Study on Resonant Tunneling via Wannier-Stark States

它已经表明，Zener当前流动的p-i-n二极管可以被调制成Zener当前和Wannier-Stark国家之间的相互作用，当P-i-n二极管在其内部区域有一个超级晶格。在订购调查相互作用的详细情况时，我们将运输和光学测量作为能量带计算的良好结果。sample we have used are p-i-n diodes which contains a 15 periods of （GaAs）D26/（AlAs）D26/D2 superlattice in the intrisic region。对条件的衍生物进行了测量，以4.2 K展览为一系列峰值。光学测量（电反射法）表明，Wannier-Stark州的形成方式是在超拉丁美洲。这些结果清楚地表明，条件衍生物中的峰值在泽纳当前和Wannier-Stark国家之间的共振，我们在磁场下进行了运输测量。我们已经设法把山顶的位置转移到磁场上了。更多的研究是必要的，以澄清峰值转变的起源。

It has been pointed out that Zener current flowing a p-i-n diode can be modulated due to interaction between the Zener current and Wannier-Stark states, when the p-i-n diode has a superlattice in its intrinsic region. In order to investigate detail of the interaction, we carried out transport and optical measurements as well as energy band calculations. The sample we have used are p-i-n diodes which contains a 15periods of (GaAs)ィイD26ィエD2/(AlAs)ィイD26ィエD2 superlattice in the intrisic region. The derivative of conductance measured at 4.2 K exhibits a series of peaks. The optical measurements (electroreflectance method) have shown that the Wannier-Stark states are formed in the superlattice region. These results clearly indicates that the peaks in the derivative of conductance are due to the resonance between Zener current and Wannier-Stark states.Furthermore, we carried out transport measurements under magnetic field. We have fond out that the peaks show shift due to the magnetic field. More studies are necessary to clarify the origin of the peak shift.