研究生: |
林仕傑 |
---|---|
論文名稱: |
矽摻雜砷高壓相變之研究 Phase Transitions of Si:As Under High Pressure |
指導教授: | 林志明 |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
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論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 86 |
中文關鍵詞: | 相變 、矽 |
外文關鍵詞: | Phase Transition, silicon |
相關次數: | 點閱:1 下載:0 |
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利用X-ray繞射角度擴散分析法(Angular-dispersive X-ray diffraction, ADXD),研究摻雜砷的矽晶體在鑽石高壓砧(diamond-anvil cell, DAC)內之高壓相變行為(~30GPa)。兩組樣品分別為樣品一:電阻率0.001~0.004Ω-cm(濃度1.7 × 10^19~2.8 × 10^19cm-3)與樣品二:電阻率0.004Ω-cm(濃度1.7 × 10^19cm-3)。在類靜水壓的環境中對實驗樣品進行加壓與降壓的實驗。實驗結果顯示,在常溫下摻雜砷的矽之高壓相變為不可逆的過程,此不可逆的性質與純矽在常溫下之高壓相變行為相似。
Phase behavior of arsenic-doped silicon wafers in a diamond-anvil cell have been studied up to ~ 30 GPa by using in-situ Angular-dispersive X-ray diffraction (ADXD). Two samples are included: sample 1 with resistivity 0.001~0.004Ω-cm(1.7 × 10^19~2.8 × 10^19cm-3)and sample 2 with resistivity 0.004Ω-cm(1.7 × 10^19cm-3). For loading and unloading run under quasi-hydrostatic condition, it is found that arsenic-doped silicon undergo a unreversible phase transition at room temperature. The unreversibility in the present phase transition reveals that arsenic-doped silicon has also likely as pure silicon at room temperature.
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