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Advanced Materials Science

Title
Date
Intrinsic Reconstruction of Ice-I Surfaces 2020:09:12:15:44:44
AbstractUnderstanding the precise atomic structure of ice surfaces is critical for revealing the mechanisms of physical and chemical phenomena at the surfaces, such as ice growth, melting, and chemical reactions. Nevertheless, no conclusive structure has been established. In this...
 
September 12, 2020
Visualization of ferroaxial domains in an order-disorder type ferroaxial crystal 2020:09:11:18:00:02
AbstractFerroaxial materials that exhibit spontaneous ordering of a rotational structural distortion with an axial vector symmetry have gained growing interest, motivated by recent extensive studies on ferroic materials. As in conventional ferroics (e.g., ferroelectrics and ferro...
 
September 11, 2020
Selenium-Bridged V-Shaped OSCs Exhibiting High Mobility and Unusual Aggregation Behavior 2020:08:20:17:24:15
AbstractToward the development of high-performance organic semiconductors (OSCs), carrier mobility is the most important requirement for next-generation OSC-based electronics. The strategy is that OSCs consisting of a highly extended π-electron core exhibit two-dimensional (2D) a...
 
August 20, 2020
Electroless-plated Gold for High-performance Organic Thin Film Transistors 2020:08:10:9:01:39
AbstractDeposition of metallic electrodes on a semiconductor medium is an indispensable factor in governing carrier injection, and a metal/semiconductor contact that can be formed via solution process is highly desired in printed electronics. However, fine‐patterning the solution...
 
August 10, 2020
Low-voltage and high-mobility organic single-crystal transistors made by polymer-blend printing 2020:08:05:15:33:23
AbstructOrganic field-effect transistors (OFETs) have attracted great attention as key elements in Internet-of-Thing (IoT) devices due to their advantages of low cost and mass producibility made possible by printing technology. Such devices require organic semiconductors (OSCs) t...
 
August 5, 2020
Unimolecularly thick monosheets of vinyl polymers fabricated in metal–organic frameworks 2020:07:17:18:00:56
AbstractPolymers with two-dimensional (2D) network topologies are currently gaining significant attention due to their unique properties that originate from their regulated conformations. However, in contrast to conventional 1D- and 3D-networked macromolecules, the synthesis of s...
 
July 17, 2020
Imaging switchable magnetoelectric quadrupole domains via nonreciprocal linear dichroism 2020:07:09:18:00:45
AbstractParity-odd magnetoelectric multipoles such as magnetic quadrupoles and toroidal dipoles contribute to various symmetry-dependent magnetic phenomena and formation of exotic ordered phases. However, the observation of domain structures emerging due to symmetry breaking caus...
 
July 9, 2020
Motion tracking of 80-nm-size skyrmions upon directional current injections 2020:06:18:16:38:19
AbstractNanometer-scale skyrmions are prospective candidates for information bits in low–power consumption devices owing to their topological nature and controllability with low current density. Studies on skyrmion dynamics in different classes of materials have exploited the top...
 
June 18, 2020
Magnetochiral Dichroism in a Collinear Antiferromagnet with No Magnetization 2020:05:28:13:23:29
AbstractWe show the directional dichroism in a collinear antiferromagnet MnTiO3. The dichroism between two distinctive antiferromagnetic states with opposite signs of staggered magnetic moments can be regarded as magnetochiral dichroism in the absence of external fields. Electric...
 
May 28, 2020
Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet 2020:05:19:13:55:37
AbstractMagnetic skyrmions are topologically stable spin swirls with a particle-like character and are potentially suitable for the design of high-density information bits. Although most known skyrmion systems arise in non-centrosymmetric systems with a Dzyaloshinskii–Moriya inte...
 
May 19, 2020
Robust, High-Performance n-Type Organic Semiconductors 2020:05:02:9:00:30
AbstractOrganic semiconductors (OSCs) are important active materials for the fabrication of next-generation organic-based electronics. However, the development of n-type OSCs lags behind that of p-type OSCs in terms of charge-carrier mobility and environmental stability. This is ...
 
