The Quantum Matter and Devices Lab in the Center for Nanoscale Materials (CNM) enables comprehensive low-temperature science down to 10 mK with extensive magnetic, electrical and optical capabilities for characterization of a variety of quantum materials
Revealing the intricate quantum properties of matter often requires low temperatures to suppress thermal excitations from the environment. The CNM Quantum Matter and Devices Lab is equipped with a dilution refrigerator system for ultralow-temperature experiments down to 10 mK. The system features several unique capabilities including a vector superconductor magnet, multi-directional free-space optical accesses and an expedited sample-loading mechanism.
With a variety of pre-installed electronic, microwave and optical characterization lines, the system is designed for measuring a diverse array of quantum materials and devices, such as quantum liquids and solids, superconducting qubits and single-electron transistors. Moreover, we provide versatile characterization instruments, including an extremely high-frequency (up to 100 GHz) microwave network analyzer, a high-power UV-Vis-NIR tunable nanosecond laser, and the associated microwave and optical setups. Femtosecond laser spectroscopy integrated with millikelvin ultralow temperature is under development. The Lab makes possible hybrid quantum science where researchers integrate different kinds of quantum information systems to take advantage of each and thereby achieve what a single system cannot.
Two recent publications that benefited from this technology are:
- C. Liu, X. Yan, D. Jin, Y. Ma, H.-W. Hsiao, Y. Lin, T. M. Bretz-Sullivan, X. Zhou, J. Pearson, B. Fisher, J. S.l Jiang, W. Han, J.-M. Zuo, J. Wen, D. D. Fong, J. Sun, H. Zhou, A. Bhattacharya, “Two-dimensional superconductivity and anisotropic transport at KTaO3 (111) interfaces”, Science 371, 716-721 (2021). https://science.sciencemag.org/content/371/6530/716
- Y.-Y. Lyu, X. Zhou, Z.-L. Xiao, R. Fotovat, J. Xu, G. Basnet, Y.-L. Wang, D. Jin, R. Divan, H.-B. Wang, and W.-K. Kwok, “Non-Ohmic negative longitudinal magnetoresistance in a two-dimensional electron gas”, Phys. Rev. B 103, 035422 (2021). https://journals.aps.org/prb/abstract/10.1103/PhysRevB.103.035422