Suguru Yoshida

Thank you for stopping by my personal website 👋 I am a researcher working at the intersection of chemistry and physics, with a deep interest in how the structure of materials gives rise to their diverse and sometimes surprising properties, often governed by underlying symmetries. Drawing on both experimental and theoretical tools, I seek to uncover simple principles behind seemingly intricate materials and to contribute to the broader quest for new and functional states of matter.

Beyond the specifics of any given project, I’m especially drawn to research that reflects a sense of individuality: whether in the questions we ask, the tools we choose, or the perspectives we bring. I believe that science thrives when it embraces curiosity, creativity, and the personal fingerprints that make each line of inquiry unique.

news

Jul 01, 2025	This paper in Dalton Transactions selected as a HOT article!
Jul 01, 2025	Launched my personal website, finally.
Jun 13, 2025	A New Paper “Structural stability and polymorphic transitions in LnSI (Ln = lanthanides)” published in Dalton Transactions.

latest posts

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} }