(a) Scanning electron microscopy (SEM) of the measurement device. Scale . (b) Enlarged view of the four electrodes on the InSb nanowire. Scale . (c) Transmission electron microscopy (TEM) image of an InSb nanowire. Scale .
(a) Calculated surface temperature rise of the device shown in Fig. 1(a) when a current passes through the heater line. The dimension of the thermal image is wide and long. Point E in Fig. 1(b) is located at below the top edge and from the right edge. (b) Temperature rise along the thermometer line. Point E in Fig. 1(b) is located at . (c) Temperature rise along the nanowire. Points E and J in Fig. 1(b) are located at 0 and , respectively.
The measurement results of Seebeck coefficient of the InSb nanowire as a function of temperature . The filled circles are the as-measured data and the upper bounds of the error bars are the corrected ones based on the temperature measurement error estimated by the thermal simulation. The calculation results based on the 1D MB (black line) and 3D (gray line) DOS were made to fit with the as-measured data by adjusting the corresponding Fermi energy values at different temperatures, and cannot be distinguished from each other in many areas of the plot.
The measurement results (filled circles) of the electrical conductivity of the InSb nanowire as a function of temperature. The black line and the gray line are the calculation results of the 1D MB and 3D models, respectively.
The thermoelectric power factor of the InSb nanowire as a function of temperature.
Seebeck coefficient vs Fermi level for the MB DOS at different temperatures.
Fermi levels used for the 1D MB (black line) and 3D (gray line) models. Solid circles represent possible values of that can yield the as-measured values at different temperatures using the 1D MB model.
Calculated carrier concentrations as a function of temperature for the 1D MB (black line) and 3D (gray line) models.
Mobility as a function of temperature. The dashed line is the bulk mobility reported by Putley (Ref. 16) for electron concentration of . The gray and black solid lines are the electron mobility used in the 3D and 1D MB models, respectively, for fitting the measured electrical conductivity of the nanowire.
Article metrics loading...
Full text loading...