Iwasa Group

About us

Almost all devices realize their functionality in the interface. Semiconductor device is its striking example, and the present laboratory aims to achieve, by the interface and device, the physical properties and functions difficult or impossible, in the thin film single and single crystal.

In recent years, we proposed and developed the electric double layer transistor based on the fusion theories of semiconductor electronics and electrochemistry, and even condensed matter physics, and we have realized the physical properties and functions impossible to achieve in the solid conventional devices such as electronic phase control, including the electric-field-induced superconductivity. To develop more and more such research and create electronic function theory "Iontronics" by ion motion-array control is the purpose of this laboratory.

News & Topics

2023.4: B4 Oshigane and B4 Kimura has joined us as new members.
2022.12: Former international student Max's paper is published in "Nature Communications". [link]
Title「Vortex dynamics in the two-dimensional BCS-BEC crossover」
2022.11: D1 Dong's paper is published in "Nature Nanotechnology". [link][プレスリリース]
Title「Giant bulk piezophotovoltaic effect in 3R-MoS_{2_」}
2022.04: B4 Oguchi, B4 Kawamoto, & B4 Kolak joined us.
2022.4: Research associate Itahashi's paper is published in "Nature Communications". [リンク][プレスリリース]
Title「Giant second harmonic transport under time-reversal symmetry in a trigonal　superconductor」
2022.3: M2 Musashi received Best Poster Award in the Cryogenic Research Center 13th Annual Research Meeting.
2022.3: D3 Itahashi received The 61th Fullerenes, Nanotubes and Graphene symposium young researcher award & Nanoscale Horizons award.
2021.04: B4 Aoki, & B4 Endo joined us.
2021.4: Xiang Huang joined us!
2021.4: Research associate Ideue received award from Japanese Ministry of education.[リンク]
2021.4: Graduate Akamatsu and Research associate Ideue's paper is published in 「Science」 [リンク]
Title「A van der Waals interface that creates in-plane polarization and a spontaneous photovoltaic effect」
2021.3: Graduate　Matsuoka's paper is published in 「Nano Letters」[Link]
Title「Spin–Orbit-Induced Ising Ferromagnetism at a van der Waals Interface」
2021.3: Graduate Matsuoka and M2 Dong received The 60th Fullerenes, Nanotubes and Graphene symposium young researcher award. Matsuoka also received Nanoscale Horizons award, while Dong also received Journal of Materials Chemistry A award.
2021.3: Graduate　Nakagawa's paper is published in 「Science」[Link]
Title「Gate-controlled BCS-BEC crossover in a two-dimensional superconductor」
2021.3: Professor Iwasa and Research associate Ideue's paper is published in 「Annual Review of Condensed Matter Physics」[Link]
Title「Symmetry Breaking and Nonlinear Electric Transport in van der Waals Nanostructures」
2020.12: Research associate Ideue and Master Koshioka's paper is published in 「Physical Review Research」[Link]
Title「Giant nonreciprocal magnetotransport in bulk trigonal superconductor PbTaSe₂」
2020.11: staff Majima received The 59th Fullerenes, Nanotubes and Graphene symposium young researcher award & Nanoscale Horizons award.
2020.09: M1 Musashi's paper is published in "Physical Review Letters". [Link]
She contributed to this work when she was in Kawasaki lab.
Title「Superconductivity in Uniquely Strained RuO₂ Films」
2020.08: Prof. Iwasa and Research associate Ideue's article is published in "Nature". [Link]
2020.08: Prof. Iwasa's paper is published in "Physics Today". [Link]
Title「Nanotubes from layered transition metal dichalcogenides」
2020.07: Graduate Saito's paper is published in "Physical Review Materials". [Link]
Title「Dynamical vortex phase diagram of two-dimensional superconductivity in gated MoS₂」
2020.05: Graduate Onga's paper is published in 「Nano Letters」. [Link]
Title「Antiferromagnet–Semiconductor Van Der Waals Heterostructures: Interlayer Interplay of Exciton with Magnetic Ordering」
2020.05: D2 Itahashi's paper is published in 「Physical Review Research」. [Link]
Title「Quantum and classical ratchet motions of vortices in a two-dimensional trigonal superconductor」
2020.05: B4 Kajihara, B4 Nohara, & B4 Yamamoto joined us.
