Nonequilibrium Fluctuation and Coulomb Correlation in Resonace Tunneling Processes.

共振隧道过程中的非平衡波动和库仑相关性。

• 批准号: 06640511
• 负责人: KAWAMURA Kiyoshi
• 金额: $ 1.34万
• 依托单位: Faculty of Science and Technology, Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06640511/
• 关键词: トンネル効果; 量子ドット; 電流電圧特性; フリデ-ル和則; クーロン相関; 近藤効果; フリーデル総和則; 帯電効果; 一電子トンネル効果; 雑音; クーロンブロッケイド; クーロン相互作用; ホール抵抗

The purpose of this project is to study current-voltage cahracteristics of quantum dots from quantum states of electrons within them.We succeeded in explaining experimental results of the Hall resisitance of elements with various shapes. Key issues of this study is our own method of computing the green function of electrons in the presence of a magnetic field.We propose a new device which exhibits a new function. This device consists of two quantum dots and an elctric current flowing in one quatum dot induces a current through another quatum dot against potential drop.We find a new type of Kondo effect. In contrast to the well known Kondo effect exhibited in a letter conductance due to the Kondo resonance, the nonlinear conductance depends on applied bias voltage in logarithmically singular manner.In addition, we extended the Friedel sum rule to investigate hysterisis in current-voltage characteristics, and experimental results have been clearly explained.Finally, we have started a research of transport phenomena of a quantum dot dimer because we believe the next phase of research of single electron device will be the study of coupled system of quantum dots.

该项目的目的是研究它们内部电子量子状态的量子点的电流 - 电压cahracteristical。这项研究的关键问题是我们自己在存在磁场的情况下计算电子绿色功能的方法。我们提出了一种展示新功能的新设备。该设备由两个量子点和一个流向一个Quatum Dot流动的左动电流组成，可诱导通过另一个Quatum Dot的电流，以防止潜在的滴度。我们找到一种新型的近核作用。与由于关系共振引起的字母电导中所表现出的众所周知的关系效应形成鲜明对比，非线性电导取决于以对数奇异的方式以对数奇异的方式以偏置的偏置电压。此外，我们扩展了弗里德尔总和规则以调查当前电压特征中的腹腔炎，并清楚地认为，我们已经清楚地求出了量子。单电子设备的下一阶段将是量子点耦合系统的研究。

项目成果

F.Yamaguchi and K.Kawamura: "Suppression of Current Noise due to the coulomb Correlation" Proceeding of NPMS '95. 116-118 (1996)

F.Yamaguchi 和 K.Kawamura：“库仑相关性对电流噪声的抑制”NPMS 95 论文集。

山口文子,山賀正人,川村清: "The Kondo Effect to Nonlinear Transport through a Quantum Dot" Journal of Magnetism and Magnetic Materials. 140-144. 1207-1208 (1995)

Ayako Yamaguchi、Masato Yamaga、Kiyoshi Kawamura：“通过量子点实现非线性传输的近藤效应”《磁性与磁性材料杂志》140-144 (1995)。

Fumiko Yamaguchi: "Sudden Drop of Dissipation in Field-Coupled Quantum Dot Transistors" Japanese Journal of Applied Physics. 34-2・1B. L105-L108 (1995)

Fumiko Yamaguchi：“场耦合量子点晶体管中的耗散突然下降”日本应用物理学杂志 34-2・1B (1995)。

Masato Yamaga: "In fluences of Internal Fields of Fast Modulation to the Kondo Effect21GC03:Journal of Physical Society of Japan" 64. 595-604 (1995)

Masato Yamaga：“快速调制内部场对近藤效应的影响21GC03：日本物理学会杂志”64. 595-604 (1995)

K.Amemiya and K.Kawamura: "Analysis of the Hall effect in terms of magnetic-forcusing." Journal of Physical Society of Japan. vol.64 no.2. 595-604 (1995)

K.Amemiya 和 K.Kawamura：“从磁力方面分析霍尔效应。”