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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/69262

    Title: 單電子偵測器原理及製作與二維電子氣量子點電荷傳輸行為
    Authors: 廖俊霖;Liao,Chun-Lin
    Contributors: 物理學系
    Keywords: 單電子偵測器;二維電子氣;single-electron device;2DEG
    Date: 2015-11-27
    Issue Date: 2016-01-05 17:47:19 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 在本論文中我們研究兩種奈米尺度的元件,分別為單電子元件(single-electron devices)以及量子尖端結構(QPC)之二維電子氣元件,本實驗的單電子元件是由單電子電晶體(single-electron transistor)與單電子箱(single-electron box)組成,二維電子氣元件則由國立清華大學陳正中教授實驗團隊所提供。
    ;In this thesis, we study two types of nanoscale electronic devices, single-electron devices and quantum point contact (QPC) formed in two-dimensional electron gas (2DEG). The system of single-electron devices we study is composed of a single-electron transistor (SET) and a single-electron box (SEB). The 2DEG devices are provided by Professor Jeng-Chung Chen research group in the National Tsing Hua University.
    In a SET, a central island connects to source and drain electrodes through two tunnel barriers. As the structure is made in nanoscale, charging energy is large, and Coulomb blockade effect should be pronounced. To perform the experiments, we placed the devices in a helium dilution refrigerator to reduce the thermal fluctuation effect. The current of SETs will be affected by surrounding electric potential. Therefore, by capacitively coupling a SET to a SEB, we can detect the charge tunneling events in the SEB by reading the current in the SET. In the thesis, we study all-aluminian and aluminian-palladium SETs, analyze fabrication process, parameter, and finally fabricate workable Single-Electron Devices.
    The 2DEG we study is formed in heterojunction between GaAs and AlGaAs, we succeed to form QPC and observe quantized conductance. The conductance of QPC is affected by surrounding electric potential and we utilize as a Charge sensor to observe the charge transport behavior in quantum dots .
    In this study, we successfully observe single electron tunneling events in both Single-Electron boxes and 2DEGs quantum dot by utilizing SETs and QPC , respectively , as charge sensors.
    Appears in Collections:[物理研究所] 博碩士論文

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