May 2, 2020
Cryogenic-specific reddish coloration could explain color diversity of outer solar system objects 2020:03:17:9:00:03
AbstructReddish coloration and color diversity among icy bodies in the outer solar system are significant clues for understanding the status and history of the solar system. However, the origin of color distribution remains debatable. Here, we demonstrate reddish coloration that ...
 
March 17, 2020
Damage-free Metal Electrode Transfer to Monolayer Organic Single Crystalline Thin Films 2020:03:16:9:00:26
AbstructSolution-processed organic thin film transistors (OTFTs) are an essential building block for next-generation printed electronic devices. Organic semiconductors (OSCs) that can spontaneously form a molecular assembly play a vital role in the fabrication of OTFTs. OTFT fabr...
 
March 16, 2020
Chemical identification of the foremost tip atom in atomic force microscopy 2020:03:13:9:00:35
AbstructChemical identification of individual surface atoms has been achieved by measuring the chemical bonds between tip and surface atoms using atomic force microscopy. On the other hand, the discrimination of chemical species at the tip apex is still a challenging task, even t...
 
March 13, 2020
Novel electronic nematicity in heavily hole-doped iron pnictides superconductors 2020:03:10:9:00:14
AbstructElectronic nematicity, a correlated state that spontaneously breaks rotational symmetry, is observed in several layered quantum materials. In contrast to their liquid-crystal counterparts, the nematic director cannot usually point in an arbitrary direction (XY nematics), ...
 
March 10, 2020
February 27, 2020
Charge mobility calculation of organic semiconductors without use of experimental singlecrystal data 2020:02:18:9:28:09
AbstractPrediction of material properties of newly designed molecules is a long-term goal in organic electronics. In general, it is a difficult problem, because the material properties are dominated by the unknown packing structure. We present a practical method to obtain charge ...
 
February 18, 2020
High‐Speed Organic Single‐Crystal Transistor Responding to Very High Frequency Band 2020:02:06:9:36:26
AbstractAlthough high carrier mobility organic field‐effect transistors (OFETs) are required for high‐speed device applications, improving the carrier mobility alone does not lead to high‐speed operation. Because the cut‐off frequency is determined predominantly by the total resi...
 
February 6, 2020
Sub-molecular structural relaxation at a physisorbed interface with monolayer organic semiconductors 2020:01:24:8:58:48
AbstractArranging molecules into highly symmetric, topological crystal structures has been recognized as the best approach to functionalize electronic properties in molecular crystals, where the constituent molecules have been assumed to be rigid in shape. Here, in striking contr...
 
January 24, 2020
Controlled transformation of skyrmions and antiskyrmions in a non-centrosymmetric magnet 2020:01:21:15:16:08
AbstractControl of topological spin textures in magnetic systems may enable future spintronic applications. Magnetic field pulses can switch the vortex polarity or the winding number of magnetic bubbles. Thermal energy can reverse the helicity of skyrmions and induce the transfor...
 
January 21, 2020
High performance, semiconducting membrane composed of ultrathin, single-crystal organic semiconducto 2019:12:17:15:44:52
AbstractThin film transistors (TFTs) are indispensable building blocks in any electronic device and play vital roles in switching, processing, and transmitting electronic information. TFT fabrication processes inherently require the sequential deposition of metal, semiconductor, ...
 
December 17, 2019
Topological charge transport by mobile dielectric-ferroelectric domain walls 2019:11:18:9:30:11
AbstractThe concept of topology has been widely applied in condensed matter physics, leading to the identification of peculiar electronic states on three-dimensional (3D) surfaces or 2D lines separating topologically distinctive regions. In the systems explored so far, the topolo...
 
November 18, 2019
Scalable Fabrication of Organic Single-Crystalline Wafers for Reproducible TFT Arrays 2019:11:05:9:00:39
AbstractBuilding on significant developments in materials science and printing technologies, organic semiconductors (OSCs) promise an ideal platform for the production of printed electronic circuits. However, whether their unique solution-processing capability can facilitate the ...
 
November 5, 2019
Biexciton in one-dimensional Mott insulators 2019:11:01:9:00:42
AbstractMott insulators sometimes show dramatic changes in their electronic states after photoirradiation, as indicated by photoinduced Mott-insulator-to-metal transition. In the photoexcited states of Mott insulators, electron wave functions are more delocalized than in the grou...
 
