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Speaker: Dr.Xiaoxing Cheng

Topic: Influence of defects on polarization in ferroelectrics: a phase-field study by Dr.Xiaoxing Cheng

Time & Date: on March 31 (Friday) 10:00-11:00 (Beijing Time)

Zoom Meeting:

https://cuhk-edu-cn.zoom.us/j/96295554527?pwd=cUpyZmkxaWZKOVc2M29QS1B2V3BOQT09

Zoom Meeting ID: 962 9555 4527

Password​：123456

Abstract:

Ferroelectric is a large group of functional materials that possesses outstanding ferroelectric, piezoelectric, dielectric properties, and a wide range of applications, such as capacitors, actuators, transducers, random access memories, waveguides, etc. One of the defining features of the ferroelectric materials is the appearance of a complex switchable spontaneous polarization domain structure, which determines their effective properties and enables a wide range of applications. In recent years, because of the growing demand for novel nanoelectronic devices, scientists have been working on nanoscale domain engineering, which means understanding and manipulating the polarization domain structures at the nanoscale, to search for potential answers to the next generation semiconductors from a materials science perspective. In this talk, I will discuss how defect engineering, particularly, dislocations in SrTiO3 and non-stoichiometric charged defects in BiFeO3, may contribute to the control of both local and long-range polarization distribution at nanoscale.

Biography:

Xiaoxing Cheng received the B.S. degree in Materials Science and Engineering from Shanghai Jiao Tong University in 2013, and the Ph.D. degree in Materials Science and Engineering from Penn State University in 2020. After graduation, he joined MuPRO LLC to be responsible for the development and commercialization of simulation software. His main work interests include phase field simulation of ferroelectric materials, parallel numerical computation software development and commercialization. His major achievements include the independent development of MuPRO desktop platform series software and the lead development of MuPRO server platform series software, with cumulative global sales exceeding $500,000 to date. He has published more than 30 academic papers with more than 900 citations in journals such as Nat Nanotechnol, Phys Rev Lett, Adv Mater, Adv Funct Mater, Sci Adv, Nano Lett, Phys Rev B, etc.