Research

Research in Park Research Group is driven by fundamental curiosity, quantum technology, and an interdisciplinary vision for the future. We are questioners, explorers, and problem solvers. Our work is built on strong collaborations within the group, as well as with domestic and international colleagues.

Creating novel quantum materials & Discovering phases

We create our own small table-top experimental universe by fabricating quantum materials, where strong electronic interactions and topology can be controlled and explored.

• We design and engineer new layered heterostructures by exfoliating, twisting, cutting, stacking, and nanopatterning atomically thin materials.
• We nanofabricate these heterostructures into devices and perform quantum transport measurements at millikelvin temperatures to discover emergent phenomena, such as unconventional superconductivity and fractionalized particles.

Multidimensional investigation of emergent phenomena

Understanding complex phases of matter requires multidimensional investigation across different physically observable quantities.

• We creatively use layered materials not only as platforms for emergent physics, but also as quantum sensors that are seamlessly integrated into the system under study.
• We simultaneously probe transport, spectroscopic, and thermodynamic properties, including conductivity, chemical potential, entropy, magnetization, and density of states, within a single device.

Visualizing & controlling quantum phases

What is the microscopic origin and mechanism of the emergent phenomena we discover? Can these states be directly visualized and precisely controlled in situ at length scales smaller than individual atoms?

• We aim to build an unprecedented experimental platform that combines simultaneous mesoscopic and subatomic-scale measurement capabilities, fully compatible with state-of-the-art quantum devices.
• We visualize and control phases in our devices, ranging from emergent crystalline orders and exotic quasiparticles to future topological qubits.

Quantum matter to quantum technology

 We explore the interface between quantum materials and emerging device-based qubit technologies.

• We apply high-frequency techniques, such as RF reflectometry and ultrafast transport measurements, to probe quantum materials beyond the DC regime.
• We aim to develop 2D quantum material-based superconducting qubits, spin qubits, and potential topological qubits.

Equipments

Quantum transport

Oxford Instruments Triton 500 Dilution Refrigerator

  • 48 DC lines
  • 10 RF lines
  • 6 T magnet (6 – 1 – 1 vector magnet upgrade planned)

Oxford Instruments Teslatron

  • 48 DC lines
  • 2 RF lines
  • 8 T magnet
  • 1.5 K base temperature (he-3 probe upgrade planned)

Scanning probes

Modular-design vibration-free laboratory

Oxford Instruments KelvinoxMX 400 Dilution Refrigerator 

  • Scanning tunneling microscope head installed
  • 25 mK base temperature
  • 14 T magnet

Low-temperature Scanning Setup

  • Scanning tunneling microscope head installed
  • 4 K base temperature
  • 14 T magnet

Nanofabrication

Home-built transfer stage with laser patterning (building in progress)

Shared department & cleanroom facilities