NTU's Center for Condensed Matter Sciences (CCMS) published its latest breakthrough research on one-dimensional oxide-interfacial charges in the internationally acclaimed scientific journal Nature Communications.

Led by associate research fellow Ming-Wen Chu and research fellow Jauyn Grace Lin, the study discovered that one-dimensional electrons occur from a misfit dislocation defect in two-dimensional interfacial charges. The paper, entitled "Condensation of Two-Dimensional Oxide-Interfacial Charges into One-Dimensional Electron Chains by the Misfit-Dislocation Strain Field" was accepted for publication on April 14 and is the first in its field to present such a discovery.

The achievements in the study of semiconductor technology are some of the most significant scientific breakthroughs of the 20th century. Ranging from semiconductor transistors and nano-integrated circuits, the technology of semiconductor interface has been extensively applied to electronic appliances and has had a widespread impact on our everyday lives. This success is attributed to the fact that, for the past 60 years, scientists have developed a controlled understanding of how strains and defects impact two-dimensional interfacial charges in semiconductor technology.

In 2002, the accidental discovery of the same interfacial charges in oxide-interfacial charges opened up new grounds for research on oxide interface in the field of condensed matter science. As a result, oxide electronics soon became a core subject of condensed matter physics, with priority placed on understanding how strains and crystal defects impact two-dimensional oxide-interfacial charges.

NTU's research showing two-dimensional-to-one-dimensional electronic condensation represents a novel electronic-inhomogeneity mechanism at oxide interfaces. In addition, its findings will surely motivate further studies of one-dimensional electron density in oxide heterostructures.

The study was a collaborative effort, including CCMS research fellow Jauyn Grace Lin, PhD student Shu-Ling Chen, and Prof. Jer-Ren Yang of the Department of Materials Science and Engineering. Initially launched by the former CCMS director, Prof. Cheng-Hsuan Chen, associate research fellow Ming-Wen Chu took on the project and PhD student Chin-Ping Chang served as first author of the research paper.