Ultra-low-noise transimpedance amplifier with a single HEMT in pre-amplifier for measuring shot noise in cryogenic STM

• 作者： 梁迎新 ( 1 ) ;
• 作者单位： 1.安阳师范学院物理与电气工程学院;
• 提交时间：2022-12-29

英文摘要:In this work, a design of transimpedance amplifier (TIA) for cryogenic scanning tunneling microscope (CryoSTM) is proposed. The TIA with the tip-sample component in CryoSTM is called as CryoSTM-TIA. With transimpedance gain of 1 Gohm, the bandwidth of the CryoSTM-TIA is larger than 300 kHz. The distinctive feature of the proposed CryoSTM-TIA is that its pre-amplifier is made of a single cryogenic high electron mobility transistor (HEMT), so the apparatus equivalent input noise current power spectral density at 100 kHz is lower than 4 (fA)2/Hz. In addition, bias-cooling method can be used to in-situ control the density of the frozen DX- centers in the HEMT doping area, changing its structure to reduce the device noises. With this apparatus, fast scanning tunneling spectra measurements with high-energy-resolution are capable to be performed. And, it is capable to measure scanning tunneling shot noise spectra (STSNS) at the atomic scale for various quantum systems, even if the shot noise is very low. It provides a powerful tool to investigate novel quantum states by measuring STSNS, such as detecting the existence of Majorana bound states in the topological quantum systems.

• 来自： 梁迎新
• 分类： 工程与技术科学 >> 物理学相关工程与技术 工程与技术科学 >> 仪器仪表技术 电子与通信技术 >> 电子技术 物理学 >> 交叉学科物理及相关领域的科学与技术
• 说明： 改论文被期刊要求做major revision。由于做major revision需要较长时间，作者希望大家能够知晓该论文中的电路设计和电路装置的特殊用途曾在该论文中被提出过。
• 投稿状态： 正在评审中
• 引用： ChinaXiv:202212.00178 (或此版本 ChinaXiv:202212.00178V3)
  (DOI:10.12074/202212.00178V3)
  (CSTR:32003.36.ChinaXiv.202212.00178.V1)
• 推荐引用方式：梁迎新.(2022).Ultra-low-noise transimpedance amplifier with a single HEMT in pre-amplifier for measuring shot noise in cryogenic STM.CSTR:32003.36.ChinaXiv.202212.00178.V3 (点此复制)