Dilution refrigerator for milliKelvin electronic characterization of quantum materials
Abstract
Discovery and control of quantum electronic states in emerging materials, from two-dimensional crystals to topological superconductors, play a key role in many areas of DoD-relevant research. Of particular importance is the unambiguous detection of a novel class of robust electronic states in topological materials, which could be harnessed in devices to enable new forms of quantum information processing. Due to small energy scales that characterize these fragile states, low temperatures are required for their detection in the lab. To address this challenge, the proposed instrumentation will enable electronic characterization of quantum materials at ultra-low temperatures in the milliKelvin regime. The proposed equipment consists of a dilution refrigerator with two key features- (1) a rotating sample holder that enables measurements in tilted magnetic fields, thereby controlling the transition between topologically trivial and non-trivial regimes, and (2) a fast sample exchange feature that facilitates high-throughput sample characterization in order to accelerate the pace of research. By interfacing the dilution refrigerator with existing cryogenic infrastructure, the proposed setup will minimize costly helium consumption and expand the range of operation of existing facilities down to ultra-low temperatures. As a shared-use asset among multiple investigators, this setup will support active research currently funded by AFOSR, ARO, and DARPA and enhance research-related education for a cohort of graduate students and postdoctoral fellows.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502110130
Entities
People
- Monica Allen
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of California, San Diego