Publication

日本語/English

Preprints


Peer Reviewed Journal Articles

  1. Magnetic edge fields in UTe2 near zero background fields
    Y. Iguchi, H. Man, S. M. Thomas, F. Ronning, J. Ishizuka, M. Sigrist, P.F.S. Rosa, and K. A. Moler
    Physical Review B 110, 214505 (2024).  [arXiv]
    Magnetic edge fields can be created by intrinsic chiral edge currents or extrinsic meissner screening current with magnetic impurities. The latter might caused edge fields observed on UTe2.
  2. Superconducting Penetration Depth Through a Van Hove Singularity: Sr2RuO4 Under Uniaxial Stress
    E. Mueller, Y. Iguchi, F. Jerzembeck, J.O. Rodriguez, M. Romanelli, E. Abarca-Morales, A. Markou, N. Kikugawa, D.A. Sokolov, G. Oh, C.W. Hicks, A.P. Mackenzie, Y. Maeno, V. Madhavan, and K.A. Moler
    Physical Review B 110, L100502 (2024).  [arXiv]

    [Editors' Suggestion]
    [Letter]

  3. Anomalous superfluid density in a disordered charge density wave material: Pd-intercalated ErTe3
    Y. Iguchi, J.A. Straquadine, C. Murthy, S.A. Kivelson, A. Singh, I.R. Fisher, and K.A. Moler
    Physical Review Letters 133, 036001 (2024).  [arXiv]

    [Editors' Suggestion]
    [On the Cover]
    Research Highlights: Stanford Institute for Materials and Energy Sciences (SIMES)

    The temperature dependence of the superfluid density ns in PdxErTe3 is consistent with the Quantum Rotor Model(QRM) in a 2D lattice, including quantum and thermal phase fluctuations, rather than the BCS model.
  4. In situ local imaging of ferromagnetism and superconductivity in RbEuFe4As4
    H. Man, Y. Iguchi, J. Bao, D.Y. Chung, and M.G. Kanatzidis
    Nano Letters 24, 9082 (2024).  [arXiv]
  5. Scanning SQUID study of ferromagnetism and superconductivity in infinite-layer nickelates
    R. A. Shi, B. Y. Wang, Y. Iguchi, M. Osada, K. Lee, B. H. Goodge, L. F. Kourkoutis, H. Y. Hwang, and K. A. Moler
    Physical Review Materials 8, 024802 (2024).  [arXiv]

    [Editors' Suggestion]

  6. Constraints on a split superconducting transition under uniaxial strain in Sr2RuO4 from scanning SQUID microscopy
    E. Mueller,Y. Iguchi, C. Watson, C. Hicks, Y. Maeno, and K. A. Moler
    Physical Review B 108, 144501 (2023).  [arXiv]

    [Editors' Suggestion]

  7. Superconducting vortices carrying a temperature-dependent fraction of the flux quantum
    Y. Iguchi, R. A. Shi, K. Kihou, C.-H. Lee, M. Barkman, A. L. Benfenati, V. Grinenko, E. Babaev, and K. A. Moler
    Science 380, 1244-1247 (2023).  [arXiv]

    UJA Outstanding Paper Award 2024 (in Physics)
    Research Highlights: Stanford Institute for Materials and Energy Sciences (SIMES)
    Press release(by KTH), (TD Lee): EurekAlert!, PHYS.ORG
    Commentary: "Un-quantized Vortices Observed", Journal Club for Condensed Matter Physics

    Un-quantized vortex
  8. Microscopic imaging homogeneous and single phase superfluid density in UTe2
    Y. Iguchi, H. Man, S. M. Thomas, F. Ronning, P.F.S. Rosa, and K. A. Moler
    Physical Review Letters 130, 196003 (2023).  [arXiv]

    Research Highlights: Stanford Institute for Materials and Energy Sciences (SIMES)

    Single phase superfluid density in UTe2
  9. Nonreciprocal microwave response at room temperature in multiferroic Y-type hexaferrite BaSrCo2Fe11AlO22
    S. Hirose, Y. Iguchi, Y. Nii, T. Kimura, and Y. Onose
    Applied Physics Letters 121, 222401 (2022).

