外加电压

• However , when the applied bias voltage is located within negative slope regions of u - i curve , the superlattice will undergo a very fast dynamic process , changing from one stable state to another stable state . the superlattice exhibits temporal current oscillations in the negative differential conductivity region at fixed d . c
  当外加电压使电流处于正微分电导区变动时，超晶格的高低电场畴之间的畴边界不发生移动，只是相应的电场强度作些调整；当外加电压使电流处于负阻区域时，超晶格将经历一个稳态到另外一个稳态的动力学转变。