He3-He4 dilution refrigerator for temperatures below 0.3 K down to <50 mK with optical access and installed magnet coil

He3-He4 稀释制冷机，温度低于 0.3 K 低至 <50 mK，带光学通道和安装的磁体线圈

• 批准号: 427377618
• 金额: --
• 依托单位: Technische Universität Dortmund
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/427377618?language=en
• 关键词: He3; He4; dilution; refrigerator; temperatures

We apply for a dilution refrigerator with optical access for performing experiments at a base temperature below 50 mK. In addition, it shall be possible to apply high magnetic or/and electric fields. The system will be used to address a broad spectrum of scientific projects that would benefit from the ultralow temperatures such as (a) high resolution spectroscopy of excitonic fine structure; (b) study of collective phases such as polariton- or exciton condensates, (c) dynamics of carrier and spin systems in extended nanostructures; (d) nuclear spin systems expected to show collective phases at extreme cooling and their influence on the carrier spin dynamics; (e) correlated materials with phase transitions in the mK-temperature range, in particular spin liquids; as well as (f) ultrafast acoustics in the regime of a few phonons or a single phonon.

我们申请了一个具有光学访问的稀释冰箱，用于在低于50 mK的基础温度下进行实验。此外，应能够施加高磁场或/和电场。该系统将用于解决将受益于超低温的广泛科学项目，如（a）激子精细结构的高分辨率光谱学;（B）极化激子或激子凝聚物等集体相的研究，（c）扩展纳米结构中载流子和自旋系统的动力学;（d）预期在极端冷却时显示集体相的核自旋系统及其对载流子自旋动力学的影响;（e）在mK温度范围内具有相变的相关材料，特别是自旋液体;以及（f）在几个声子或单个声子的范围内的超快声学。