    [Editor's picks]

  10. Local observation of linear-T superfluid density and anomalous vortex dynamics in URu2Si2
    Y. Iguchi, I. P. Zhang, E. D. Bauer, F. Ronning, J. R. Kirtley, and K. A. Moler
    Physical Review B 103, L220503 (2021).  [arXiv]

    [Letter]
    Anomalous vortex dynamics in URu2Si2 (Application Snippets:Nanopositioners at attocube)

    SSM on URu2Si2
  11. Imaging anisotropic vortex dynamics in FeSe
    I. P. Zhang, J. C. Palmstrom, H. Noad, L. B.-V. Horn, Y. Iguchi, Z. Cui, E. Mueller, J. R. Kirtley, I. R. Fisher, and K. A. Moler
    Physical Review B 100, 024514 (2019).　 [arXiv]
  12. Microwave non-reciprocity of magnon excitations in a non-centrosymmetric antiferromagnet Ba2MnGe2O7
    Y. Iguchi, Y. Nii, M. Kawano, H. Murakawa, N. Hanasaki, and Y. Onose
    Physical Review B 98, 064416 (2018).　 [arXiv]
    Nonreciprocity in AFM
  13. Magnetoelectrical control of nonreciprocal microwave response in a multiferroic helimagnet
    Y. Iguchi, Y. Nii, and Y. Onose
    Nature Communications 8, 15252 (2017).  [arXiv]

    News Release:University of Tokyo, Nikkei(2017/5/8), Nikkan(2017/5/11)

    ME control microwave nonreciprocity
  14. Microwave Magneto-Chiral Effect in a Noncentro-symmetric Magnet CuB2O4
    Y.Nii, R. Sasaki, Y. Iguchi, and Y. Onose
    Journal of the Physical Society of Japan 86, 024707 (2017).  [arXiv]

    [Editors' choice]
    News release:"Magnet as a Switchable One-way Street", JPSJ News and Comments, 14, 01(2017)., Nikkan(2017/2/3)

  15. Nonreciprocal propagation of surface acoustic wave in Ni/LiNbO3
    R. Sasaki, Y. Nii, Y. Iguchi, and Y. Onose
    Physical Review B 95, 020407(R) (2017).  [arXiv]

    [Rapid Communication]

  16. Terahertz Radiation by Subpicosecond Magnetization Modulation in the Ferrimagnet LiFe5O8
    Y. Kinoshita, N. Kida, M. Sotome, T. Miyamoto, Y. Iguchi, Y. Onose, and H. Okamoto
    ACS Photonics 3, 1170 (2016).

    [Letter]

  17. Nonreciprocal magnon propagation in a noncentrosymmetric ferromagnet LiFe5O8
    Y. Iguchi, S. Uemura, K. Ueno, and Y. Onose
    Physical Review B 92, 184419 (2015).  [arXiv]

    Commentary(in Japanese):Kotai Buturi vol.51 No.7(605) (2016)

    magnon nonreciprocity in chiral FM
  18. Uniaxial-Pressure Effects on Spin-Driven Lattice Distortions in Geometrically Frustrated Magnets CuFe1-xGaxO2 (x=0, 0.035)
    T. Nakajima, Y. Iguchi, H. Tamatsukuri, S. Mitsuda, Y. Yamasaki, H. Nakao, and N. Terada
    Journal of the Physical Society of Japan 82, 114711 (2013).



