
Principal Investigator
Aichi Yamashita
Senior Researcher
Spin Caloritronics Group, National Institute for Materials Science (NIMS) / Superconducting Materials Laboratory, Department of Physics, Tokyo Metropolitan University (Visiting Associate Professor)
Education & Career
2007 – 2010
Shimizu High School (Kochi)
2010 – 2014
School of Environmental Science and Engineering (BC), Kochi University of Technology
2014 – 2016
National Institute for Materials Science / University of Tsukuba (MC)
NIMSジュニア研究員2016 – 2019
National Institute for Materials Science / University of Tsukuba (DC)
学振特別研究員 DC12019 – 2022
Department of Physics, Tokyo Metropolitan University — Project Assistant Professor
2022
Department of Physics, Tokyo Metropolitan University — Part-time Lecturer
2022 – present
Kochi University of Technology — Visiting Researcher
2022 – 2026
Department of Physics, Tokyo Metropolitan University — Assistant Professor
2026 – present
Department of Physics, Tokyo Metropolitan University — Visiting Associate Professor
2026 – present
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS) — Senior Researcher
Academic Societies
- 2025 –Magnetics Society of Japan
- 2024 –Cryogenics and Superconductivity Society of Japan
- 2024 –The Ceramic Society of Japan
- 2023 –Thermoelectrics Society of Japan
- 2022 –Materials Science Society of Japan
- 2014 –The Japan Society of Applied Physics
- 2014 –The Physical Society of Japan
Selected Publications
- 18.
A. Seshita, A. Yamashita* (Corresponding), T. Katase, Y. Mizuguchi, "Point defect scattering engineering for effective lattice thermal conductivity reduction in high-entropy-type thermoelectric material with rock salt structure", Jpn. J. Appl. Phys. Accepted (2025).
- 17.
A. Seshita, A. Yamashita* (Corresponding), T. Katase, Y. Mizuguchi, "High entropy effect on thermoelectric properties of nonequilibrium cubic phase of AgBiSe2-2xSxTex with x = 0-0.6", Dalton Trans. 53, 14830-14838 (2024).
- 16.
A. Seshita, A. Yamashita☨* (Co-first & Corresponding), T. Fujita, T. Katase, A. Miura, Y. Nakahira, C. Moriyoshi, Y. Kuroiwa, Y. Mizuguchi, "Stabilization and high thermoelectric performance of high-entropy-type cubic AgBi(S, Se, Te)2", J. Alloys Compd. 1004, 175679 (2024).
- 15.
T. Nakano, T. Maeda, T. Fujita, A. Yamashita* (Corresponding), "Synthesis and physical properties of (Pb0.5M0.5)(Sr,La)2CuOz (M = Fe, Co, Cu, Zn)", J. Alloys Compd. 958, 170298 (2023).
- 14.
A. Yamashita, K. Hashimoto, S. Suzuki, Y. Nakanishi, Y. Miyata, T. Maeda, Y. Mizuguchi, "Fabrication of high-entropy REBa2Cu3O7-delta thin films by pulsed laser deposition", Jpn. J. Appl. Phys. 61, 050905 (2022).
- 13.
A. Yamashita, Y. Shukunami, Y. Mizuguchi, "Improvement of critical current density of REBa2Cu3O7-delta by increase in configurational entropy of mixing", R. Soc. Open Sci. 9, 211874 (2022).
- 12.
M.R. Kasem, A. Yamashita* (Corresponding), T. Hatano, K. Sakurai, N. Oono-Hori, Y. Goto, O. Miura, Y. Mizuguchi, "Anomalous broadening of specific heat jump at Tc in high-entropy-alloy-type superconductor TrZr2", Supercond. Sci. Technol. 34, 125001 (2021).
- 11.
A. Yamashita, Y. Goto, A. Miura, C. Moriyoshi, Y. Kuroiwa, Y. Mizuguchi, "n-type thermoelectric metal chalcogenide (Ag,Pb,Bi)(S,Se,Te) designed by multi-site-type high-entropy alloying", Mater. Res. Lett. 9, 366-372 (2021).
- 10.
A. Yamashita, T.D. Matsuda, Y. Mizuguchi, "Synthesis of new high-entropy alloy-type Nb3(Al, Sn, Ge, Ga, Si) superconductors", J. Alloys Compd. 868, 159233 (2021).
- 9.
A. Yamashita, H. Usui, K. Hoshi, Y. Goto, K. Kuroki, Y. Mizuguchi, "Possible pairing mechanism switching driven by structural symmetry breaking in BiS2-based layered superconductors", Sci. Rep. 11, 230 (2021).
