2020同步年報

T he discovery of emergent quantum materials has revolutionized the physics of low-dimensional systems and led to new nanoscale device applications. In this year’s section on Physics and Materials Science, benefiting from the superb physical properties of novel materials, we re- port novel studies that provide deep insight into various materials with the potential to build electronic devices for quantum computing. This section includes reports on transition-metal dichalcogenides (TMD) with novel func- tional heterojunctions that can be a new candidate mate- rial for building spintronic devices, and a new combination of heteroepitaxial Pr 0.5 Ca 0.5 MnO 3 /SrTiO 3 films grown on F-mica that exhibit atypical colossal magnetoresistance (CMR) with mechanical modulation. In addition, a complete picture of the quantum-size effect (QSE) with a new class of size effects reports on nanoscale transport in systems with metallic surface states, typical of topological materi- als. Another fascinating example included in this section discusses precisely controlled kinetics of crystallization in a benchmark FAPbI 3 -based perovskite material that is used to make solar cells with enhanced efficiency, more than 23%. These results exhibit not only valuable insights into atypical physical properties but also provide opportunities for their applications in electronic devices. (by Ashish Atma Chainani and Cheng-Maw Cheng) Physics and Materials Science