CV

Education

• Ph.D. in Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, 2026.4–2029.3 (expected)
• M.S. in Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, 2024.4–2026.3 (expected)
• B.S. in School of Science, Yokohama City University, 2020.4–2024.3

Work experience

• Research Assistant (RA), 2025.2–2025.3
  • Hokkaido University
  • Duties included:
    1. Mean-field calculation of skyrmion lattice
    2. Assembling and maintaining high-spec workstations for scientific computation
  • Supervisor: Prof. Dr. S. Hayami

Skills

• Coding
  • Mathematica
  • Python
• Language
  • Chinese: Native speaker
  • Japanese: Professional working proficiency (Certificate of Japanese-Language Proficiency: N1 (152/180), credential ID: N1A180545J)
  • English: Limited working proficiency (TOEIC Listening & Reading Official Score Certificate: Total Score 845)
• Sport
  • Yokohama City University Table Tennis Club, 2021.9–2024.3
  • Yokohama City University Medical Table Tennis Club, 2022.8–2024.3
• Photograph

Publications

Effects of crystal field and momentum-based frustrated exchange interactions on multiorbital square skyrmion lattice

Y. S. Zha and S. Hayami, Effects of crystal field and momentum-based frustrated exchange interactions on multiorbital square skyrmion lattice (2025), arXiv:2511.05896 [cond-mat.str-el].

Square skyrmion lattice in multiorbital $f$-electron systems

Y. Zha and S. Hayami, Square skyrmion lattice in multiorbital $f$-electron systems, Phys. Rev. B \bf{111}, 165155 (2025).

Presentations

The Physical Society of Japan 2025 Annual Meeting

September 16, 2025

Oral presentation (Title: 'Effects of Crystal Field and Momentum-Based Frustrated Interaction on Multiorbital Square Skyrmion Lattice') at 19aSK314, Hiroshima University, Higashihiroshima, Hiroshima, Japan

The Physical Society of Japan 2025 Spring Meeting Online Virtual Meeting

February 18, 2025

Oral presentation (Title: 'Mean-field analysis of a square skyrmion lattice in multi-orbital $f$-electron systems') at Online, Online

Workshop on theory of cross correlations, multipoles, and computational material design

February 16, 2025

Poster presentation (Title: 'Mean-field analysis of a square skyrmion lattice in multi-orbital $f$-electron systems') at Gotemba Tokinosumika, Gotemba, Shizuoka, Japan

Asymmetry Autumn School

September 20, 2024

Seminar attendance at National Taisetsu Youth Friendship Center, Biei, Hokkaido, Japan

Notes

From Classical Heisenberg Model to Spiral Magnetism

October 17, 2024

One-Dimensional Ising Model: Phase Transition, Symmetry Breaking, and the Critical Exponent of Heat Capacity at Constant Volume

October 17, 2024

Scholarships & Tuition Fee Waiver

• Scholarships
  • JEES Scholarships, 40k yen/month for 2 years, Japan Educational Exchanges and Services (JEES), 2021.4–2023.3
• Tuition Fee Waiver
  • HU Tuition Fee Waiver (1/4 of the amount), Hokkaido University, 2025.4–2025.9
  • HU Tuition Fee Waiver (full amount, maximum), Hokkaido University, 2024.10–2025.3
  • YCU Tuition Fee Reduction (1/2 of the amount, maximum), Yokohama City University, 2023.4–2024.3
  • YCU Tuition Fee Reduction (1/2 of the amount, maximum), Yokohama City University, 2022.4–2023.4
  • YCU Tuition Fee Reduction (1/2 of the amount, maximum), Yokohama City University, 2021.4–2022.3
  • YCU Tuition Fee Reduction (full amount, maximum), Yokohama City University, 2020.4–2021.3

Service and leadership

• Updating…