Seoul National Univ. DMSE


Jang, Hyejin
Assistant professor
  • 2019

    Ph.D.: University of Illinois at Urbana-Champaign, Department of Materials Science and Engineering

  • 2011

    M.S.: Seoul National University, Department of Materials Science and Engineering

  • 2009

    B.S.: Seoul National University, Department of Materials Science and Engineering

  • 2020-present

    Professor, Seoul National University

  • 2019-2020

    Postdoctoral Researcher, Department of Electrical Engineering and Computer Sciences, University of California, Berkeley

  • 2011-2014

    Assistant Consultant, Entrue Consulting, LG CNS

Research Interests
1. Thermal transport properties of materials
- Thermal conductivity of various materials (e.g., metals, inroganic, organic materials, composites)

- Thermal management of small electronics

2. Thermally-induced charge and spin dynamics
- Ultrafast spin dynamics in magnetic memory

- Nonequilibrium carrier dynamics in optoelectronic devices

3. Advanced metrology
- Time-domain thermoreflectance

- Time-resolved magneto-optic Kerr effect
Selected Publications
1. Papers
*Nonequilibrium Heat Transport in Pt and Ru Probed by an Ultrathin Co Thermometer, Phys. Rev. B, 101, 064304 (2020)

*Thermal Conductivity of Oxide Tunnel Barriers in Magnetic Tunnel Junctions Measured by Ultrafast Thermoreflectance and Magneto-optic Kerr Effect Thermometry, Phys. Rev. Appl. 13, 024007 (2020)

*3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide, Adv. Mater., 29, 1700650 (2017)

Lab Overview
We study transport of heat, charge, and spin in materials by using light-matter interactions. In materials, heat is carried by all types of thermal excitations, e.g., phonons, electrons, magnons. We pursue fundamental understanding of heat transport by microscopic carriers and seek to answer the following questions: How can we tailor microscopic heat carriers to obtain desired macroscopic properties? How can we utilize heat to enhance device operations? How can we develop experimental techniques that can lead to important scientific discovery?