were performed in the temperature range of 1.6–77 K under static (up to 337 MPa) and modulated (2.4 on 180 MPa) uniaxial compression. To elucidate the conduction mechanisms in this region the position of the Fermi level is calculated as a function of temperature and uniaxial stress and correlated to the variation of the measured transport properties. The analyses indicate an Anderson type metallic conduction, characteristic of random, amorphous systems, while the Fermi level is in the impurity band. Mott type metallic conduction, characteristic to periodic systems, determines the transport properties as the Fermi level moves out of the impurity band.


1983 ◽  
Vol 117 (1) ◽  
pp. 407-416
Author(s):  
K. D. Chaudhuri ◽  
Anita Malik ◽  
Sunita Kukreti ◽  
P. C. Mathur

2002 ◽  
Vol 744 ◽  
Author(s):  
A. Srujana ◽  
A. Wadhawan ◽  
K. Srikala ◽  
B.P. Gorman ◽  
R.J. Cottier ◽  
...  

ABSTRACTIron disilicide shows great promise as a silicon based light emitter operating in the 1.3 to 1.5 μm wavelength range. However, there exists a number of questions related to the band structure and the ability to alloy and controllably dope the material both n and p type. In this paper we present Raman and magneto transport studies on β-FeSi2, β-(Fe1-xCrx)Si2, and β-(Fe1-xCox)Si2 grown by MBE. By comparing the spectra obtained for undoped and doped samples we provide a general overview of the effects of doping on the crystallinity of the material. The temperature dependent (4K<T<300K) magneto transport illustrates that Cr is a p-type dopant and Co is an n-type dopant in β-FeSi2.The temperature dependence of the resistivity indicates that the transport properties at higher temperatures are determined by free carriers whereas at lower temperatures impurity band conduction prevails.


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