2020.03: D1 Itahashi's paper is published in 「Science Advances」. [Link]
Title「Nonreciprocal transport in gate-induced polar superconductor SrTiO₃」
2020.03: D2 Matsuoka's paper is published in 「Physical Review Research」. [Link]
Title「Angle dependence of H_c2 with a crossover between the orbital and paramagnetic limits」
2020.02: Max Heyl joined us. [Pictures]
2020.02: M2 Tanaka and D2 Matsuoka's paper is published in 「Nano Letters」. [Link]
Title「Superconducting 3R-Ta_1+xSe₂S with Giant In-Plane Upper Critical Fields」
2020.02: Prof. Iwasa's article was published in "RONZA" in The Asahi Shimbun. [Link]
2019.12: Research associate Ideue's paper is published in "PNAS". [Link]
Title「Pressure-induced topological phase transition in noncentrosymmetric elemental tellurium」
2019.12: Graduate Saito's paper is published in "npj Computational Materials". [Link]
Title「Deep-learning-based quality filtering of mechanically exfoliated 2D crystals」
2019.11: Prof. Iwasa was selected for "Highly Cited Researchers 2019". [Link]
[Web of Science Newsletter]
[Press release]
2019.11: Specially Appointed Associate Professor Nakano's paper is published in "Nano Letters". [Link]
Title「Intrinsic 2D Ferromagnetism in V₅Se₈ Epitaxial Thin Films」
2019.11: D2 Matsuoka received Young Scientist Presentation Award in the 47th JSAP Autumn Meeting 2019. [Link][Picture]
2019.11: Professor Iwasa received "The 2019 Nishina Memorial Prize" from the Nishina Memorial Foundation. [Link]
2019.10: D3 Nakagawa & D2 Matsuoka received "Student Presentation Award" at JPS 2019 Autumn Meeting. [Link]
2019.10: Research associate Ideue received "The 14th Young Scientist Award of the Physical Society of Japan". [Link]
2019.10: D2 Matsuoka received "RPGR Young Scientist Prize" at RPGR 2019. [Link]
2019.10: Yu Dong join us.
2019.06: D3 Nakagawa received "Young Researchers Award" at SNS 2019. [Link]
2019.06: Dr. Zhang's paper is published in "Nature". [Link]
Title「Enhanced intrinsic photovoltaic effect in tungsten disulfide nanotubes」
[Nature news & views]
[Highlighted in "Nature highlight"]
2019.06: Lab. trip[Pictures]
We went to Minami-Boso. Fortunately with great weather, we enjoyed the hiking at Nokogiri-yama and 'Kamogawa Seaworld'.
2019.04: D1 Itahashi received "Presentation Award for Students" from the Physical Society of Japan. [Link]
2019.04: Research associate Ideue received "The 18th Funai Encouragement Award of Research in 2018".[Link]
2019.04: B4 Goto & B4 Zaitsu joined us.
2019.03: M2 Kashiwabara's paper is published in 「Advanced Functional Materials」. [Link]
Title「Electrical Conduction at the Interface between Insulating van der Waals Materials」
2018.12: Prof. Iwasa was selected for "Highly Cited Researchers 2018". [Link]
2018.10: Graduate Saito received "Young Scientist Award of the Physical Society of Japan". [Link]
2018.10: D1 Matsuoka's paper is published in Physical Review B」. [Link]
Title「Signatures of charge-order correlations in transport properties of electron-doped cuprate superconductors」
2018.10: D3 Qin's paper is published in "Nano Letters". [Link]
Title「Diameter-dependent superconductivity in individual WS₂ nanotubes」
[Highlighted in "research highlights"]
2018.08: D2 Nakagawa's paper is published in "Physical Review B". [Link]
Title「Gate-controlled low carrier density superconductors: Toward the two-dimensional BCS-BEC crossover」
2018.08: D1 Wang's paper is published in "Applied Physics Letters". [Link]
Title「Transport properties of a few nanometer-thick TiSe₂ films grown by molecular-beam epitaxy」
2018.04: D2 Qin's paper is published in "JoVE". [Link]
Title「Electric-field Control of Electronic States in WS₂ Nanodevices by Electrolyte Gating」
2018.04: B4 Kubota & B4 Watanabe joined us.
