Nature Search

Giant thermoelectric power factor in ultrathin FeSe superconductor

In an effort to optimize the performance of two-dimensional materials for thermoelectric generation, compounds with advantageous intrinsic properties must be identified. Here, the authors report large thermoelectric effect in ultrathin FeSe thin films with high T_c superconductivity.

Sunao Shimizu
Junichi Shiogai
Yoshihiro Iwasa
ResearchOpen Access18 Feb 2019
Nature Communications

Volume: 10, P: 1-7
Quantum phase transitions in highly crystalline two-dimensional superconductors

Superconductor-insulator transitions predominantly occur in highly disordered thin films. Here, Saito et al. report that a quantum metallic state transforms via the quantum Griffiths state to a weakly localized metal at high magnetic fields in a crystalline two-dimensional superconductor.

Yu Saito
Tsutomu Nojima
Yoshihiro Iwasa
ResearchOpen Access22 Feb 2018
Nature Communications

Volume: 9, P: 1-7
Novel Poly(urethane-amide)s from Polyurethane Prepolymer and Reactive Polyamide. Preparation and Properties

Tsutomu Takeichi
Kyoko Suefuji
Kazuto Inoue
Research01 Jun 2002
Polymer Journal

Volume: 34, P: 455-460
Superconductivity protected by spin–valley locking in ion-gated MoS₂

The electric-field-induced superconducting properties of MoS₂ are investigated by means of magneto-transport measurements, uncovering evidence of spin–momentum locking.

Yu Saito
Yasuharu Nakamura
Yoshihiro Iwasa
Research07 Dec 2015
Nature Physics

Volume: 12, P: 144-149
Three-dimensional sensing of the magnetic-field vector by a compact planar-type Hall device

Three-dimensional magnetometers are key for detecting the motion of objects in automated electronics, but typically require multiple sensors on orthogonal planes. Here, a compact planar-type 3D magnetometer with low power consumption is realized using a topological ferromagnetic Fe-Sn heterostructure.

Junichi Shiogai
Kohei Fujiwara
Atsushi Tsukazaki
ResearchOpen Access04 Oct 2021
Communications Materials

Volume: 2, P: 1-6
A scaling relation of vortex-induced rectification effects in a superconducting thin-film heterostructure

An iron-based superconductor Fe(Se,Te) is a candidate material for exploring nonreciprocal superconducting transport owing to its large critical parameters and spin-orbit interaction. Here, the authors find a scaling relation of the superconducting diode efficiency in Fe(Se,Te)/FeTe heterostructure, revealing the role of asymmetric vortex pinning effect coupled to the spin-orbit interaction.

Yusuke Kobayashi
Junichi Shiogai
Jobu Matsuno
ResearchOpen Access12 May 2025
Communications Physics

Volume: 8, P: 1-6
Highly crystalline 2D superconductors

Highly crystalline 2D superconductors can exhibit very low sheet resistances and unusual physical properties, such as a quantum metallic state, a quantum Griffiths phase and superconductivity robust against in-plane magnetic fields. The origins of these phenomena and the materials in which they are observed are reviewed.

Yu Saito
Tsutomu Nojima
Yoshihiro Iwasa
Reviews20 Dec 2016
Nature Reviews Materials

Volume: 2, P: 1-18
FCN1 (M-ficolin), which directly associates with immunoglobulin G1, is a molecular target of intravenous immunoglobulin therapy for Kawasaki disease

Daisuke Okuzaki
Kaori Ota
Hiroshi Nojima
ResearchOpen Access12 Sept 2017
Scientific Reports

Volume: 7, P: 1-12

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