INTRINSIC CARRIER CONCENTRATION OF NARROW-GAP MERCURY CADMIUM TELLURIDE BASED ON THE NONLINEAR TEMPERATURE-DEPENDENCE OF THE BAND-GAP

被引:46
作者
LOWNEY, JR [1 ]
SEILER, DG [1 ]
LITTLER, CL [1 ]
YOON, IT [1 ]
机构
[1] UNIV N TEXAS,DEPT PHYS,DENTON,TX 76203
关键词
D O I
10.1063/1.351371
中图分类号
O59 [应用物理学];
学科分类号
摘要
The intrinsic carrier concentrations of narrow-gap Hg1-xCdxTe alloys have been calculated as a function of temperature between 0 and 300 K for x values between 0.17 and 0.30. The new and more accurate relation for the temperature dependence of the energy gap, which is based on two-photon magnetoabsorption data, is used. This relation is further supported here by additional one-photon magnetoabsorption measurements for x = 0.20 and 0.23, which were made with a CO2 laser. In this range of composition and temperature, the energy gap of mercury cadmium telluride is small, and very accurate values for the gap are needed to obtain reliable values for the intrinsic carrier density. Kane's k'p theory is used to account for the conduction-band nonparabolicity. Large percentage differences occur between our new calculations and previously calculated values for n(i) at low temperatures. A nonlinear least-squares fit was made to the results of our calculations for ease of use. The implications of these results for Hg1-xCdxTe materials characterization and device operations are discussed.
引用
收藏
页码:1253 / 1258
页数:6
相关论文
共 13 条
[1]   CALCULATION OF THE AUGER LIFETIME IN PARA-TYPE HG1-XCDXTE [J].
CASSELMAN, TN .
JOURNAL OF APPLIED PHYSICS, 1981, 52 (02) :848-854
[2]   ENERGY-GAP VERSUS ALLOY COMPOSITION AND TEMPERATURE IN HG1-XCDXTE [J].
HANSEN, GL ;
SCHMIT, JL ;
CASSELMAN, TN .
JOURNAL OF APPLIED PHYSICS, 1982, 53 (10) :7099-7101
[3]   CALCULATION OF INTRINSIC CARRIER CONCENTRATION IN HG1-XCDXTE [J].
HANSEN, GL ;
SCHMIT, JL .
JOURNAL OF APPLIED PHYSICS, 1983, 54 (03) :1639-1640
[4]   BAND STRUCTURE OF INDIUM ANTIMONIDE [J].
KANE, EO .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1957, 1 (04) :249-261
[5]   INTRINSIC CARRIER CONCENTRATIONS IN HG1-XCDXTE WITH THE USE OF FERMI-DIRAC STATISTICS [J].
MADARASZ, FL ;
SZMULOWICZ, F .
JOURNAL OF APPLIED PHYSICS, 1985, 58 (07) :2770-2772
[6]   INTRINSIC CARRIER CONCENTRATIONS AND EFFECTIVE MASSES IN HG1-XCDXTE [J].
MADARASZ, FL ;
SZMULOWICZ, F ;
MCBATH, JR .
JOURNAL OF APPLIED PHYSICS, 1985, 58 (01) :361-365
[7]  
NEMIROVSKY Y, 1980, J APPL PHYS, V50, P8107
[9]   TEMPERATURE AND COMPOSITION DEPENDENCE OF THE ENERGY-GAP OF HG1-XCDXTE BY 2-PHOTON MAGNETOABSORPTION TECHNIQUES [J].
SEILER, DG ;
LOWNEY, JR ;
LITTLER, CL ;
LOLOEE, MR .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1990, 8 (02) :1237-1244
[10]   NONLINEAR MAGNETO-OPTICAL SPECTROSCOPY OF HG1-XCDXTE BY 2-PHOTON ABSORPTION TECHNIQUES [J].
SEILER, DG ;
LITTLER, CL ;
LOLOEE, MR ;
MILAZZO, SA .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1989, 7 (02) :370-376