High density and massive storage are key bottlenecks in the development of information technology and digital economy in the era of big data. Song Zhitang and Zhu Min from the Shanghai Institute of Microsystems and Information Technology of the Chinese Academy of Sciences invented a new type of switch device based on the interface effect between the elemental tellurium and the titanium nitride electrode, giving full play to the unique advantages of high melting crystallization speed and low power consumption of tellurium in the nanoscale two-dimensional restrictive structure. The “on” tellurium is in the melting state and is a metalloid, forming ohmic contact with the titanium nitride electrode, providing a strong current drive capability. The “off” semiconductor elemental tellurium and the titanium nitride electrode form a Schottky barrier, completely clamping the current. This new type of switching device for crystal liquid transformation has a simple composition and can overcome the problem of component segregation caused by the complex composition of bidirectional threshold switches (OTS); The process is compatible with CMOS and can be extremely miniaturized, making it easy to achieve massive 3D integration; The comprehensive performance of the switch is excellent, with a driving current of 11MA/cm2 and a fatigue life> 108 times, switching speed~15ns, especially when tellurium atoms are not lost, the switching life can be greatly improved. This study provides a new technological solution for the development of massive storage and near storage computing.
7. Realizing Quantum Coherence Synthesis of Ultra Cold Triatomic Molecules
By utilizing highly controllable supercooled molecules to simulate complex and difficult to calculate chemical reactions, precise and comprehensive research can be conducted on complex systems. Since the Deborah Jin research group at the University of Colorado synthesized potassium diatomic molecules from ultracold atomic gas in 2003, various ultracold diatomic molecules have been prepared in other laboratories and widely used in ultracold chemistry and quantum simulation research. The energy level structure of a three atom molecule is theoretically difficult to calculate, and experimental manipulation is also extremely difficult. Therefore, preparing ultra cold three atom molecules has always been a huge challenge in experiments. The team of Pan Jianwei and Zhao Bo from the University of Science and Technology of China and the team of Bai Chunli from the Institute of Chemistry of the Chinese Academy of Sciences cooperated to coherently synthesize ultracold triatomic molecules for the first time using radio frequency synthesis technology near the molecule atom Feshbach resonance in the mixture of sodium potassium ground state molecules and potassium atoms. This study opens up new directions for the study of supercooled chemistry and quantum simulation.
