晶格振蕩 的英文怎麼說
中文拼音 [jīnggézhèndàng]
晶格振蕩
英文
lattice vibration-
Bias voltage, which are related to the superlattice structural paraments, the doped densities and the applied bias voltage. we have also investigated the characteristics of superlattice under hydrostatic pressure by simulations
超晶格的負微分電導區還導致出現固定偏壓下隨時間變化的電流自維持振蕩，振蕩產生的條件依賴于其結構參數，摻雜濃度和外加偏壓的大小。Firstly, i provide a brief review of the previous achievements and investigations on the low - dimensional quantum devices and semiconductor superlattice, in which some principal theories such as bloch oscillations, wannier - stark ladder, zener tunneling and related progress in experiments are introduced
首先綜述了過去三十年低維量子器件與半導體超晶格的發展與相關研究，介紹了bloch振蕩、 wannier - stark臺階、 zener隧穿等關鍵理論以及相關實驗方面的進展，並引入簡化模型：緊束縛模型與單帶模型。When the applied bias voltage is changed within positive slope regions of u - i curve, the domain boundary between the high and low electric field domains does not moved, and the size of electric field domains regions is also not altered, while the electric field strengths are adjusted
用模擬計算的方法研究了弱耦合摻雜gaaa / alas超晶格在時變電壓下的場疇機制和固定偏壓下電流自維持振蕩。在時變電壓下，一定摻雜的超晶格處于穩定的電場疇， u - i曲線呈現鋸齒狀波形。Since the concept of superlattice was proposed, vertical transport in superlattice has been investigated widely. the electric field domains and current self - oscillations which result from sequential resonant tunneling between different subbands of the superlattice are very significant phenomena. such kind of oscillation can be uesd to make tunable microwave oscillaors. in this thesis, low temperature transport problem, especially the formation of field domain and the condition of current self - oscillations in doped gaas / alas superlattice with weak coupling are investigated thoroughly and also by combining the macroscopic model with the microscopic one., the voltage - current characteristic and the current oscillation are simulated. the calculated result is nearly consistent with the experimental data
由超晶格中子能級之間的順序多阱共振隧穿引起的電場疇及電流自維持振蕩現象是其中的一個非常有意義的分支，該現象可用來製作電壓調諧微波振蕩器。本論文對弱耦合摻雜gaaa alas超晶格中的縱向輸運特別是針對低溫下的場疇的形成和固定偏壓下電流自維持振蕩產生的條件進行了深入的探討，並結合宏觀模型和微觀模型對超晶格在時變電壓作用下的電壓-電流特性以及固定偏壓作用下的電流特性進行了模擬計算。Quartz crystal controlled oscillators of assessed quality - sectional specification - qualification approval
經質量評估的石英晶體受控振蕩器.分規范.合格鑒定分享友人