Moo Hwan Kim

Pohang University of Science and Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Massoud Kaviany

University of Michigan–Ann Arbor

Ji Hoon Shim

Pohang University of Science and Technology

Changhoon Lee

Pohang University of Science and Technology

Bo Gyu Jang

Los Alamos National Laboratory

Hyoungchul Kim

Hongik University

Jong‐Soo Rhyee

Kyung Hee University

Hyo Seok Ji

Pohang University of Science and Technology

Seung Hyun

Pohang University of Science and Technology

Cooperative Institutions

Pohang University of Science and Technology

Kyung Hee University

Government of the Republic of Korea

Sungkyunkwan University

Center for High Pressure Science and Technology Advanced Research

Korea Research Institute of Standards and Science

University of Michigan–Ann Arbor

Korea Foundation for Max Planck POSTECH

Hannam University

Wonkwang University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Vacancy-suppressed lattice conductivity of high-ZTIn4Se3−x

Physical Review B (2013)

Hyo Seok Ji Hyoungchul Kim Changhoon Lee Jong‐Soo Rhyee Moo Hwan Kim

Anomalous, vacancy-induced anisotropic thermal conductivity is one of the important properties in the recently discovered high-$ZT$ In${}_{4}$Se${}_{3\ensuremath{-}x}$ compound. In this work, the lattice thermal conductivity of In${}_{4}$Se${}_{3\ensuremath{-}x}$ is investigated using equilibrium molecular dynamics simulation, the point-defect model, and ab initio calculations. The charge density distribution shows highly anisotropic structure with strong bonding along In-Se-In chain direction. Se vacancy strongly suppresses the phonon propagation along the chain direction, with little change in other directions. We show that suppressed long-range acoustic phonon transport caused by the vacancy results in anisotropic change of lattice conductivity. We suggest controlling of vacancy in intrinsic low-dimensional compounds is critical in achieving optimal lattice thermal conductivity and other thermoelectric properties.

Lattice (music)

10.1103/physrevb.87.125111

Cite

Citations (36)

Origin of f -orbital-bonding insensitivity to spin-orbit coupling in UO ₂

EPL (Europhysics Letters) (2015)

Bo Gyu Jang Seung Hyun Moo Hwan Kim Massoud Kaviany Ji Hoon Shim

The origin of negligible spin-orbit coupling effects on the ground-state properties of UO2 is examined using the LDA+DMFT and the LSDA+U methods.Although the previous theoretical results neglecting the spin-orbit coupling (SOC) are in reasonable agreement with experiments, this insensitivity has not been investigated.Via the charge density distribution, we show that the SOC does not affect the U-O bonding states which are directly related to the bonding properties (e.g., lattice constant, bulk modulus, and oxidation/reduction energies).

Spin–orbit interaction

Orbit (dynamics)

10.1209/0295-5075/112/17012

Cite

Citations (1)