Research
RESEARCH OVERVIEW
The research in the Lab. for Advanced Materials and Extreme conditions (AMEX) at POSTECH has focused on design, growth and characterization of advanced low-dimensional materials with emergent quantum properties under extreme conditions.
Our research goals are (i) elucidation of the underlying microscopic mechanism for exotic ground states and transport properties of low dimensional electronic systems, (ii) understanding how to design new low dimensional materials with tailored topological properties, and (iii) discovery of new types of collective or topological quantum phenomena, which can possibly utilized for electronic devices with enhanced functional properties.
These research goals can be achieved by balancing the research activities for growing high-quality single crystals, investigation their physical properties under low temperature/high magnetic fields/high pressures, and fabrication of low-dimensional crystal-based devices.
From single crystal growth to device fabrication
To study novel physical properties of quantum materials, we have focused on growting high-quality single crystals using various growth methods, including flux growth, chemical/ physical vapor transport, and Bridgemann methods. Precise electronic and spintronic transport responses are determined for micro- or nano-fabricated single crystal devices using focused-ion beam and e-beam lithography techniques.
Multiple extreme conditions
To explore a wide range of physical parameter space, we have set up various facilities and developed techniques including a He3/He4 dilution fridge, a 20 T superconducting magnet and a diamond anvil cell, in collaboration with prof. W. Kang, prof. K. H. Kim, and prof. Y. J. Jo's groups. These efforts allow us to realize multiple extreme conditions with low temperatures, high magnetic fields, high pressure and high electric gating.