condensed matter physics
describe electrical, magnetical, thermal behavior in solid through solid state
engineering, and mechanical engineering have been created now condensed matter
physics has role of indicator for future engineering magnetic material and semiconductor, high temp superconductor is major research topic in condensed
matter physics and it is pioneer of new material phase and major role for
understanding characteristic of material. and this knowledge used for future
Our first principal calculations are based on quantum dynamics, tight-binding model method
main research topics are Ge-Sb-Te series phase transition material and 2-d graphene like material.
Our study is topological phase of electronic and electronic structures and explore new material properties, fundamental physical theory, and applications based on them. recently we trying to understand amorphous-crystalline phase transition via atomic bonding and electronic structure.
Research for non perturbed electron dynamics for strong correlated material (Kim, ki-seok)
Magnetic, superconductor phase transition and high effective mass electron(up to Thousands of times) for low temp metal is really hard to understanded by perturbation method.
So our laboratory trying to find non perturbated methmetical calculation method for strong correlated electron-electron interaction.
The presently expected technique is a more generalized form that exists in a higher-order bending space, in which the existing Landau-Ginsberg theory, which understands the phase transition phenomenon, involves a strong interaction effect of electron.
We expected that Landau-Ginsberg theory, which describes Einstein's field equations which symmetry braking related phase transitions.
This mathematical structure is believed to be related to gauge-gravity duality, which is mostly studied in string theory at present.
Topological Quantum Matter Theory (Cho, Kil-young)
Quantum mechanical dynamics of electron in solid shows non classical phenomena.
Representative quantum mechanical phenomena is topological phase and anyon which can be used quantum computing.
Our laboratory uses quantum field theory and other computational methods to understand new topological material and anyon.
Moreover our research field reach the spin liquid, Fractional Quantum State, Quantum Chaos.
First-principles calculation of materials(Seung-Hoon Jhi)
We study and predict the property of condensed matters using the density functional theory and related computational methods. We calculate with extreme accuracy the atomic structure, electronic and optical properties, thermal and mechanical properties of solids and nanomaterials without resort to experimental or empirical inputs. We also develop machine-learning potentials using the dataset from first-principles calculations and use them for large-scale calculations such as the phase change of amorphous materials. We explore the topological property of electronic and phonon band structures, and investigate their angular momentum and Hall effect, which may be utilized for quantum sensing and computation.