{"title":"My Research Life in NIMS","authors":"Kenta YOKOTA","doi":"10.1380/vss.66.558","DOIUrl":"https://doi.org/10.1380/vss.66.558","url":null,"abstract":"","PeriodicalId":470115,"journal":{"name":"Hyomen to shinku","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Rehearsal for the Internationalization of JVSS Annual Meeting","authors":"Naruo SASAKI","doi":"10.1380/vss.66.513","DOIUrl":"https://doi.org/10.1380/vss.66.513","url":null,"abstract":"","PeriodicalId":470115,"journal":{"name":"Hyomen to shinku","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"角度分解光電子分光によるBi(111)上Sb超薄膜の電子状態","authors":"H. ABE, M. IMAMURA, K. TAKAHASHI, A. TAKAYAMA","doi":"10.1380/vss.66.548","DOIUrl":"https://doi.org/10.1380/vss.66.548","url":null,"abstract":"To investigate electronic states at the interface between surfaces that exhibit unique spin-split band dispersions is an important step in the development of a new materials that can be used to spintronics device. Antimony (Sb) and bismuth (Bi) are interesting targets for studying the nature of peculiar spin properties due to spin-orbit interactions. In this study, we fabricated the Sb ultrathin films on Bi substrate. The surface structure and electronic states of Sb/Bi heterostructure was confirmed by the low-energy electron diffraction measurement and angle-resolved photoemission spectroscopy, respectively. For 2 and 3 BL Sb film on Bi substrate, we observed a “V”-shaped electronic band, which is significantly different from the electronic state of Bi thin film and freestanding Sb ultrathin film. We conclude that this band dispersion is caused by the tensile lattice strain of Sb ultrathin film and the hybridization effect of the wavefunction with the Bi substrate.","PeriodicalId":470115,"journal":{"name":"Hyomen to shinku","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of Covalent Organic Framework (COF) Films Using Vapor Deposition Polymerization","authors":"Masaki KATO","doi":"10.1380/vss.66.560","DOIUrl":"https://doi.org/10.1380/vss.66.560","url":null,"abstract":"","PeriodicalId":470115,"journal":{"name":"Hyomen to shinku","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interface Characterization on All-Solid State Batteries by Multi-technique XPS","authors":"Masahiro TERASHIMA, Kazutoshi MAMIYA, Atsuo ONO, Takahito KIMOTO, Shunsuke SASAKI, Shin-ichi IIDA","doi":"10.1380/vss.66.543","DOIUrl":"https://doi.org/10.1380/vss.66.543","url":null,"abstract":"All-solid-state batteries (ASSBs) have been attracting attention as the next generation batteries, but they face challenges, including internal resistance at the solid electrolyte/electrode interface. This study examines a LiPON/LiCoO2 interface using multi-technique X-ray photoelectron spectroscopy (XPS) to analyze chemical states and energy band diagrams. Results show that interlayer formation and structural changes during manufacturing stimulate Co reduction in the LiCoO2 layer near the interface, leading to an increase in interfacial impedance. To minimize internal resistance, preventing Co reduction is necessary. The study offers insights into the chemical interactions between LiPON and LiCoO2 layers, which may help address challenges in ASSBs commercialization.","PeriodicalId":470115,"journal":{"name":"Hyomen to shinku","volume":"366 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kenichi KAWAGUCHI, Manabu OHTOMO, Mari OHFUCHI, Russell S. DEACON, Masayuki HOSODA, Akihiko SEKINE, Naoki FUSHIMI, Hirokazu HOSOI, Michael D. RANDLE, Koji ISHIBASHI, Shintaro SATO
{"title":"Research and Development of WTe<sub>2</sub> Platform for Generation of Majorana Particles","authors":"Kenichi KAWAGUCHI, Manabu OHTOMO, Mari OHFUCHI, Russell S. DEACON, Masayuki HOSODA, Akihiko SEKINE, Naoki FUSHIMI, Hirokazu HOSOI, Michael D. RANDLE, Koji ISHIBASHI, Shintaro SATO","doi":"10.1380/vss.66.537","DOIUrl":"https://doi.org/10.1380/vss.66.537","url":null,"abstract":"The gapless electronic states in the topological insulators (TI) with symmetry protection are the viable platform for Majorana qubits in future fault-tolerant topological quantum computation. Among transition metal dichalcogenides, tungsten ditelluride (WTe2), which has a large spin-orbit coupling, is considered as a promising material for such TI. In this report, we introduce our recent research on WTe2 platform. We report on a heterostructure of WTe2 and superconducting material with high quality, using spontaneous formation of superconducting PdTe. We demonstrate Josephson junction devices with weak links for multi-layer WTe2. We show the electronic states of monolayer and bilayer Td-WTe2 using density functional theory. These Td-WTe2 layers can exhibit quantum spin Hall states depending on the directions of stripes and step edges, which expands the availability of WTe2. These studies deepen the process technology and material science of WTe2, which will pave the way for realizing a platform for Majorana particles.","PeriodicalId":470115,"journal":{"name":"Hyomen to shinku","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"グラフェンとHex-Au(001)再構成表面の軌道混成によるバンドギャップの形成","authors":"Tomo-o TERASAWA, Kazuya MATSUNAGA, Naoki HAYASHI, Takahiro ITO, Shin-ichiro TANAKA, Satoshi YASUDA, Hidehito ASAOKA","doi":"10.1380/vss.66.525","DOIUrl":"https://doi.org/10.1380/vss.66.525","url":null,"abstract":"As Au(001) surfaces exhibit a quasi-one-dimensional corrugated structure, Hex-Au(001), its periodicity was predicted to change the electronic structure of graphene when graphene was grown on this surface. Furthermore, the hybridization between graphene and Au is known to introduce bandgap and spin polarization into graphene. Here, we report angle-resolved photoemission spectroscopy and density functional theory calculation of graphene on a Hex-Au(001) surface. A bandgap of 0.2 eV in the graphene Dirac cone was observed at the crossing point of the graphene Dirac cone and Au 6sp bands, indicating that the origin of the bandgap formation was the hybridization between the graphene Dirac cone and Au 6sp band. We discussed the hybridization mechanism and anticipated spin injection into the graphene Dirac cone.","PeriodicalId":470115,"journal":{"name":"Hyomen to shinku","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Satoshi YASUDA, Wilson Agerico DIÑO, Katsuyuki FUKUTANI
{"title":"グラフェンを介したヒドロンの量子トンネリングによる水素同位体分離","authors":"Satoshi YASUDA, Wilson Agerico DIÑO, Katsuyuki FUKUTANI","doi":"10.1380/vss.66.514","DOIUrl":"https://doi.org/10.1380/vss.66.514","url":null,"abstract":"Monolayer graphene, representative of atomically thin crystals, has recently shown unexpectedly high proton and deuteron permeability under ambient conditions. It also permeates (filters) hydrogen (deuterium) isotope ion with high selectivity (~10 at room temperature). These results suggest possible ways of developing novel and efficient hydrogen isotope gas enrichment techniques for manufacturing silicon semiconductors, optical fibers, drug development, nuclear fusion, and other related applications. And yet, despite its importance, experimental studies remain scarce and the separation mechanism contentious. Here, we introduce our recent findings on how quantum tunneling of hydrons through graphene could account for the high hydron selectivity of graphene.","PeriodicalId":470115,"journal":{"name":"Hyomen to shinku","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136071749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}