CAREER: Photoemission Spectroscopy of Thin Films : A New Laboratory for Studying Quantum Many-Body Interactions

非技术性摘要：该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)资助的。这项由该职业奖资助的研究将探索人工工程材料中物质的奇异状态。特别是，这个项目将研究量子相互作用和导致这些材料独特性质的机制，包括超导、磁阻和相变。这些特性在能源输送和电子应用方面具有巨大的实用价值，尽管这种潜力在很大程度上仍未被开发。这是由于目前对管理这些房产的微观机制缺乏了解，这一职业项目将直接解决这一问题。认识到这些材料在与能源相关的应用中的重要性，这个职业奖的教育部分将强调材料物理在能源储存、转换和运输中的重要性。教育和研究将通过REU计划的研究项目以及康奈尔大学的本科生在本科生层面上紧密结合。此外，还将开发一个强调发电和转换物理的新生模块。该奖项还将支持一项外展计划，该计划的中心是在伊萨卡科学中心为公众开发一个关于能源和材料的展览。该奖项得到了材料研究部和物理部的支持。技术摘要：该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)资助的。这项由该职业奖资助的研究将探索人工工程材料中物质的奇异状态。特别是，本项目将利用角度分辨光电子能谱(ARPES)来研究分子束外延(MBE)生长的相关量子材料的外延薄膜中的量子多体相互作用。这些体系包括氧化物异质结(SrTiO_3/LaAl_3)中形成的新型二维电子气(2DEG)、超导电性、锰氧化物中的巨磁电阻(La_2MnO_4)以及金属-绝缘体转变(EuO，V_2O_3)。利用分子束外延合成的材料将允许对异质结构、纳米结构和材料在外延应变影响下的独特研究。该职业奖的教育部分将强调这种材料在能源储存、转换和运输应用中的重要性。教育和研究将通过REU计划的研究项目以及康奈尔大学的本科生在本科生层面上紧密结合。此外，还将开发一个强调发电和转换物理的新生模块。该奖项还将支持一项外展计划，该计划的中心是在伊萨卡科学中心为公众开发一个关于能源和材料的展览。该奖项得到了材料研究部和物理部的支持。

NON-TECHNICAL ABSTRACT :This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The research funded by this CAREER award will probe exotic states of matter in artificially engineered materials. In particular, this project will investigate the quantum interactions and mechanisms which give rise to the unique properties of these materials, which include superconductivity, magnetoresistance, and phase changes. These properties have enormous utility in energy delivery and electronic applications, although this potential remains largely untapped. This is due to the current lack of understanding of the microscopic mechanisms governing these properties, something that this CAREER project will directly address. Recognizing the importance of these materials in energy-related applications, the educational component of this CAREER award will emphasize the importance of materials physics in energy storage, conversion, and transport. Education and research will be tightly integrated at the undergraduate level through research projects through the REU program as well as by Cornell undergraduates. In addition, a freshman-level module emphasizing the physics of power generation and conversion will be developed. This award will also support an outreach program centered on developing an exhibit on energy and materials for the public at the Ithaca Sciencenter. This award is supported by the Division of Materials Research and the Division of Physics. TECHNICAL ABSTRACT : This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The research funded by this CAREER award will probe exotic states of matter in artificially engineered materials. In particular, this project will utilize angle-resolved photoemission spectroscopy (ARPES) to study quantum many-body interactions in epitaxial thin films of correlated quantum materials grown by molecular beam epitaxy (MBE). These systems include the novel two-dimensional electron gas (2DEG) formed in oxide heterostructures (SrTiO3 / LaAlO3), superconductivity, colossal magnetoresistance in the manganites (La2MnO4), and metal-insulator transitions (EuO, V2O3). Utilizing MBE-synthesized materials will allow for the unique studies of heterostructures, nanostructures, and materials under the influence of epitaxial strain. The educational component of this CAREER award will emphasize the importance of such materials in energy storage, conversion, and transport applications. Education and research will be tightly integrated at the undergraduate level through research projects through the REU program as well as by Cornell undergraduates. In addition, a freshman-level module emphasizing the physics of power generation and conversion will be developed. This award will also support an outreach program centered on developing an exhibit on energy and materials for the public at the Ithaca Sciencenter. This award is supported by the Division of Materials Research and the Division of Physics.