TUN-CNT · Studies of One-Dimensional Tunneling in Carbon Nanotubes
7РП — „Хора“ (Действия „Мария Кюри“)
- Период
- 2009-09-01 → 2013-08-31
- Финансиране от ЕС
- 100 000 €
- Участници
- 1
- Схема
- MC-IRG
Линиите свързват координатора с партньорите.
Накратко на български
Въглеродните нанотръби се използват за създаване на контролирани бариери, чрез които се проучва движението на единични електрони. Това помага за разбирането на фундаменталните състояния на електроните и микроскопичната структура на сложни интерфейси от оксиди.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Studies of One-Dimensional Tunneling in Carbon Nanotubes
This IRG grant focused on studying tunneling junctions in ultraclean nanotubes, and their effect on the physics of single electrons. The goal was to construct novel nanotube device architectures within which we can create controllable tunneling barriers along the tube and use these devices for various physical studies. This project was specifically suited for the reintegration grant since it allowed using the constructed devices in various research activities in the lab, thereby maximizing the transfer of knowledge to many PhD and master students that would otherwise work on separate areas. During this project we preformed few central physics studies with these devices. The first focused on the formation of a molecular state by two interacting electrons, a long sought fundamental ground state of these Fermions. The second involved developing a new nano assembly technology that allowed the creation of tunneling barriers of arbitrary complexity in long ultraclean nanotubes. Finally, we used these devices as scanning probes to study other systems – the complex oxides interfaces. We started with two works that studied the unusual transport properties of these devices. These were followed by a full-fledged imaging experiments that use our newly developed, nanotube based, scanning single electron transistor to unravel the microscopic structure of these interfaces. Overall, the activity in this grant helped establishing the core direction in our lab, and contributed significantly to the knowledge and expertise of a large number of new students that started their graduate studies with the establishment of the lab.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Quantum tunneling, the ability of electrons to pass through classically forbidden barriers, has been an invaluable tool in the studies of fundamental electronic properties in condensed-matter systems. The tunneling between two conductors reflects their density-of-states and the properties of their separating barrier and as such can be used to determine these quantities with large accuracy. In this work we will use tunneling experiments to study the fundamental properties of electrons in carbon nanotubes (NT). Here, two unique features make tunneling particularly intriguing – the relativistic-like dispersion of the electrons, and their one-dimensional confinement, which renders them into collective excitations. We will use novel NT device architectures that will allow us to create tunneling barriers of arbitrary shapes, to control the properties of the tunneling electrons and to reach the limit of ultra-clean NTs and ultra-strong interactions between electrons. These devices will be utilized to study a varied set of questions: To what extant can the tunneling in NTs be explained by single-particle Zener-like tunneling? Does the relativistic-like nature of electrons lead to Klein paradoxes in tunneling across a sharp barrier? What are the effects of electronic interactions in the tunneling? What are the roles of disorder and number of one-dimensional channels in the tunneling? Can we discover the recently predicted strongly-interacting spin-incoherent liquid of electrons, which is expected to have a unique tunneling signature? Finally, we would use tunneling experiments as a sensitive tool to study the nature of the yet poorly understood small band-gaps in carbon nanotubes. These studies will address for the first time some core questions about electrons in low-dimensions and will also determine the quantum limits for using NTs in electronic device applications.
Оригинален текст от CORDIS (на английски).
Участници
- WEIZMANN INSTITUTE OF SCIENCE · RehovotКоординаторИзраел
Връзки
Данни: CORDIS, © Европейски съюз