Invited Talk

    Upcoming
  1. Magnetic Imaging Chiral Superconductors and Un-quantized Vortex
    Beyond standard superconducting and superfluid states: electron quadrupling condensates and composite orders, Nordita, Stockholm, Sweden, May 19-23, 2025
  2. Un-quantized Vortex and Edge Fields in Multicomponent Superconductors
    The International Conference on Superconductivity and Magnetism (ICSM) 2025, Fethiye, Turkey, Session: Multicomponent superconductivity and related phenomena
  3. Magnetic Imaging of Chiral and Magnetic Superconductors
    2025 Materials Research Society(MRS) Spring Meeting, Seattle, WA, Symposium: EL07-Superconducting Materials
    4. Past
  4. Anomalous Superfluid Density in Quasi-2D Superconductors PdxErTe3
    He Lab Seminar, Yale University, CT, Jun 18, 2024
  5. Superconducting vortices carrying a temperature-dependent fraction of the flux quantum
    UJA Outstanding Paper Award 2024 Ceremony, Award Ceremony in Physics, May 12, 2024
  6. Superconducting vortices carrying a temperature-dependent fraction of the flux quantum
    American Physical Society March Meeting 2024(Minneapolis), M41.00005
  7. Observation of Unquantized Vortices in Superconductor
    Quantum Seminar, Tsung-Dao Lee Institute (online), Oct 11, 2023
  8. Observation of Un-quantized Fluxes in Superconducting Vortices
    7th KUJI QMAT Seminar, Cambridge, Kyoto, Seoul, and Salerno (online), Sep 7, 2023
  9. Microscopic imaging homogeneous and single phase superfluid density in UTe2
    UTe2 seminar (online), Tohoku University and University of Grenoble Alpes, Dec 7, 2022
  10. Scanning SQUID microscopy on unconventional superconductors
    Onose Lab seminar, Institute for Material Research, Tohoku University, Aug 29, 2022
  11. Scanning SQUID microscopy on chiral superconductor candidates
    Matsueda Lab seminar, Tohoku University, Aug 26, 2022
  12. Non-reciprocity of magnon excitations in non-centrosymmetric magnets
    59th Risou Dr group commemorative lecture, Tokyo University of Science, Tokyo(+online), 2021, 1
  13. Scanning SQUID Microscopy on Chiral Superconductor Candidates Sr2RuO4 and URu2Si2
    32nd International Symposium on Superconductivity 2019(Kyoto), PC1-1-INV
  14. Nonreciprocal microwave responses in noncentrosymmetric magnets
    NTT Basic Research Laboratories, Japan, March 22, 2017.



