A lead-vacancy (PbV) center in diamond has been developed as a quantum emitter for large-scale quantum networks by researchers from Tokyo Tech. This innovative color center exhibits a sharp zero-phonon-line and emits photons with specific frequencies. The PbV color center stands out among other diamond color centers due to its ability to maintain optical properties at relatively high temperatures of 16 K. This makes it well-suited for transferring quantum information in large-scale quantum networks. Much like how electric circuits use components to control electronic signals, quantum netwo ..read more

Tokyo Medical and Dental University and Tokyo Institute of Technology will merge on October 1, 2024, to form Institute of Science Tokyo (Science Tokyo). The merging universities have created a special website, the Science Tokyo introductory website, which reveals the philosophy, logo, and other verbal and visual elements of the new university. Science Tokyo introductory website Science Tokyo's identity and brand are the result of a broad community effort that began with the Institute of Science Tokyo Brand Action! project in October 2023. To learn more about this process, check out the N ..read more

Oxide ion conductors used in solid-state fuel cells often fail to reach full potential when operating at temperatures below 500 ℃, but researchers from Tokyo Tech have recently found a solution to this problem. They demonstrated high conductivity and stability in bismuth-containing Sillén oxyhalides with triple fluorite-like layers (e.g. 10 mS/cm at 431 ℃; 204 times higher conductivity than that of conventional conductors at 310 ℃). Solid oxide fuel cells (SOFCs) are known for their high efficiency and improved safety compared to other types of fuel cells. One of the key factors in SOFC pe ..read more

SharpeRatio@k, a novel evaluation metric for Off-Policy Evaluation estimators, effectively measures the risk-return tradeoff of evaluating policies used in reinforcement learning and contextual bandits, which are typically ignored by conventional metrics, show scientists at Tokyo Tech. This novel metric, inspired from risk assessment in financial portfolio management, provides a more insightful evaluation of OPE, paving the way for improved policy selection. Reinforcement learning (RL) is a machine learning technique that trains software by mimicking the trial-and-error learning process of ..read more

A new hybrid layered perovskite featuring elusive spontaneous defect ordering has been found, report scientists at Tokyo Tech. By introducing specific concentrations of thiocyanate ions into FAPbI3 (FA = formamidinium), they observed that ordered columnar defects appeared in the stacked crystalline layers, taking up one-third of the lattice space. These findings could pave the way to an innovative strategy for adjusting the properties of hybrid perovskites, leading to practical advances in optoelectronics and energy generation. Perovskites are among the most extensively studied materials i ..read more

Machine learning (ML) enables the accurate and efficient computation of fundamental electronic properties of binary and ternary oxide surfaces, as shown by scientists from Tokyo Tech. Their ML-based model could be extended to other compounds and properties. The present research findings can aid in the screening of surface properties of materials as well as in the development of functional materials. The design and development of novel materials with superior properties demands a comprehensive analysis of their atomic and electronic structures. Electron energy parameters such as ionization ..read more

The Innovator and Inventor Development Platform (IIDP), an organization that provides Tokyo Tech's graduate-level students with career development education and support, hosted a two-part online career support seminar for international students in February. Approximately 40 percent of international students who complete their doctoral degrees at Tokyo Tech subsequently find employment in Japan. This figure exceeds the ratio of international students who find a job upon returning to their home countries or regions, according to fiscal year 2022 data. Some international students, however, ar ..read more

A novel method that employs palladium to inject hydrogen into the deeply buried oxide-metal electrode contacts of amorphous oxide semiconductors (AOSs) storage devices, which reduces contact resistance, has been developed by scientists at Tokyo Tech. This innovative method presents a valuable solution for addressing the contact issues of AOSs, paving the way for their application in next-generation storage devices and displays. Thin film transistors (TFTs) based on amorphous oxide semiconductors (AOSs) have garnered considerable attention for applications in next-generation storage devices ..read more

The Joint Meeting for Selection of Head of National University Corporation Institute of Science Tokyo (hereinafter “the Joint Meeting”), as prescribed in Article 5, paragraph 2 of the Rules on Selection of Head of National University Corporation Institute of Science Tokyo (Decision of Chairperson of the Joint Meeting on February 22, 2024), has selected the second-round candidates from the group of first-round candidates based on a screening of their statements of intent, etc. Accordingly, we hereby announce their names, affiliations, job titles, statements of intent, etc. as follows. Second ..read more

The recent discovery of Side-IV/Beat-IIb immunoglobulin proteins as the drivers of synaptic specificity and regulators of neuronal cell-surface recognition by researchers from Tokyo Tech provides a comprehensive view of the functioning of synapses. The intricate interplay between Side-IV/Beat-IIb complex, Side-IV's co-receptor, Kirre, and synaptic scaffold protein Dsyd-1 enables a preferential and bifurcated signaling mechanism among neuronal pairs. Neurons or nerve cells are the fundamental components of the central nervous system and are critically involved in signal transduction pathway ..read more