2018.04: Dr. Zhang's paper is published in "2D Materials". [Link]
Title「Optoelectronic response of a WS₂ tubular p-n junction」
2018.04: Graduate Yoshida's paper is published in "Nano Letters". [Link]
Title「Metastable Superconductivity in Two-Dimensional IrTe₂ Crystals」
2018.04: M1 Tanaka joined us.
2018.03: D3 Saito received Dean's Award.
The title of his awarded thesis is "Study on Electric-Field-Induced 2D Superconductivity"
2018.02: D3 Saito's paper is published in "Nature Communications". [Link]
Title「Quantum phase transitions in highly crystalline two-dimensional superconductors」
Chosen as Editors' Highlights in Nature Communications Condensed Matter Physics[Link]
2018.02: M2 Koshikawa received Distinguished Master Thesis Award.
The title of his awarded thesis is "Nonreciprocal charge transport in noncentrosymmetric crystals"
2018.01: D3 Saito received JSPS Ikushi Prize.[Link][Pictures]
2017.12: Graduate Zhang and Yoshida received Inoue Research Award for Young Scientists.[Link][photos]
2017.11: Graduate Zhang and Suzuki's paper is published in "ACS NANO". [Link]
Title「Potential Profile of Stabilized Field-Induced Lateral p–n Junction in Transition-Metal Dichalcogenides」
2017.11: D1 Onga received Young Scientist Presentation Award in the 78th JSAP Autumn Meeting 2017.[Link]
2017.10: D1 Onga's paper is published in "Nature Materials". [Link]
Title「Exciton Hall effect in monolayer MoS₂」
[Highlighted in "News and Views"]
2017.09: Frans joined us as an special auditor.[Pictures]
2017.08: Specially-appointed lecturer Nakano and M2 Wang's paper is published in "Nano Letters". [Link]
Title「Layer-by-layer epitaxial growth of scalable WSe₂ on sapphire by molecular beam epitaxy」
2017.08: Graduate Yoshida's paper is published in "Nano Letters". [Link]
Title「Extended polymorphism of two-dimensional material」
2017.08: Joshua (inter-ship student) received UNDERGRADUATE POSTER SESSION AWARDS in the 2017 SCI Summer Research Colloquium.[Link]
2017.07: Farewell Party for Joshua at Takadanobaba.[Pictures]
2017.06: Joshua joined us as an intern-ship student.[Pictures]
2017.05: Lab. trip[Pictures]
We went to Mashiko, Tochigi and Tsukuba, Ibabaraki. Unfortunately it was rainy, but we enjoyed the experience making pottery and a tour at JAXA.
2017.05: Research associate Ideue's paper in his doctor course at Tokura lab. is published in "Nature Materials". [Link]
Title「Giant thermal Hall effect in multiferroics」
2017.05: Graduate Zhang's paper is published in "Physical Review B". [Link]
Title「Robustly protected carrier spin relaxation in electrostatically doped transition-metal dichalcogenides」
2017.04: D3 Saito's paper is published in "Science Advances". [Link]
Title「Nonreciprocal charge transport in noncentrosymmetric superconductors」
2017.04: B4 Akamatsu & B4 Majima joined us.[Pictures]
2017.03: D3 Yoshida's paper is published in "Physical Review B". [Link]
Title「Current switching of electronic structures in two-dimensional 1T-TaS₂ crystals」
2017.03: Research associate Ideue's paper is published in "Nature Physics". [Link]
Title「Bulk rectification effect in a polar semiconductor」
2017.02: M2 Onga received the Best Poster Award in the 8th Cryogenic Research Center Conference.