- 8.
A. Yamashita, R. Jha, Y. Goto, A. Miura, C. Moriyoshi, Y. Kuroiwa, C. Kawashima, K. Ishida, H. Takahashi, Y. Mizuguchi, "Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 by external hydrostatic pressure effect", Sci. Rep. 10(1), 12880 (2020).
- 7.
A. Yamashita, R. Jha, Y. Goto, T.D. Matsuda, Y. Aoki, Y. Mizuguchi, "An efficient way of increasing the total entropy of mixing in high-entropy-alloy compounds: NaCl-type (Ag,In,Pb,Bi)Te1-xSex superconductors", Dalton Trans. 49(26), 9118-9122 (2020).
- 6.
A. Yamashita, K. Kihou, H. Kunioka, H. Nishiate, A. Yamamoto, Y. Goto, Y. Mizuguchi, T. Iida, Y. Takano, C.H. Lee, "Thermoelectric properties of NaZn4-xCuxAs3 crystalized in the rhombohedral structure", J. Solid State Chem. 291, 121588 (2020).
- 5.
A. Yamashita, R. Matsumoto, M. Tanaka, H. Hara, K. Iida, B. Holzapfel, H. Takeya, Y. Takano, "Observation of zero resistance in as-electrodeposited FeSe", Solid State Commun. 270, 72-75 (2018).
- 4.
A. Yamashita, O. Ogiso, R. Matsumoto, M. Tanaka, H. Hara, H. Tanaka, H. Takeya, C.H. Lee, Y. Takano, "Influence of oxidation in starting material Sn on electric transport properties of SnSe single crystals", J. Phys. Soc. Jpn. 87, 065001 (2018).
- 3.
A. Yamashita, M. Tanaka, H. Takeya, Y. Takano, "Phase Diagram of FeSe Deposited by Electrochemical Technique with Different Temperature and Voltage", J. Phys. Soc. Jpn. 86(7) (2017).
- 2.
A. Yamashita, S. Demura, M. Tanaka, M. Fujioka, S.J. Denholme, K. Deguchi, T. Yamaki, H. Hara, K. Suzuki, H. Okazaki, T. Yamaguchi, H. Takeya, Y. Takano, "Superconductivity in FeTe1-xSx Induced by Electrochemical Reaction Using Ionic Liquid Solution", J. Phys. Soc. Jpn. 84(3) (2015).
- 1.
A. Yamashita, S. Demura, M. Tanaka, K. Deguchi, T. Yamaki, H. Hara, K. Suzuki, Y. Zhang, S.J. Denholme, H. Okazaki, M. Fujioka, T. Yamaguchi, H. Takeya, Y. Takano, "Superconductivity in FeTe0.8S0.2 induced by battery-like reaction", Solid State Commun. 200, 29-31 (2014).
Commentary / Reviews
- 9.
"Development and Functionality of High-Entropy-Type REBa2Cu3O7-d High-Temperature Superconductors for Fusion Applications," A. Yamashita, Automotive Technology (monthly magazine), June 2025 issue.
- 8.
"Thermoelectric performance of In filling in Co0.33Fe0.33Ni0.33Sb3 skutterudite", P. Rani, A. Yamashita*, A. Seshita, Y. Mizuguchi, Materials Science and Engineering (Account Paper), Vol. 62, No. 2 (2025).
- 7.
"Thermoelectric Properties of High-Entropy-Type Thermoelectric Material AgBiSe2-2xSxTex," A. Seshita, A. Yamashita, T. Fujita, A. Miura, T. Katase, C. Moriyoshi, Y. Kuroiwa, Y. Nakahira, Y. Mizuguchi, Materials Science and Engineering (Review Article), Vol. 61, No. 3 (2024).
- 6.
"Oxygen Nonstoichiometry and Mixed Valence State of Pb in the Superconductivity of (Pb,Cu)Sr2(Y,Ca)Cu2Oz (z=7)," D. Sako, T. Nakano, T. Nakamura, A. Yamashita, T. Maeda, Materials Science and Engineering (Research Article), Vol. 61, No. 3 (2024).
- 5.
"Thermoelectric Conversion and Thermal Switching in Disordered Systems," A. Seshita, A. Yamashita, Y. Mizuguchi, Ceramics Japan (Special Issue), Vol. 59, No. 6 (2024).
- 4.
"Physical Properties and Functionality of High-Entropy-Type REBa2Cu3O7-d High-Temperature Superconductors," A. Yamashita, Materials Science and Engineering (Review Article), Vol. 60, No. 5 (2023).日本材料科学会「奨励賞(末澤賞)」受賞論文
- 3.
