Quantum Materials in High Magnetic Fields

超导材料是一种激发态量子系统，在这种系统中，电流以极高的电流密度无电阻地流动。此外，在超导线圈中产生的磁场是巨大的，可以持续很长时间，并且由于它们的相位相干性，可以在小的结上产生超电流。由于其令人难以置信的特性，超导体使能源产生、传输和存储、医疗保健、运输、量子计算机和强大的未来电机等新技术成为可能。因此，理解具有改进性质的复杂超导量子材料在液氮温度下工作需要详细了解其电子相，这些电子相促进了电子配对和超导性在各种实验条件下的稳定性。该项目将探索新型超导材料中超导和正常电子状态的基本行为，以了解超导相稳定性的关键因素。为了构建超导相图，确定临界电流并建立相关的电子特性，我们将使用不同的实验技术在低温和高磁场下探索输运和热力学性质。该项目将探索超导及其竞争电子相的可调性，在高质量的单晶和薄片器件中使用施加应变。量子行为的特征将通过在非常高的磁场中的量子振荡来探索。这些研究对于提供一个完整的新型超导体的基本特征，以发展现实的理论模型和促进未来应用的发展至关重要。实验将在牛津大学进行，使用牛津应用超导中心和高磁场设施的设备，以及在欧洲和美国的国际高磁场实验室进行。额外的测量将与牛津仪器纳米科学合作进行，以改善公司的仪器范围。

Superconducting materials are exciting quantum systems in which electrical current flows without resistance with extreme current densities. Additionally, magnetic fields created in superconducting coils are huge and can persist for long periods and a supercurrent can be created across small junctions due their phase coherence. Due to their incredible properties, superconductors enable novel technologies from energy generation, transmission and storage, healthcare, transport, quantum computers and powerful motors of the future. Thus, understanding complex superconducting quantum materials with improved properties to operate at liquid nitrogen temperatures requires a detailed knowledge of their electronic phases that promote the pairing of electrons and the stability of superconductivity to various experimental conditions. This project will explore the fundamental behaviour of superconducting and normal electronic states in novel superconducting materials in order to understand the key ingredients responsible for the stability of the superconducting phases. We will explore the transport and thermodynamic properties using different experimental techniques at low temperature and high magnetic fields in order to construct superconducting phase diagrams, to determine critical currents and to establish the relevant electronic properties. The project will explore the tunability of the superconducting and its competing electronic phases using applied strain in high quality single crystals and thin flake devices. The signatures of quantum behaviour will be explored via quantum oscillations in very high magnetic fields. These studies are essential to provide a complete fundamental characterization of novel superconductors in order to develop realistic theoretical models and enable the development of future applications.The experiments will be performed both in Oxford, using the facilities of the Oxford Centre for Applied Superconductivity and high-magnetic field facilities, as well as at international high-magnetic field laboratories in Europe and USA. Additional measurements will be carried out in collaboration with Oxford Instruments Nanoscience, with a view to improving the company's range of instruments.