2017.02: D1 Qin's paper is published in "Nature Communications". [Link]
Title「Superconductivity in a chiral nanotube」
[Article in Academist Journal]
[Article in PHYS ORG]
[Article in AZONANO]
[Article in Science alert]
[Article in Nature Communications]
2017.02: Former Research associate Kasahara and Professor Iwasa's paper is published in "Nature Communications". [Link]
Title「Upper critical field reaches 90 tesla near the Mott transition in fulleride superconductors」
2017.02: M2 Onga received Distinguished Master Thesis Award.
The title of his awarded thesis is "Excitonic Hall effect in two-dimentional materials"
2016.12: D2 Saito's paper is published in "Nature Reviews Materials". [Link] [View Only]
Title「Highly crystalline 2D superconductors」
2016.09: D2 Saito & Mr. Iizuka's paper is published in "Nano Letters". [Link]
Title「Gate-tuned thermoelectric power in black phosphorus」
2016.09: Shioya-san, Nakano-san & Iwasa-sensei received the Award "応用物理学会優秀論文賞", Iwasa-sensei received the Award "応用物理学会解説論文賞" from JSAP
2016.09: Yoshida-san received the Poster Award at the IMPACT 2016.
2016.08: Farewell Party for Sasha-san.
2016.09: D2 Saito's paper is published in "Superconductor Science and Technology". [Link]
Title「Gate-induced superconductivity in two-dimensional atomic crystals」
2016.07: Farewell Party for Zhang-san.
2016.06: Sasha Yamada joined us as an intern-ship student.
2016.05: D3 Yoshida's paper is published in "Applied Physics Letters". [Link]
2016.04: B4 Itahashi, B4 Kashiwabara, B4 shin & B4 Taikou joined us.
2016.02: M1 Onga's paper is published in "Applied Physics Letters". [Link]
2016.02: B4 Koshikawa received Distinguished Bachelor Thesis Award.
The title of his awarded thesis is "Charge-Spin Transport in Layered Polar Semiconductors"
2016.02: D2 Yoshida & Mr. Iizuka's paper is published in "Nano Letters". [Link]
2016.02: Dr. Ideue received Inoue Research Award for Young Scientists.
2015.12: D1 Saito’s paper is published in “Nature Physics”. [Link][Press release]
2015.10: Imoni party was held (with Prof. Vitaly Podzorov).[Pictures]
2015.10: D2 Yoshida’s paper is published in “Science Advances”. [Link][Press release]
2015.10: D1 Saito’s paper is published in “Science”. [Link][Press release]
2015.08: Dr. Shi’s paper is published in “Scientific Reports”. [Link]
2015.08: Farewell Party for Researcher Shi.
2015.07: Lecturer Nakano’s paper is published in “Advanced Electronic Materials”. [Link]
2015.05: Lab. trip
We visited Komagane Highlands in Nagano, Shosenkyo, Katsunuma in Yamanashi and so on.
2015.04: Professor Iwasa received The 12th Honda Frontier Award from the Honda Memorial Foundation.
2015.04: B4 Koshikawa & B4 Matsuoka join us.
2015.04: Dr. Ideue joins us.
2015.03: D1 Yoshida received The 48th Fullerenes, Nanotubes and Graphene symposium young researcher award & Journal of Materials Chemistry A award.[Pictures]
2015.03: B4 Nakagawa received Dean's Award.
2015.03: D2 Zhang received Best Poster Award in 1st International Workshop on topoligical Electronics.[Pictures]
2015.03: M2 Saito’s paper is published in “ACS Nano”. [Link]
2015.02: B4 Nakagawa received Distinguished Bachelor Thesis Award.
The title of his awarded thesis is "In-situ Measurement of Intercalation and Superconductivity in ZrNCl Single Crystal"
2015.02: M2 Saito received Distinguished Master Thesis Award.
The title of his awarded thesis is "Superconductivity in Ion-gated Two-dimensional Materials"
2014.12: D1 Yoshida’s paper is published in “Scientific Reports”. [Link]
2014.11: Dr. Shi received Best Poster Silver Medal in "Ushimado International Workshop on Physics and Chemistry of Novel Superconducotrs and Related Materials".[pictures]
2014.10: Imoni pary & Welcome party for Qin and Wang
2014.10: Feng Qin and Yue Wang join us.
