Long-Qing Chen

About

Long-Qing Chen is the Donald W. Hamer Professor of Materials Science and Engineering, as well as a Professor of Engineering Science and Mechanics and Mathematics at Pennsylvania State University. He received his B.S. in Materials Science and Engineering from Zhejiang University in China in 1982, followed by an M.S. from the State University of New York at Stony Brook in 1985, and a Ph.D. from MIT in 1990. His research focuses on the development and application of mesoscale phase-field models to understand and design structural, functional, multiferroic heterostructures, polymer composites, and energy materials. He specializes in analytical thermodynamic and kinetic theories of phase transitions, interfaces, and microstructures, and in multiscale models that integrate atomistic calculations with phase-field methods to predict microstructure evolution during various materials processes. Dr. Chen has made significant contributions to the understanding of microstructure evolution during phase transformations, grain growth, ferroelectric and multiferroic domain switching, and coupled electronic and structural transitions in functional and quantum materials. He is the director of the DOE CMS Center for Computational Mesoscale Materials Science and the founding Editor-in-Chief of npj Computational Materials. With over 1,000 publications and more than 107,000 citations, his work has had a profound impact on the field of computational materials science. He has also authored a…

Research topics

• Materials science
• Condensed matter physics
• Optoelectronics
• Physics
• Composite material
• Computer Science
• Quantum mechanics
• Optics
• Thermodynamics
• Chemistry

Selected publications

• Ultrahigh energy storage in superparaelectric relaxor ferroelectrics

  Science · 2021 · 746 citations

  Electrostatic energy storage technology based on dielectrics is fundamental to advanced electronics and high-power electrical systems. Recently, relaxor ferroelectrics characterized by nanodomains have shown great promise as dielectrics with high energy density and high efficiency. We demonstrate substantial enhancements of energy storage properties in relaxor ferroelectric films with a superparaelectric design. The nanodomains are scaled down to polar clusters of several unit cells so that pola…

  DOI

• Transparent ferroelectric crystals with ultrahigh piezoelectricity

  Nature · 2020 · 645 citations

  DOI

• Local negative permittivity and topological phase transition in polar skyrmions

  Nature Materials · 2020 · 196 citations

  DOI

• Structural Insight in the Interfacial Effect in Ferroelectric Polymer Nanocomposites

  Advanced Materials · 2020 · 143 citations

  Both experimental results and theoretical models suggest the decisive role of the filler-matrix interfaces on the dielectric, piezoelectric, pyroelectric, and electrocaloric properties of ferroelectric polymer nanocomposites. However, there remains a lack of direct structural evidence to support the so-called interfacial effect in dielectric nanocomposites. Here, a chemical mapping of the interfacial coupling between the nanofiller and the polymer matrix in ferroelectric polymer nanocomposites b…

  DOI

• Subterahertz collective dynamics of polar vortices.

  Nature · 2021 · 136 citations

  The collective dynamics of topological structures1-6 are of interest from both fundamental and applied perspectives. For example, studies of dynamical properties of magnetic vortices and skyrmions3,4 have not only deepened our understanding of many-body physics but also offered potential applications in data processing and storage7. Topological structures constructed from electrical polarization, rather than electron spin, have recently been realized in ferroelectric superlattices5,6, and these…

  DOI

Recent grants

• Phase-field Modeling of Flexoelectric Contributions to Ferroelectricity

  NSF · $315k · 2014–2018

• NIRT: Strain-Enhanced Nanoscale Ferroelectrics

  NSF · $1.4M · 2005–2011

• Microstructure Evolution in Solids with External Constraints and Defects

  NSF · $270k · 2001–2006

Frequent coauthors

• Yulan Li

  192 shared

• Ce‐Wen Nan

  State Key Laboratory of New Ceramics and Fine Processing

  192 shared

• Darrell G. Schlom

  Leibniz Institute for Crystal Growth

  168 shared

• Zi‐Kui Liu

  Pennsylvania State University

  128 shared

• Jia‐Mian Hu

  124 shared

• R. Ramesh

  121 shared

• Xiaoqing Pan

  University of California, Irvine

  115 shared

• Venkatraman Gopalan

  113 shared

Education

• Postdoc with Armen G. Khachaturyan, Materials Science and Engineering

  Rutgers University

  1992

• Ph.D., Materials Science and Engineering

  Massachusetts Institute of Technology

  1990

• M.S., Materials Science and Engineering

  Stony Brook University

  1985

• B.S., Materials Science and Engineering

  Zhejiang University

  1982

Awards & honors

• Fellow of the Canadian Academy of Engineering
• Member of European Academy of Sciences and Arts
• NSF Career Awards
• American Ceramic Society Coble Award
• IEEE Ferroelectric Young Investigator Award

Similar researchers at Pennsylvania State University

• Ralph Colbyh-82
• Tarasankar DebRoyh-81