Coulomb blockade related to a localization effect in a single tunnel-junction/carbon-nanotube system
Coulomb blockade related to a localization effect in a single tunnel-junction/carbon-nanotube system
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库仑阻塞与单个隧道结/碳纳米管系统中的局域化效应有关
DOI：
10.1103/physrevb.63.073406
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发表时间：
2001
影响因子：
3.7
通讯作者：
Yuki Sato
中科院分区：
文献类型：
--
作者：
J. Haruyama;I. Takesue;T. Hasegawa;Yuki Sato
我们报道了由高阻抗外部电磁环境~EME引起的库仑阻塞！涉及单个隧道结/碳纳米管系统中的局部化效应。所观察到的库仑阻塞，由零偏置电导的线性温度依赖性支持，在数学上遵循相位相关理论，该理论解释了EME的作用，并意味着通过将能量转移到其EME来抑制电子的隧穿，其中总阻抗Zt（v）高于量子电阻。然而，我们的高Zt（v）与没有任何能量耗散的反定域效应强烈相关，但实际上有助于库仑阻塞，因为磁场对其相位调制也调制库仑阻塞。能量转移到如此高阻抗的电磁辐射中是否是库仑阻塞所必需的？
We report on Coulomb blockade caused by the high impedance external electromagnetic environment ~EME! related to a localization effect in a single tunnel-junction/carbon-nanotube system. Observed Coulomb blockade, supported by a linear temperature dependence of zero-bias conductance, mathematically follows phase correlation theory, which explains the roles of EME and implies that tunneling of electrons is suppressed by transferring the energy to its EME with a total impedance Zt(v) higher than quantum resistance. Our high Zt(v), however, is strongly associated with the antilocalization effect without any energy dissipation but actually contributes to Coulomb blockade, because its phase modulation by magnetic field modulates also Coulomb blockade. Is the energy transfer to such high impedance EME actually indispensable for Coulomb blockade?