Contributed Talks and Posters

  1. Visualizing Dynamics of Vortex Clusters in Multiband Superconductor CaSb2
    Y. Iguchi, N. Nandi, M. Oudah, J. Bannies, M. C. Aronson, D. A. Bonn, and K. A. Moler
    American Physical Society March Meeting 2024(Minneapolis), Session Q15.00012
  2. Superconducting Penetration Depth Through a Van Hove Singularity: Sr2RuO4 Under Uniaxial Stress
    E. Mueller, Y. Iguchi, F. Jerzembeck, J.O. Rodriguez, M. Romanelli, E. Abarca-Morales, A. Markou, N. Kikugawa, D.A. Sokolov, G. Oh, C.W. Hicks, A.P. Mackenzie, Y. Maeno, V. Madhavan, and K.A. Moler
    American Physical Society March Meeting 2024(Minneapolis), Session K16.00011
  3. Microscopic source of quasiparticle loss in tantalum resonators
    F. Bahrami, N. Shumiya, M. Bland, R. Chang, R. A. McLellan, K. D. Crowley, C. Yang, L. Bishop-Van Horn, Y. Iguchi, K. A. Moler, R. J Cava, A. A. Houck, and N. P. de Leon
    American Physical Society March Meeting 2024(Minneapolis), Session M47.00011
  4. Superconducting vortices carrying a temperature-dependent fraction of the flux quantum, (Poster)
    Y. Iguchi
    Aspen Center for Physics -2024 Winter Conference Disorder and Quantum Phases of Matter, Poster Session 12
  5. Observation of superconducting vortices carrying a temperature-dependent fraction of the flux quantum
    Y. Iguchi, R.A. Shi, K. Kihou, C.-H. Lee, V. Grinenko, E. Babaev, and K. A. Moler
    American Physical Society March Meeting 2023(Las Vegas), Session Y28.00004
  6. Constraints on a split superconducting transition under uniaxial strain in Sr2RuO4 from scanning SQUID microscopy
    E. Mueller,Y. Iguchi, C. Watson, C. Hicks, Y. Maeno, and K. A. Moler
    American Physical Society March Meeting 2023(Las Vegas), Session Y22.00008
  7. Direct observation of vortices in infinite-layer nickelate superconductors, (Oral)
    R. Shi, K. Lee, B.Y. Wang, Y. Iguchi, H. Y. Hwang, K. Moler
    American Physical Society March Meeting 2023(Las Vegas), Session S19.00006
  8. Imaging edge fields on chiral superconductor candidate UTe2, (Oral)
    Y. Iguchi
    29th International Conference on Low Temperature Physic (LT29) at Sapporo, Session 22A-SF2A-03
  9. Microscopic imaging of UTe2 by scanning SQUID microscopy, (Oral)
    Y. Iguchi, H. Man, S.M. Thomas, F. Ronning, P. Rosa, K. Moler
    American Physical Society March Meeting 2022(Chicago), Session Y65.00002
  10. Superconductivity coexisting with ferromagnetic order in RbEuFe4As4 studied by scanning SQUID microscopy, (Oral)
    H. Man, Y. Iguchi, J. Bao, D.Y. Chung, M.G. Kanatzidis, K. Moler
    American Physical Society March Meeting 2022(Chicago), Session W69.00012
  11. Coexistence of ferromagnetism and superconductivity in infinite-layer nickelates, (Oral)
    R. Shi, B.Y. Wang, Y. Iguchi, M. Osada, K. Lee, H. Y. Hwang, K. Moler
    American Physical Society March Meeting 2022(Chicago), Session T57.00005
  12. Non BCS-like superfluid density in a disordered charge density wave material: Pd-intercalated ErTe3, (Oral)
    Y. Iguchi, J.A. Straquadine, J.R. Kirtley, A. Singh, I.R. Fisher, and K.A. Moler
    American Physical Society March Meeting 2021(Online), Session A47.00008, (Video)
  13. Effect of uniaxial strain on the superconducting state of Sr2RuO4, (Oral)
    E. Mueller, Y. Iguchi, C. Watson, C.W. Hicks, Y. Maeno, and K.A. Moler
    American Physical Society March Meeting 2021(Online), Session V47.00002, (Video)
  14. Visualizing anomalous vortex dynamics and coexisting ferromagnetic domains in URu2Si2, (Poster)
    Y. Iguchi
    Fundamentals of Quantum Materials(FQM) 2020 Winter School (University of Maryland) Poster session
  15. Local rotational symmetry breaking of superconducting phase in URu2Si2, (Oral,Poster)
    Y. Iguchi
    CIFAR QM(Canadian Institute of Foundation for Advanced Research Quantum Materials) Program Meeting 2019 (Vancouver), Poster session
    CIFAR QM Summer school 2019(University of British Columbia), Oral and Poster session
  16. Imaging Anisotropic Vortex Motion in FeSe, (Poster)
    I. Zhang, L. B.-V. Horn, J. Palmstrom, J. R. Kirtley, Y. Iguchi, I. R. Fisher, K. A. Moler
    XVII International Workshop on Vortex Matter in Superconductors (Vortex 2019) (Antwerp), Poster Session RSP.22
  17. Study of chiral d-wave superconductor candidate URu2Si2 by using scanning SQUID microscopy, (Oral)
    Y. Iguchi, I.P. Zhang, E.D. Bauer, F. Ronning, J.R. Kirtley, and K.A. Moler
    American Physical Society March Meeting 2019(Boston), Session X08.00010
  18. Anisotropic Vortex Pinning in Single Crystal FeSe, (Oral)
    I. Zhang, L. B.-V. Horn, J. Palmstrom, J. R. Kirtley, Y. Iguchi, I. R. Fisher, K. A. Moler
    American Physical Society March Meeting 2019(Boston), Session X10.00010
  19. Non-reciprocal microwave response of antiferromagnetic magnons in a multiferroic Ba2MnGe2O7, (Oral)
    Y. Iguchi, Y. Nii, H. Murakawa, N. Hanasaki, and Y. Onose
    American Physical Society March Meeting 2018(Los Angeles), Session H23.00009
  20. Microwave response of antiferromagnetic magnons in a multiferroic Ba2MnGe2O7, (Poster)
    Y. Iguchi, Y. Nii, and Y. Onose
    Junjiro Kanamori Memorial International Symposium 2017(Tokyo), Poster session:P56
  21. Magnetoelectrical control of nonreciprocal microwave response in a multiferroic helimagnet, (Oral)
    Y. Iguchi, Y. Nii, and Y. Onose
    American Physical Society March Meeting 2017(New Orleans), Session F50.00008
  22. Nonreciprocal propagation of surface acoustic waves in Ni/LiNbO3, (Oral)
    R. Sasaki, Y. Nii, Y. Iguchi, and Y. Onose
    American Physical Society March Meeting 2017(New Orleans), Session A47.00013
  23. Magnetoelectrical control of nonreciprocal microwave response in a multiferroic helimagnet, (Poster)
    Y. Iguchi
    CEMS-QPEC Symposium on Emergent Quantum Materials 2017(Tokyo), Poster session:P29
  24. Nonreciprocal magnon propagation in a noncentrosymmetric ferromagnet LiFe5O8, (Oral)
    Y. Iguchi, S. Uemura, K. Ueno, and Y. Onose
    American Physical Society March Meeting 2016(Baltimore), Session B6.00002



