纳米尺度温度梯度的测量
Measuring Temperature Gradients over Nanometer Length Scales
摘要：
当量子点受到热梯度时，如果电导谱和背景温度已知，则可以从量子点的热流确定进入量子点的电子的温度。我们通过测量嵌入纳米线中的15 nm量子点的温度差来演示这种技术。当量子点的能态被许多kT分开时，可以使用这种技术，并且将使未来的电子-声子相互作用、非线性热电效应和量子点中的热电能量转换效率的定量研究成为可能。
英文摘要：
When a quantum dot is subjected to a thermal gradient, the temperature of electrons entering the dot can be determined from the dot's thermocurrent if the conductance spectrum and background temperature are known. We demonstrate this technique by measuring the temperature difference across a 15 nm quantum dot embedded in a nanowire. This technique can be used when the dot's energy states are separated by many kT and will enable future quantitative investigations of electron-phonon interaction, nonlinear thermoelectric effects, and the effciency of thermoelectric energy conversion in quantum dots.
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