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Quantum dark matter detection through the intersection of particle physics, chemistry and solid state physics

通过粒子物理、化学和固态物理的交叉检测量子暗物质

基本信息

批准号：
22K18712
负责人：
Melia Thomas
金额：
$ 4.16万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Challenging Research (Exploratory)
财政年份：
2022
资助国家：
日本
起止时间：
2022-06-30 至 2024-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22K18712/
关键词：
Dark Matter Particle Detector Single Molecule Magnet

项目摘要

The particle theory group (including PI Melia) is responsible for the theoretical calculations that identify particular single molecule magnets out of the 100s of possible choices that would be well suited to dark matter detection. We identified a number of possibilities, and importantly we identified a key parameter that acts as an indicator for the energy threshold. This parameter - a constant that determines the fastest possible magnetic relaxation time - is well documented for the synthesized single molecule magnets in the literature. We therefore were able to target of order ten crystals, with the properties chosen so that the energy threshold would sit on a sliding scale, with an eye to making future potential prototype particle detectors.The chemistry group (including Co-I Fukui) is responsible for the synthesis of single molecule magnets. The group selected single-molecule magnets focusing on the spin relaxation time, and synthesized single-molecule magnets containing manganese ions. As a result, single crystals of two types of single-molecule magnets were successfully prepared.The condensed matter group (including Co-I Mizukami) is responsible for the heat capacity measurement on crystals of single molecule magnets synthesized by the chemistry group. They have been provided several single-crystalline samples of Mn-based compounds, and determined the temperature dependence of specific heat in magnetic fields.

粒子理论小组(包括Pi Melia)负责理论计算，从100种可能的选择中识别出非常适合暗物质探测的特定单分子磁体。我们确定了许多可能性，重要的是，我们确定了一个关键参数，作为能量阈值的指标。这个参数--一个决定最快磁弛豫时间的常数--在文献中对合成单分子磁体有很好的记载。因此，我们能够以十级晶体为目标，其性质的选择使能量阈值处于可滑动的范围内，着眼于制造未来潜在的原型粒子探测器。化学小组(包括Co-I Fukui)负责单分子磁体的合成。该小组选择了专注于自旋弛豫时间的单分子磁体，并合成了含有锰离子的单分子磁体。因此，成功地制备了两种类型的单分子磁体的单晶。凝聚物组(包括Co-I水上)负责测量由化学组合成的单分子磁体的晶体的热容。给他们提供了几个锰基化合物的单晶样品，并测定了磁场中比热的温度依赖关系。