November 1, 2019
September 30, 2019
Room-Temperature Low-Field Colossal Magnetoresistance in Double-Perovskite Manganite 2019:09:18:16:40:43
S. Yamada, N. Abe, H. Sagayama, K. Ogawa, T. Yamagami, and T. ArimaWe have discovered room-temperature low-field colossal magnetoresistance (CMR) in an A-site ordered NdBaMn2O6 crystal. The resistance changes more than 2 orders of magnitude at a magnetic field lower than 2 T near...
 
September 18, 2019
September 13, 2019
Ion exchange discovered in solid-state semiconducting polymers 2019:08:29:10:00:55
Ion exchange discovered in solid-state semiconducting polymers: Dr. Yu Yamashita, Prof. Jun Takeya, Project Associate Professor Shun Watanabe, and other researchers -Department of Advanced Materials Science The research team demonstrated a new strategy for chemical doping of poly...
 
August 29, 2019
August 9, 2019
Discovery of New Refractive Phenomena of Light: Difference between Back and Forth 2019:08:02:15:08:10
光の屈折の新現象を発見~往路と帰路で光の経路にずれ~発表者有馬 孝尚(東京大学大学院新領域創成科学研究科物質系専攻 教授)豊田 新悟(研究当時:東京大学大学院新領域創成科学研究科物質系専攻 大学院生現:理化学研究所創発物性科学研究センター 基礎科学特別研究員) 発表のポイント◆メタホウ酸銅(注1)という物質において光の屈折を調べた結果、ある方向から光を入射した場合と逆方向から光を入射した場合で、屈折方向に差が生じることが分かった。◆この光の通る経路が行きと帰りで変化する現象は、今回初めて実験で観測された。◆今回発見された非対称な屈折現象は非常に小さな...
 
August 2, 2019
Detecting novel mobile particles with neutral charge in an insulator 2019:07:02:10:00:02
絶縁体中を動き回る謎の中性粒子を検出―「絶縁体」における「金属」的な熱の伝搬―概要 京都大学大学院理学研究科の佐藤雄貴 博士課程学生、笠原成 同助教、笠原裕一 同准教授、松田祐司 同教授、東京大学大学院新領域創成科学研究科の芝内孝禎 教授、茨城大学理学部の伊賀文俊 教授の研究グループは、米国ミシガン大学、米国ロスアラモス国立研究所と共同で、ある種の絶縁体の内部を動き回る未知の中性粒子を発見しました。物質は電気が流れるか流れないかで金属と絶縁体の二種類に分類され、金属は熱を伝えやすく絶縁体は熱を伝えにくいという性質をもちます。これは金属中で電気...
 
July 2, 2019
C.elegans was alive even below freezing -New low temperature storage- 2019:05:16:9:46:28
C. elegans was alive even below freezing !!-New low temperature storage and expectation for normal temperature storage- publisher:Nature ”Scientific Reports” DOI: 10.1038/s41598-019-42650-8author:Masahiro Kuramochi1,2, Sakae Tsuda2, and Yuji C. Sasaki1,2(Corresponding author: M. ...
 
May 16, 2019
March 18, 2019
March 18, 2019
Emeritus Prof. Maki Kawai receives the L’Oréal-UNESCO international award for women in science. 2019:03:08:10:10:20
Professor Emerita Maki Kawai receives the 21st edition of the L'Oréal-UNESCO international award for women in science, in recognition of her exceptional scientific achievements.
 
March 8, 2019
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December 5, 2018
Successful Observations of the Dynamic of Single Molecules with Amazing Low X-ray Doses 2018:11:30:19:00:35
-Acceleration and use expansion of super-high precision single molecule motion measurements -
 
November 30, 2018
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August 2, 2018
Dean’s Award for Outstanding Achievement, Graduate School of Frontier Sciences 2018 2018:04:13:10:59:02
The recipients of the Dean's Award for Outstanding Achievement (Master course 12 students, Doctoral course 11 students) GSFS 2018 were announced. The awards were initiated in 2006 for the purpose of recognizing students and groups for outstanding achievement in academic learning, international exchange, and regional contribution. A ceremony was held on Wednesday March 14, and Dean Hiroshi Mitani awarded plaques to the recipients.
 
April 13, 2018

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