Contributed Talks (in Japanese)

  1. Superconducting vortices carrying a temperature-dependent fraction of the flux quantum, (Oral)
    Y. Iguchi, R.A. Shi, K. Kihou, C.-H. Lee, M. Barkman, A. Benfenati, V. Grinenko, E. Babaev, and K. A. Moler
    The Physical Society of Japan, 78th Ann. Meeting (2023) (Tohoku Univ.), Div.6, 16aB101-5
  2. Scanning SQUID microscopy study of local superconducting state of chiral superconductor candidate UTe2, (Oral)
    Y. Iguchi, H. Man, S.M. Thomas, F. Ronning, J. Ishizuka, M. Sigrist, P.F.S. Rosa, and K.A. Moler
    The Physical Society of Japan, Autumn Meeting 2022(Tokyo Tech), Division 8, 12pW521-5
  3. Non BCS-like superfluid density in a disordered charge density wave material: Pd-intercalated ErTe3, (Oral)
    Y. Iguchi, J.A. Straquadine, J.R. Kirtley, A. Singh, I.R. Fisher, and K.A. Moler
    The Physical Society of Japan, 76th Annual Meeting (Online), Division 6, 14aF1-1
  4. Study of chiral d-wave superconductor candidate URu2Si2 by using scanning SQUID microscopy, (Oral)
    Y. Iguchi, I.P. Zhang, E.D. Bauer, F. Ronning, J.R. Kirtley, and K.A. Moler
    The Physical Society of Japan, 74th Annual Meeting (Kyushu Univ.), Division 8, 14aS302-8
  5. Microwave response to antiferromagnetic resonance in multiferroics Ba2MnGe2O7, (Oral)
    Yusuke Iguchi, Yoichi Nii, and Yoshinori Onose
    The Physical Society of Japan, Autumn Meeting 2017 (Iwate Univ.), Division 8, 23aE31-8
  6. Research of microwave nonreciprocity on a multiferroic using a superconducting circuit resonator,(Oral)
    Yoshiaki Hamahara, Yoichi Nii, Yusuke Iguchi, and Yoshinori Onose
    The Physical Society of Japan, Autumn Meeting 2017 (Iwate Univ.), Division 8, 22pF21-11
  7. Electric control of nonreciprocal microwave response in ferroelectric spiral magnet, (Oral)
    Yusuke Iguchi, Yoichi Nii, and Yoshinori Onose
    The Physical Society of Japan, Autumn Meeting 2016 (Kanazawa Univ.), Division 3, 13aAA-8
  8. Microwave response of a noncentrosymmetric magnet CuB2O4, (Oral)
    Y. Nii, R. Sasaki, Y. Iguchi, and Y. Onose
    The Physical Society of Japan, Annual (71st) Meeting (Tohoku Gakuin Univ.), Division 3, 22aAU-2
  9. Magnetoelastic coupling and nonreciprocity of surface acoustic wave on Ni/LiNbO3, (Oral)
    R. Sasaki, Y. Nii, Y. Iguchi, and Y. Onose
    The Physical Society of Japan, Annual(71st) Meeting (Tohoku Gakuin Univ.), Division 3, 19aAU-11
  10. Magnetization dynamics in ferrimagnetic LiFe5O8 extracted from analyzing terahertz radiation by fast magnetization modulation via femtosecond laser irradiation, (Oral)
    Y. Kinoshita, N. Kida, T. Miyamoto, H. Yada, Y. Iguchi, Y. Onose, and H. Okamoto
    The Physical Society of Japan, Autumn Meeting 2015 (Kansai Univ.), Division 5, 16pCF-9
  11. Nonreciprocal microwave response on large wave number magnon modes in a noncentrosymmetric ferromagnet LiFe5O8, (Oral)
    Yusuke Iguchi, Souichiro Uemura, Kazunori Ueno, and Yoshinori Onose
    The Physical Society of Japan, Annual (70th) Meeting (Waseda Univ.), Division 3, 24aAD-6
  12. Terahertz radiation due to ultrafast modulation of magnetization in ferrimagnetic LiFe5O8, (Oral)
    Y. Kinoshita, N. Kida, T. Miyamoto, H. Yada, Y. Iguchi, Y. Onose, and H. Okamoto
    The Physical Society of Japan, Annual (70th) Meeting (Waseda Univ.), Division 5, 23pCP-6
  13. Microwave response of noncentrosymmetric magnet LiFe5O8,(Oral)
    Yusuke Iguchi and Yoshinori Onose
    The Physical Society of Japan, Annual (69th) Meeting (Tokai Univ.), Division 3 and 8, 29pAY-6
  14. X-ray diffraction measurements on frustrated magnets CuFe1-xGaxO2 (x=0,0.035) under uniaxial pressure, (Oral)
    Taro Nakajima, Yusuke Iguchi, Hiromu Tamatsukuri, Setsuo Mitsuda, Yuichi Yamasaki, Hironori Nakao, and Noriki Terada
    The Physical Society of Japan, Autumn Meeting 2013 (Tokushima Univ.), Division 3, 25aKF-4