2014.10: B4Nakagawa（Imada lab.）とMiyazaki（Motome lab.）received Poster Award 2014[poster]
2014.10: D1 Suzuki received The 47th Fullerenes, Nanotubes and Graphene symposium young researcher award & Journal of Materials Chemistry A award.[Pictures]
2014.08: Farewell Party for Naoki Shiba.
2014.07: D1 Suzuki’s paper is published in “Nature Nanotechnology”. [Link][press release]
2014.07: Farewell Party for Assistant Professor Kasahara.
2014.06: Naoki Shiba joins us.
2014.06: Lab trip
We visited Izu in Shizuoka.
2014.06: Lecturer Nakano joins us.
2014.04: D2 Zhang’s paper is published in “Science”. [Link][press release]
2014.04: Professor Iwasa received the award in scientific and research disciplinecommended by Minister of Science and Technology.
2014.04: Hanami party was held
2014.02: M2 Suzuki received the Best Poster Award in the 5th Cryogenic Research Center Conference.
2014.02: Farewell Party for Students
Bachelor course student Inoue and Hamamoto graduated and join Machida lab. and Nagaosa lab., respectively.
2013.10: Farewell Party for Lecturer Ye.
2013.09: Dr.Shioya joins us.
2013.07: Former assistant professor Yuan’s paper is published in “Nature Physics”. [Link][press release]
2013.06: D1 Zhang’s paper is published in “Nano Letters”. [Link]
2013.06: Lab trip
We visited Sai-lake in Yamanashi. We enjoyed sports, hot spring, BBQ, and fireworks. We also enjoyed paddling a canoe.
2013.04: B4 students join us.
Two students join us for their batchelur corce thesis.
You can check members here.
2013.04: Dr. Ross Colman visit
Dr. Ross Colman (Department Chemistry Durham University) was invited for QPEC-MERIT seminar as speaker and visited our lab.
2013.02: B4 Saito received Distinguished Bachelor Thesis Award.
The title of his awarded thesis is "Nano Interface Phase Transition Device with Layered Thin Films"
2012.12: Assistant professor Kasahara’s paper is published in “Physical Review Letters”. [Link]
2012.11: Lecturer Ye’s paper is published in “Science”. [Link][press release]
2012.10: Imoni Party was held.
2012.09: EDLT TOKYO
EDLT TOKYO -an International Workshop on Electric Double Layer Transistor- was held.
You can see details here .
2012.06: Lab. trip!
We visited Kawaguchiko-lake. We enjoyed sports, hot spring, BBQ, and fireworks☆We also visited Mt. Fuji up to go-goume (五合目)!
You can see pictures here.
2012.04: B4 students join us.
Three students join us for their batchelur corce thesis.
You can check members here.
2012.02: M1 Zhang’s paper is published in “Nano Letters”. [Link]
2011.09: Dr. Shi joins us.
2011.04: B4 students join us.
Three students join us for their batchelur corce thesis.
2011.04: Mr. Chen joins us.
We welcome a new student from China.
2011.04: Farewell Party
Lecturer Shimotani is promoted to a Associate Professor at Tohoku University.
2011.02: Farewell Party for Students
Master course students Tsuda, Nishijima, and Yoon completed their course and start to work.
Bachelor course student Matsuhashi and Morimoto graduated and join Shimura lab. and Tarucha lab., respectively.
2011.02: B4 Morimoto received Distinguished Bachelor Thesis Award.
The title of his awarded thesis is "Electric Field Modulated Rashba Effect in Liquid Gated Transistors"
2011.01: A paper of Assistant Prof. Kasahara was selected for the Papers of Editors' Choice.
The title is "Electric-Field-Induced Superconductivity Detected by Magnetization Measurements of an Electric-Double-Layer Capacitor" on the JPSJ magazine.
2011.01: Introduction of the He3-system for PPMS
We can sweep the temperature down to 0.35K with this system.
2010.12: Year-end Trip / Party
Thank you very much for this year. and a HAPPY NEW YEAR!