Theoretical studies of Novel Order in Correlated Electron Materials

相关电子材料新秩序的理论研究

• 批准号: 0906655
• 负责人: Daniel Agterberg
• 金额: $ 24万
• 依托单位: University of Wisconsin-Milwaukee
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0906655&HistoricalAwards=false
• 关键词: Theoretical; studies; Novel; Order; Correlated

TECHNICAL SUMMARYThis award supports theoretical research and education that is motivated by experiments on unconventional superconducting materials. Superconductivity in close proximity to checkerboard charge density wave order and spin density wave order has been discovered in the underdoped cuprates; an unusual pair density wave superconductivity has been found in organic superconductors, in a cerium-cobalt-indium heavy fermion material, and also in a lanthanum cuprate material; superconductivity has been found at oxide interfaces; unexplained and puzzling physics has appeared in some Kondo lattice materials, all materials without parity symmetry. Unconventional superconductivity has been discovered in close proximity to a variety of quantum phase transitions.This research project focuses on the appearance of novel order in such materials. The PI aims to develop a new theoretical framework for pair density wave superconductors and their interplay with charge density wave and spin density wave order. The PI will further examine the appearance of new phases arising from fluctuations in pair density wave superconductors. He will examine the role of interactions in broken inversion materials applied to both bulk materials and to oxide interfaces. Theories describing the interplay between high-field quantum critical points and superconductivity with applications to specific heavy fermion materials will be developed.This project provides educational experiences for graduate and undergraduate students and contributes to the PI?s participation in the Research Experiences for Teachers program at the University of Wisconsin ? Milwaukee and his public presentations on condensed matter physics. The PI aims to broaden participation through involving underrepresented groups in the research. NON-TECHNICAL SUMMARYThis award supports theoretical research and education that is motivated by experiments on specific materials that exhibit unusual superconducting states. Superconductivity is a cooperative electronic state of matter with remarkable properties. Among them is the ability to carry electric current without dissipation. The PI aims to develop a theoretical framework for classes of materials that show unusual superconducting states, often when superconductivity competes with magnetism or some other way electrons can spontaneously organize themselves in an ordered way. A deeper understanding of superconductivity may lead to the discovery of new superconducting materials that may be practical for dissipationless electric power transmission or novel electronic device applications. This project provides educational experiences for graduate and undergraduate students and contributes to the PI?s participation in the Research Experiences for Teachers program at the University of Wisconsin ? Milwaukee and his public presentations on condensed matter physics. The PI aims to broaden participation through involving underrepresented groups in the research.

该奖项支持由非常规超导材料实验推动的理论研究和教育。在欠掺杂铜酸盐中发现了接近棋盘电荷密度波序和自旋密度波序的超导性；在有机超导体、铈钴铟重费米子材料和镧铜材料中发现了一种不寻常的对密度波超导性；在氧化物界面处发现了超导性；一些近藤晶格材料中出现了无法解释和令人费解的物理现象，所有材料都没有宇称对称。在各种量子相变附近发现了非常规的超导性。本研究项目的重点是研究这些材料中新秩序的出现。PI旨在为对密度波超导体及其与电荷密度波和自旋密度波序的相互作用建立一个新的理论框架。PI将进一步研究由对密度波超导体波动引起的新相的出现。他将研究应用于大块材料和氧化物界面的破碎反转材料中的相互作用。将发展描述高场量子临界点与超导性之间相互作用的理论，并将其应用于特定的重费米子材料。该项目为研究生和本科生提供了教育经验，并为PI？她参加了威斯康星大学的教师研究经验项目？密尔沃基和他关于凝聚态物理的公开演讲。PI旨在通过让代表性不足的群体参与研究来扩大参与。该奖项支持理论研究和教育，这些研究和教育是由对表现出不寻常超导状态的特定材料的实验所激发的。超导是物质的一种协同电子态，具有显著的性质。其中之一是承载电流而不耗散的能力。PI的目标是为表现出不同寻常的超导状态的材料类别开发一个理论框架，通常是当超导性与磁性或其他方式竞争时，电子可以自发地以有序的方式组织自己。对超导的深入了解可能会导致新的超导材料的发现，这些材料可能在无耗散电力传输或新型电子设备应用中具有实际意义。该项目为研究生和本科生提供了教育经验，并为PI？她参加了威斯康星大学的教师研究经验项目？密尔沃基和他关于凝聚态物理的公开演讲。PI旨在通过让代表性不足的群体参与研究来扩大参与。