Generation of constant-amplitude radio-frequency sweeps at a tunnel junction for spin resonance STM
Generation of constant-amplitude radio-frequency sweeps at a tunnel junction for spin resonance STM
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DOI：
10.1063/1.4955446
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发表时间：
2016-07-01
影响因子：
1.6
通讯作者：
Heinrich, Andreas J.
中科院分区：
文献类型：
--
作者：
Paul, William;Baumann, Susanne;Heinrich, Andreas J.
我们描述了在宽频率范围（15.5-35.5 GHz）和高动态范围（>50 dB）的扫描隧道显微镜的射频传递函数的测量和成功的补偿。电缆谐振和衰减的精确补偿对于电场驱动电子自旋共振（ESR）实验中恒压扫频的产生至关重要。我们还表明，一个良好的校准隧道结电压是必要的，以避免寄生ESR峰，可能会出现由于非平坦的传递函数。出版社：AIP Publishing
We describe the measurement and successful compensation of the radio-frequency transfer function of a scanning tunneling microscope over a wide frequency range (15.5-35.5 GHz) and with high dynamic range (>50 dB). The precise compensation of cabling resonances and attenuations is critical for the production of constant-voltage frequency sweeps for electric-field driven electron spin resonance (ESR) experiments. We also demonstrate that a well-calibrated tunnel junction voltage is necessary to avoid spurious ESR peaks that can arise due to a non-flat transfer function. Published by AIP Publishing.