"Functionality of High-Entropy-Type Superconductors," A. Yamashita, Magne (Topics), Magnetics Jpn. Vol. 18, No. 3 (2023).
- 2.
"Emergence of Superconductivity via Battery Reaction in Iron Chalcogenide Compounds," A. Yamashita, Y. Takano, Journal of the Japan Institute of Metals and Materials, 80, pp. 468-472 (2016).
- 1.
"Superconductivity in HEA-Type Compounds", Y. Mizuguchi, A. Yamashita, Book: Advances in High-Entropy Alloys — Materials Research, Exotic Properties and Applications (February 2021).
Patents
- 13.
"Rare-Earth Element Selection by Neutron Scattering Cross Section in HE-REBCO," A. Yamashita, K. Muroi, L. Kubota — Filed: 2026/3/25, US Application 64/016,201 (International)
- 12.
"Superconductor, Superconducting Wire, Superconducting Coil, and Method for Manufacturing a Superconductor," A. Yamashita, S. Yamanaka, K. Muroi, N. Hori (Ono), T. Kaneko — Filed: 2026/3/3, PCT/JP2026/008062 (International)
- 11.
"Superconducting Wire, Method for Manufacturing a Superconducting Wire, and Method for Repairing a Cuprate-Based Superconductor," A. Yamashita, K. Muroi — Filed: 2025/12/5, Japan Patent Application No. 2025-236021
- 10.
"Superconductor and Method for Manufacturing a Phase-Separated Superconductor," A. Yamashita, K. Muroi, R. Kobayashi — Filed: 2025/8/29, Japan Patent Application No. 2025-144279
- 9.
"Cuprate-Based Superconductor, Cuprate-Based Superconductor Unit, and Method for Repairing a Cuprate-Based Superconductor," A. Yamashita, S. Yamanaka, K. Muroi — Filed: 2025/6/9, PCT/JP2025/020800 (International)
- 8.
"Laminate and Method for Manufacturing a Laminate," A. Yamashita, S. Yamanaka, K. Muroi — Filed: 2025/6/9, PCT/JP2025/020778 (International)
- 7.
"Superconductor and Method for Manufacturing a Superconductor," A. Yamashita, S. Yamanaka, K. Muroi, N. Hori (Ono), T. Kaneko — Filed: 2025/3/3, Japan Patent Application No. 2025-032960
- 6.
"Laminate and Method for Manufacturing a Laminate," A. Yamashita, S. Yamanaka, K. Muroi — Filed: 2024/6/7, Japan Patent Application No. 2024-093048
- 5.
"Cuprate-Based Superconductor, Cuprate-Based Superconductor Unit, and Method for Repairing a Cuprate-Based Superconductor," A. Yamashita, S. Yamanaka, K. Muroi — Filed: 2024/6/7, Japan Patent Application No. 2024-093062
- 4.
"Superconductor and Method for Manufacturing a Superconductor," A. Yamashita, Y. Mizuguchi, S. Yamanaka, K. Sakurai, N. Ono, T. Maeda — Filed: 2024/5/21, PCT/JP2024/018667 (International)
- 3.
"Superconductor and Method for Manufacturing a Superconductor," A. Yamashita, Y. Mizuguchi, S. Yamanaka, K. Sakurai, N. Ono, T. Maeda — Filed: 2023/5/29, Japan Patent Application No. 2023-087946
- 2.
"Thermoelectric Material, Thermoelectric Conversion Element, Thermoelectric Power Generation Module, and Peltier Cooler," Y. Mizuguchi, A. Yamashita — Filed: 2021/11/30, PCT/JP2021/043983 (International)
- 1.
