Zero-Point Vacancies and Magnetic Surface Effects in Materials at Low Temperature

将利用在以前的授权期内开发的磁性技术来研究量子固体中的零点空位效应。零点空位效应的测量是基于最近的证据，即磁极化子可能在固体3He的基态空位周围形成。将通过测量磁化强度和压力作为密度、外加磁场、温度、杂质浓度和样品几何形状的函数来寻求定量结果。结果将被分析，并与消除了现有极化子模型的一些缺陷的理论计算以及基于改进的顺磁相极化子稳定性标准的预测进行比较。

A study of zero-point vacancy effects in quantum solids using magnetic techniques developed under previous grant periods will be made. Measurements of zero-point vacancy effects are based on recent evidence that magnetic polarons may form around ground state vacancies in solid 3He. Quantitative results will be sought through measurements of magnetization and pressure as functions of density, applied magnetic field, temperature, impurity concentration, and sample geometry. The results will be analyzed and compared with theoretical calculations that remove some deficiencies of existing polaron models and with predictions based on improved stability criteria of polarons in the paramagnetic phase.