Mapping a non-linear Luttinger Liquid using 1D-2D magnetotunelling spectroscopy

使用 1D-2D 磁隧道光谱绘制非线性 Luttinger 液体

• 批准号: 1948695
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1948695
• 关键词: Mapping; non; linear; Luttinger; Liquid

One-dimensional (1D) systems behave in a significantly different way from their higher-dimensional counterparts as electron-electron interactions can now no longer be neglected. The Tomonaga-Luttinger Liquid (TLL) model is a theory that describes such systems. This model makes a number of predictions, such as spin-charge separation and suppression of tunnelling conductance at zero bias, both of which have been experimentally observed. It makes however some simplifications, such as assuming 1D systems of infinite length and only considering low-energy excitations.Recent theoretical work has focused on extending the TLL theory to include higher energy excitations and finite length systems. This led to the prediction that, at higher order excitations, 'replica' parabolas with higher momenta should be observed, in addition to the simple single-particle parabolic dispersion. My work focuses on the experimental detection and quantification of these higher order excitations using the method of 1D-2D tunnelling spectroscopy in order to map the dispersion of the system. In addition, we are also interested in measuring the temperature dependence of tunnelling at zero bias and at other interesting features as well as observing asymmetric current flow (i.e. charge fractionalisation) in 1D wires.

一维（1D）系统的行为与高维系统的行为有很大的不同，因为电子-电子相互作用现在不能再被忽略了。Tomonaga-Luttinger液体（TLL）模型是描述这种系统的理论。这个模型作出了一些预测，如自旋-电荷分离和抑制隧穿电导在零偏压，这两个都已被实验观察到。然而，它做了一些简化，如假设一维系统的无限长，只考虑低能量excitations.Recent的理论工作集中在扩展TLL理论，包括更高的能量激发和有限长的系统。这导致的预测，在高阶激发，“副本”抛物线与更高的动量应观察到，除了简单的单粒子抛物线色散。我的工作重点是实验检测和量化这些高阶激发使用的方法的1D-2D隧道光谱，以映射系统的色散。此外，我们也有兴趣在零偏压和其他有趣的功能，以及观察不对称的电流流动（即电荷分馏）在一维导线测量隧道的温度依赖性。

项目成果

Microscopic metallic air-bridge arrays for connecting quantum devices

用于连接量子器件的微观金属空气桥阵列

• DOI: 10.1063/5.0045557
• 发表时间: 2021
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Jin Y

Encyclopedia of Condensed Matter Physics

凝聚态物理百科全书

• DOI: 10.1016/b978-0-323-90800-9.00157-8
• 发表时间: 2024
• 作者: Vianez P

Decoupling of the many-body effects from the electron mass in GaAs by means of reduced dimensionality

通过降维解耦 GaAs 中电子质量的多体效应

• DOI: 10.1103/physrevb.107.115128
• 发表时间: 2023
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Vianez P

Observing separate spin and charge Fermi seas in a strongly correlated one-dimensional conductor.

观察强相关一维导体中单独的自旋和电荷费米海。

• DOI: 10.17863/cam.85670
• 发表时间: 2022
• 作者: Vianez P

Semiconductor nanodevices as a probe of strong electron correlations

• DOI: 10.1016/b978-0-12-822083-2.00007-1
• 发表时间: 2021-05
• 期刊: Semiconductor Nanodevices
• 作者: P. Vianez;O. Tsyplyatyev;C. Ford