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邱學軍,呂強.Dirac-Weyl 半金屬結中電磁控制的克萊因隧穿和電荷電導[J].中南民族大學學報自然科學版,2019,(2):252-257
Dirac-Weyl 半金屬結中電磁控制的克萊因隧穿和電荷電導
The electric and magnetic-controlled Klein tunneling and charge conductance in Dirac-Weyl semimetal junction
  
DOI:10.12130/znmdzk.20190219
中文關鍵詞: Dirac-Weyl半金屬  克萊因隧穿  電勢壘  磁場  電荷電導
英文關鍵詞: Dirac-Weyl semimetal  Klein tunneling  electric potential barrier  magnetic field  charge conductance
基金項目:國家自然科學基金項目(11404411)
作者單位
邱學軍,呂強 中南民族大學 電子信息工程學院, 湖北省智能無線通信重點實驗室,武漢 430074 
摘要點擊次數: 185
全文下載次數: 172
中文摘要:
      從理論上研究了Dirac-Weyl 半金屬結中電磁控制的克萊因隧穿和電荷電導。研究發現,完美電子隧穿顯著依賴于電勢壘的大小、磁場幅度及其方向。當電勢壘接近費米能時,該結構顯示了明顯的波矢過濾特性。通過調節磁場幅度和方向,可以獲得任意入射角度的完美隧穿電子波矢?;陔娮拥耐干涓怕?,進一步計算了電勢壘和磁場幅度對電荷電導的影響,研究發現:通過選擇合適的電勢壘或磁場幅度,可以實現電子開關的功能。這些理論結果為設計基于Dirac-Weyl半金屬結中納米電子器件提供了基礎。
英文摘要:
      Electric and magnetic-controlled Klein tunneling and charge conductance in Dirac-Weyl semimetal junction are theoretically studied. It is found that the perfect electron tunneling is sensitive to the electric potential barrier, magnetic field magnitude and its direction. The structure shows obvious wave vector filtering behavior when the potential barrier is close to Fermi energy. Under the modulation of magnetic field magnitude and direction, a perfect electron tunneling wave vector of discretionary incident angle can be obtained. Based on the transmission probability, we further calculate the charge conductance under the effect of electric potential barrier and magnetic field, one electric switch is found to be feasible by choosing appropriate electric potential barrier and magnetic field. These theoretical results provide basics for designing nano-electronic devices based on Dirac-Weyl semimetal junction.
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