Outreach

  • Japanese Academic Seminars at Stanford, CA
    Co-Founder & Organizer, 2022/6-present
    Establishment and management of JASS, composed of top scientists from various fields including physics, engineering, mathematics, data science, and medicine. Monthly research presentations and social gatherings are held as a unique networking platform for conducting research across disciplinary boundaries. (340 members)
    JASS logo
  • United Japanese researchers Around the world(UJA)
    Project Leader, WG10, 2024/1–present
    Launching of the subgroup ”Community Launching Support”
    Vice Chair, WG7, 2024/8–present
    Management of UJA outstanding paper award 2025 as Leader of North California Area.
    UJA logo
  • Girls Who Code in Japanese
    Co-Founder, 2022/7–present
    Japanese translation of Girls Who Code materials and demonstration classes using those materials. (link to translated materials)
    GWCJ logo
  1. Discover the Dream Technology: Do you know about Superconductivity?
    Lecture for 8 visiting 4th and 5th grade students from Japan, Apr 2024
    Stanford University, CA, USA
  2. Methods of Measuring Superconductors at Stanford
    Voluntary lecture and Lab tour for 5 visiting high school students from Japan and Gun High school, Mar 2024
    Stanford University, CA, USA
  3. Unleashing Children's Potential: How to Raise Kids Who Love Math!
    ECC webinar, Dec 2023 (Archive)
  4. The Interaction Crisis: Reshaping synchronous online education
    Invited speaker, SpatialChat webinar, Nov 2023
  5. Methods of Measuring Superconductors at Stanford
    JASS special lecture for 14 visiting senior students from Dept. of Business, Ritsumeikan University, Sep 2023
    Stanford University, CA, USA
  6. Unlocking the Mystery of Magnetic Trapping: Insights from Superconducting Vortices
    12th Japanese Academic Seminars at Stanford, July 2023
    Stanford University, CA, USA
  7. Build LED light-up circuits
    nano@stanford, Guest Teacher, May 2022
    Greenleaf TK-8 School, CA, USA
  8. Q&A session about State of Matter
    Skype a Scientist, Guest Teacher, Dec 2021
    Chardon Primary School, NE, USA(on Skype)
  9. Persistent electrical current
    Berkeley Japanese Academic Network 73rd gathering, 2021
    UC Berkeley, CA, USA(on Zoom)
  10. Learning Superconductivity by Imaging
    11th Stanford Visitors Meetup, 2019
    Stanford University, CA, USA
  11. Looking into the world of superconductivity by using a scanning SQUID microscope
    Berkeley Japanese Academic Network 56th gathering, 2019
    UC Berkeley, CA, USA
  12. Study of "unconventional" superconductors using scanning SQUID microscopy
    JSPS Researcher Gatherings 2019 summer, research introduction, 2019 (Oral)
    Berkeley, CA, USA

(C) 2018 YIguchi-condmat
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