Suguru Yoshida

Thank you for stopping by my personal website 👋 I am a researcher working at the border of chemistry and physics, with an interest in how the crystal structure gives rise to their diverse and sometimes surprising properties. Using both experimental and theoretical tools, I seek to uncover simple rules behind crystalline solids and to contribute to the quest for new functional materials.

Beyond the details of a project, I’m especially attracted to research that reflects your personality. I am convinced that scientific advancement is fostered when, in addition to curiosity and creativity, the unique contributions of each researcher are fully embraced.

news

Nov 03, 2025	A new arXiv preprint posted.
Oct 14, 2025	A new paper published in Crystal Growth & Design.
Sep 14, 2025	Mini report on the Young Lecture Tour to Europe is now on JST ASPIRE official note.

latest posts

Jul 13, 2025	Let's visualize Brillouin zone with VESTA
Jun 20, 2025	Interaxion Podcast Episode 62: Altermagnet
Apr 10, 2024	Interaxion Podcast Episode 60: Welcome to the Physics World

selected publications

Nat. Commun.
High-entropy engineering of the crystal and electronic structures in a Dirac material

Antu Laha, Suguru Yoshida, Francisco Santos Vieira, Hemian Yi, Seng Huat Lee, Sai Venkata Gayathri Ayyagari, Yingdong Guan, Lujin Min, Jose Gonzalez Jimenez, Leixin Miao, David Graf, Saugata Sarker, Weiwei Xie, Nasim Alem, Venkatraman Gopalan, Cui-Zu Chang, Ismaila Dabo, and Zhiqiang Mao

Nat. Commun., 15 , 3532 (2024).

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A high-entropy strategy is used to engineer Dirac electronic states in topological materials. By mixing Ba, Sr, Ca, Eu, and Yb at the A site of AMnSb₂, a new compound (Ba_0.38Sr_0.14Ca_0.16Eu_0.16Yb_0.16)MnSb₂ is synthesized with a polar structure absent in the parent phases. Despite lattice disorder, the high-entropy crystal retains linear band dispersion. Local distortions transform the original 2D Dirac states into anisotropic quasi-3D ones, as shown by quantum oscillation measurements. This work highlights high-entropy design as a promising route to tune structure and electronic properties in Dirac semimetals.
@article{Laha2024NC, title = {High-entropy engineering of the crystal and electronic structures in a Dirac material}, author = {Laha, Antu and Yoshida, Suguru and Marques dos Santos Vieira, Francisco and Yi, Hemian and Lee, Seng Huat and Ayyagari, Sai Venkata Gayathri and Guan, Yingdong and Min, Lujin and Gonzalez Jimenez, Jose and Miao, Leixin and Graf, David and Sarker, Saugata and Xie, Weiwei and Alem, Nasim and Gopalan, Venkatraman and Chang, Cui-Zu and Dabo, Ismaila and Mao, Zhiqiang}, journal = {Nat. Commun.}, publisher = {Nature Publishing Group}, volume = {15}, number = {1}, pages = {3532}, month = apr, year = {2024}, language = {en}, doi = {10.1038/s41467-024-47781-9} }
PRL
Electronic Origin of Non-Zone-Center Phonon Condensation: Octahedral Rotation as a Case Study

Suguru Yoshida, Hirofumi Akamatsu, and Katsuro Hayashi

Phys. Rev. Lett., 127 , 215701 (2021).

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Zone-boundary phonon modes drive structural distortions linked to functional properties, but their quantum-mechanical origin has remained unclear. This study proposes that bonding interactions between Bloch states at different wave vectors cause these instabilities via the second-order Jahn–Teller effect. First-principles calculations and group-theoretical analysis demonstrate that classic octahedral rotations result from this mechanism. The proposed framework applies broadly to non-zone-center phonon condensations and offers a unified perspective on structural phase transitions in crystalline materials.
@article{Yoshida2021PRL, title = {Electronic Origin of Non-Zone-Center Phonon Condensation: Octahedral Rotation as a Case Study}, author = {Yoshida, Suguru and Akamatsu, Hirofumi and Hayashi, Katsuro}, journal = {Phys. Rev. Lett.}, volume = {127}, number = {21}, pages = {215701}, month = nov, year = {2021}, language = {en}, doi = {10.1103/PhysRevLett.127.215701}, }
JACS
Hybrid Improper Ferroelectricity in (Sr,Ca)₃Sn₂O₇ and Beyond: Universal Relationship between Ferroelectric Transition Temperature and Tolerance Factor in n = 2 Ruddlesden-Popper Phases

Suguru Yoshida, Hirofumi Akamatsu, Ryosuke Tsuji, Olivier Hernandez, Haricharan Padmanabhan, Arnab Sen Gupta, Alexandra S. Gibbs, Ko Mibu, Shunsuke Murai, James M. Rondinelli, Venkatraman Gopalan, Katsuhisa Tanaka, and Koji Fujita

J. Am. Chem. Soc., 140 , 15690–15700 (2018).

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Hybrid improper ferroelectricity, driven by octahedral rotations, offers a promising pathway for discovering new ferroelectrics. While group theory and first-principles methods aid in structural predictions, they often fall short in estimating key parameters like the Curie temperature (T_C). Using (Sr_1−xCaₓ)₃Sn₂O₇ as a model system, we establish a clear, linear relationship between T_C and the Goldschmidt tolerance factor t, purely calculated from ionic size. This correlation extends across known A₃B₂O₇ hybrid improper ferroelectrics, offering a simple, predictive tool for T_C based on crystal chemistry.
@article{Yoshida2018JACS, title = {Hybrid Improper Ferroelectricity in (Sr,Ca)3Sn2O7 and Beyond: Universal Relationship between Ferroelectric Transition Temperature and Tolerance Factor in n = 2 Ruddlesden-Popper Phases}, author = {Yoshida, Suguru and Akamatsu, Hirofumi and Tsuji, Ryosuke and Hernandez, Olivier and Padmanabhan, Haricharan and Sen Gupta, Arnab and Gibbs, Alexandra S. and Mibu, Ko and Murai, Shunsuke and Rondinelli, James M. and Gopalan, Venkatraman and Tanaka, Katsuhisa and Fujita, Koji}, journal = {J. Am. Chem. Soc.}, volume = {140}, number = {46}, pages = {15690--15700}, month = nov, year = {2018}, language = {en}, doi = {10.1021/jacs.8b07998} }