"Thermoelectric Material, Thermoelectric Conversion Element, Thermoelectric Power Generation Module, and Peltier Cooler," Y. Mizuguchi, A. Yamashita — Filed: 2020/11/30, Japan Patent Application No. 2020-199059
Invited Talks
- 2026
“Functionality and physical property of high-entropy-type REBCO”
A. Yamashita, Symposium: "Electronic correlation, superconductivity, and thermoelectric properties in high entropy alloy materials," 81st Annual Meeting of the Physical Society of Japan, Komaba Campus, The University of Tokyo, 2026/9/15
- 2026
“High-entropy-type functional thin films”
A. Yamashita, KJMST2026, Jeju, Korea, 2026/5/31-6/4
- 2026
“Development of Irradiation-Resistant High-Entropy-Type High-Temperature Superconductors”
A. Yamashita, New Developments in High-Entropy Materials, 37th CCSE Workshop (hosted by JAEA, online), 2026/3/24
- 2026
“Development of Highly Irradiation-Resistant High-Entropy-Type REBCO for Fusion Applications”
A. Yamashita, "R&D on High-Temperature Superconductivity and Nuclear Fusion," 13th Young Researchers' Study Meeting (Tokyo), 2026/3/23
- 2025
“Development of high-entropy-type compounds ~ Thermoelectric materials ~”
A. Yamashita, Pacifichem 2025, Hawaii, USA, 2025/12/14-12/20
- 2025
“Development of High-Entropy-Type Thermoelectric Materials”
A. Yamashita, Materials Science & Technology 2025 (MS&T25), Ohio, USA, 2025/9/28-10/1
- 2025
“New Thermoelectric Materials — High-Entropy-Type Compounds”
A. Yamashita, New Materials Division, The Mining and Materials Processing Institute of Japan, Tokyo, 2025/9/26
- 2025
“Development of High-Entropy-Type Thermoelectric Materials”
A. Yamashita, 38th Ceramic Society of Japan Autumn Symposium, Araki Campus, Gunma University, 2025/9/17-19
- 2025
“Functionality and physical property of High-entropy-type thin films”
A. Yamashita, JKMST2025, Tokyo, Japan, 2025/7/28-31
- 2025
“Overview of High-entropy-type Thermoelectric Materials”
A. Yamashita, ERATO Uchida Magnetic Thermal Materials Project, NIMS, Tsukuba, 2025/3/18
- 2025
“Development of Highly Irradiation-Resistant High-Entropy-Type Cuprate Superconductors for Fusion Reactor Applications”
A. Yamashita, 75th Workshop on New Magnetic Compounds, Suzukakedai Campus, Institute of Science Tokyo, 2025/3/4
- 2024
“Development and Functionality of Cuprate High-Temperature Superconductors Incorporating the High-Entropy Alloy Concept”
A. Yamashita, Cryogenics and Superconductivity Society of Japan, 3rd Materials Workshop, Eikokuji Campus, Kochi University of Technology, 2024/10/18
- 2024
“Development of High-entropy-type REBCO thin films”
A. Yamashita, TMUMS2024, Tokyo, Japan, 2024/9/13-15
- 2024
“Development of high-entropy-type cuprate superconductors”
A. Yamashita, Superstripes2024, Ischia-Naples, Italy, 2024/6/24-29
- 2024
“Development of High-entropy-type superconductors and thermoelectric materials”
A. Yamashita, KJMST2024, Jeju, Korea, 2024/6/10
- 2023
“Development and Overview of High-Entropy Functional Materials”
A. Yamashita, JKMST2023, Kochi, Japan, 2023/8/23
- 2023
“Superconducting Properties of High-Entropy-Type REBa2Cu3O7-d Thin Films”
A. Yamashita, 243rd Workshop / 72nd Workshop on New Magnetic Compounds, Wimm Ochanomizu, 2023/7/21
- 2023
“Analysis of isothermal crystallization of High-entropy-type thermoelectric materials”
A. Yamashita, Symposium and Workshop on Advanced Thermodynamics and Metastability, Hokkaido, 2023/6/29
- 2022
“JST Next-Generation Researchers Challenging Research Program — Research Presentation by Alumni Active in Academia”
A. Yamashita, hosted online by Kochi University of Technology, 2022/11/24
- 2022
“Development of High-Entropy Functional Materials”
A. Yamashita, KJMST2022, Jeju, Korea, 2022/11/10
- 2021
“Switching of the Superconductivity Mechanism Driven by Changes in Crystal Structure Symmetry in BiS2-Based Layered Compounds”
A. Yamashita, Y. Mizuguchi, 68th Workshop on New Magnetic Compound Materials (Online, 2021)
- 2020
“Possible Pairing Mechanism Switching Driven by Structural Symmetry Breaking in (Sr,RE)FBiS2”
A. Yamashita, Y. Mizuguchi, Muroran Institute of Technology Rare Earth Workshop 2020 (Online, 2020)
- 2016
“Electrochemical Synthesis of Iron Chalcogenide Superconductors and Enhancement of Superconducting Property”
A. Yamashita, Y. Takano, Science and Applications of Thin Films 2016, IS12, Izmir, Turkey
Research Funding
Principal Investigator
