Fullerene-based Conductors and Superconductors

富勒烯基导体和超导体

• 批准号: 9404755
• 负责人: Alex Zettl
• 金额: $ 21万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-15 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9404755&HistoricalAwards=false
• 关键词: Fullerene; based; Conductors; Superconductors

9404755 Zettl The electronic and thermal properties of fullerene-based materials, pure and alkali-doped carbon-60 and carbon-70, will be examined using various transport, structural, mechanical and tunneling measurements. Electron phonon coupling in the normal and superconducting states will be investigated through transport, tunneling, and isotopic replacement on both the alkali and carbon sites. Carrier concentration and possible correlation-induced localization effects will be explored using Hall measurements. High pressures will be applied to probe transport properties and superconductivity as a function of lattice constants and variable density of states. % % % % The properties of novel carbon materials formed from so called fullerenes will be explored using a variety of probes, including transport of electricity and heat through the materials at atmospheric and high pressures. The mechanical strength of the structures will be determined using elasticity measurements. Atoms of different masses (different isotopes) will be introduced in the structures to help understand the interactions between the electrons and the vibrations of the atoms. This interaction may be responsible for some of the materials being superconducting (zero electrical resistance). ***

小行星9404755 富勒烯基材料，纯的和碱掺杂的碳-60和碳-70的电子和热性质，将使用各种传输，结构，机械和隧道测量检查。 电子声子耦合在正常和超导状态将通过运输，隧道，和同位素置换碱和碳网站进行调查。 载流子浓度和可能的相关性引起的本地化效应将使用霍尔测量进行探讨。 高压将被应用于探测输运性质和超导性作为晶格常数和可变态密度的函数。 % % % % 将使用各种探针探索由所谓的富勒烯形成的新型碳材料的特性，包括在大气压和高压下通过材料传输电和热。 结构的机械强度将使用弹性测量来确定。 不同质量的原子（不同的同位素）将被引入结构中，以帮助理解电子和原子振动之间的相互作用。 这种相互作用可能是导致某些材料超导（零电阻）的原因。 ***