Enhanced Sensitivity NMR Studies of Nanostructured Electronic Materials and Education in Physical Chemistry

在这个由化学部实验物理化学项目资助的教师早期职业发展计划中，鲍尔斯将使用增强灵敏度的核磁共振波谱（NMR）研究纳米结构III-V半导体系统。超高灵敏度核磁共振技术将得到发展，包括固态光泵浦、自旋注入动态核极化和磁阻检测。将研究的一些例子包括掺杂络合键几何的结构研究，分数量子霍尔效应（FQHE）中skyrmions的检测，以及半导体合金（包括III-V氮化物）中有序和相域表征中复合费米子的准朗道能级结构和磁矩的确定。其中一些实验将在国家强磁场实验室（NHMFL）进行。教育计划将包括赞助NHMFL的本科生研究，发展计算机辅助化学教育和虚拟教室，以及扩展一个非常成功的核磁共振系列研讨会。该项目的一个目标是展示核磁共振的潜力，以提供关于纳米结构电子材料的新信息，这可能是任何其他分析测量都无法获得的。所有感兴趣的系统都具有新颖的器件应用，例如在各种类型的场效应晶体管和蓝光或紫外光二极管激光器中。这项职业补助金的教育部分将通过课堂教学、研讨会和在世界上最好的高磁场研究环境之一的实践研究，促进本科生和研究生对核磁共振波谱学的理解。

In this Faculty Early Career Development Program award funded by the Experimental Physical Chemistry Program of the Chemistry Division, Bowers will study nanostructured III-V semiconductor systems using enhanced sensitivity nuclear magnetic resonance spectroscopy (NMR). Ultrahigh sensitivity NMR techniques will be developed, including solid-state optical pumping, spin inject dynamic nuclear polarization, and magnetoresistance detection. Some of the examples that will be examined include structural studies of dopant complex bonding geometries, the detection of skyrmions in the fractional quantum Hall effect (FQHE), and the determination of quasi-Landau level structure and magnetic moments of composite Fermions in the characterization of ordering and phase domains in semiconductor alloys including the III-V nitrides. Some of these experiments will be conducted at the National High Magnetic Field Laboratory (NHMFL). The education plan will include sponsorship of undergraduate research at NHMFL, the development of computer-assisted chemical education and the virtual classroom, and expansion of a highly successful NMR seminar series. One goal of this project is to demonstrate the potential of NMR to provide new information about nanostructured electronic materials which may not be available by any other analytical measurement. All of the systems of interest have novel device applications, such as in various types of field effect transistors and in blue- or ultraviolet-light diode lasers. The educational part of this CAREER grant will promote an understanding of nuclear magnetic resonance spectroscopy for both undergraduate and graduate students through classroom work, seminars, and hands-on research in one of the world's best a settings for research with high magnetic fields.