- 2026 – 2033
JST FOREST Program (Furuhara Panel)
- 2025 – 2027
NEDO Public-Private Program to Discover and Support Young Researchers (Matching Phase)
- 2025 – 2027
TEPCO Memorial Foundation Research Grant (Basic Research)
- 2025 – 2026
FY2025 Frontier Materials Research Institute Collaborative Research Program (General B)
- 2024 – 2025
Thermal & Electric Energy Technology Foundation Research Grant
- 2024 – 2025
Iketani Science and Technology Foundation FY2024 Single-Year Research Grant
- 2023 – 2026
Sohatsu Future Society Research Project (commissioned research by the Tokyo Metropolitan Bureau of Waterworks)
- 2023 – 2025
Asahi Glass Foundation FY2023 Research Grant
- 2022 – 2023
Thermal & Electric Energy Technology Foundation Research Grant
- 2022 – 2025
KAKENHI Grant-in-Aid for Early-Career Scientists
- 2021 – 2022
Iketani Science and Technology Foundation FY2021 Single-Year Research Grant
- 2019
JSPS Research Fellowship (PD) Grant-in-Aid — declined after selection (due to appointment as Project Assistant Professor)
- 2016 – 2019
JSPS Research Fellowship (DC1) Grant-in-Aid
Co-Investigator
- 2021 – 2023
KAKENHI Challenging Research (Exploratory) (PI: Associate Professor Mizuguchi)
Awards
- 2025
Nanoscale Journal Family Poster Prize
ICT/ACT2025 (Sendai)
- 2024
Session Encouragement Award
The Ceramic Society of Japan, 37th Autumn Symposium (Nagoya University)
- 2024
The ICT2024 Outstanding Poster Prize
ICT/ECT2024 (Krakow, Poland)
- 2024
Encouragement Award (Suezawa Award)
Materials Science Society of Japan (review article "Physical Properties and Functionality of High-Entropy-Type REBCO")
- 2018
Best Poster Award
Tsukuba Global Science Week Student Poster Session on Materials Research
- 2018
Excellent Presentation Student Award
NIMS Student Seminar
- 2017
Excellent Presentation Student Award
NIMS Student Seminar
- 2015
Dean's Award, Graduate School of Pure and Applied Sciences, and Selected as Class Representative
University of Tsukuba
- 2014
Excellent Paper Presentation Award
The Institute of Electrical Engineers of Japan (Fundamentals, Materials, and Common Technology Division)
- 2013
President's Award for Outstanding Academic Performance in Major Coursework
Kochi University of Technology
- 2013
Isami Hiroi Award
Kochi University of Technology
Lectures
Courses
- 2025
Fundamentals of Physics Experiments, Session 9: Electrical Conductivity Measurement — Metal Resistance, 2-Terminal and 4-Terminal Methods
Tokyo Metropolitan University, December 5, 2025
- 2025
Open University: Diverse Quantum Phenomena in Materials and Their Applications / From Materials Development to Applied Technology of High-Temperature Superconductors for Fusion Reactors
Tokyo Metropolitan University, November 28, 2025
- 2025
Frontiers of Science and Engineering: Recent Research on High-Temperature Superconductors and Thermoelectric Conversion Materials for Energy Challenges
Kochi University of Technology, July 11, 2025
- 2024
Fundamentals of Physics Experiments, Session 9: Electrical Conductivity Measurement — Metal Resistance, 2-Terminal and 4-Terminal Methods
Tokyo Metropolitan University, December 6, 2024
- 2023
Special Lecture: Building an Academic Career and Research Introduction
Kochi University of Technology, July 11, 2023
- 2022
Special Lecture: Academic Career Development Seminar
Kochi University of Technology, July 12, 2022
- 2016
Career Development Seminar
Kochi University of Technology, 2016
Lab Sessions
- Apr 2025 – Jul 2025
Student Laboratory Course I(Tokyo Metropolitan University)
- Apr 2025 – Jul 2025
Student Laboratory Course III(Tokyo Metropolitan University)
- Oct 2024 – Jan 2025
Student Laboratory Course IV(Tokyo Metropolitan University)
- Apr 2024 – Jul 2024
Student Laboratory Course I(Tokyo Metropolitan University)
- Oct 2023 – Jan 2024
Student Laboratory Course IV(Tokyo Metropolitan University)
- Apr 2023 – Jul 2023
Student Laboratory Course III(Tokyo Metropolitan University)
- Oct 2022 – Jan 2023
Student Laboratory Course IV(Tokyo Metropolitan University)
- Apr 2022 – Jul 2022
Student Laboratory Course III(Tokyo Metropolitan University)
Other Activities
- Committee Member, Magnetics Society of Japan
- Organizer, Workshop on New Magnetic Compound Materials, Magnetics Society of Japan
- Committee Member, International Exchange Committee, Materials Science Society of Japan
- Organizing Committee Member, IBS2app2025