Publications and Research Topics

For new work, see the following Google Scholar and arXiv links:

https://scholar.google.com/citations?user=zGBj_fsAAAAJ&hl=en

https://arxiv.org/find/cond-mat/1/au:+Kimchi_I/0/1/0/all/0/1

Selected work of the Kimchi group at Georgia Tech:  (not updated regularly)

  1. Chirality reversal at finite magnetic impurity strength and local signatures of a topological phase transition, Ruiqi Xu, Arnab Seth, and Itamar Kimchi, 2025. Chirality reversal critical point for Dirac fermions with dilute impurities.
  2. Disorder-induced spin-cluster magnetism in a doped kagome spin liquid candidate, Arnab Seth, Joseph C. Prestigiacomo, Aini Xu, Zhenyuan Zeng, Trevor D. Ford, B.S. Shivaram, Shiliang Li, Patrick A. Lee, Itamar Kimchi, 2024. Controlled understanding of disorder via unusual magnetism in a material family with QSL (quantum spin liquid) candidates.
  3. Real-space chirality from crystalline topological defects in the Kitaev spin liquid | npj Quantum Materials, Fay Borhani, Arnab Seth & Itamar Kimchi, npj Quantum Materials volume 10: 43 (2025). Topological defects in a QSL and measures of local emergent time reversal breaking.
  4. Crystalline topological defects within response theory | Phys. Rev. B ,  Sami Hakani and Itamar Kimchi, Phys. Rev. B 109, 224414 (2024). Coupling of certain crystallographic defects to Raman scattering probes for quantum paramagnets.
  5. Control of chiral orbital currents in a colossal magnetoresistance material | Nature
    Yu Zhang, Yifei Ni, Hengdi Zhao, Sami Hakani, Feng Ye, Lance DeLong, Itamar Kimchi & Gang Cao
    Nature volume 611, pages 467–472 (2022). Colossal magnetoresistance whose colossal anisotropy eliminates usual manganite double-exchange mechanisms, but instead suggests explanations based on chiral orbital loop currents. 

Selected prior work:

  1. Anomalous localization at the boundary of an interacting topological insulator | Phys. Rev. B, Itamar Kimchi, Yang-Zhi Chou, Rahul M. Nandkishore, and Leo Radzihovsky, Phys. Rev. B 101, 035131 (2020). Interaction and disorder on 2D TI boundary can test what is permitted by anomaly-based LSM.
  2. Robust non-Abelian spin liquid and a possible intermediate phase in the antiferromagnetic Kitaev model with magnetic field | Phys. Rev. B, Zheng Zhu, Itamar Kimchi, D. N. Sheng, and Liang Fu,
    Phys. Rev. B 97, 241110(R) – (2018).   Our original discovery of the field-induced phase.
  3. Valence Bonds in Random Quantum Magnets: Theory and Application to YbMgGaO4, I Kimchi, A Nahum, T Senthil, Physical Review X 8 (3), 031028 (2018).   Theory of weak disorder in many 2D quantum paramagnets and disordered-LSM conjecture + theorem.
  4. Scaling and data collapse from local moments in frustrated disordered quantum spin systems, I. Kimchi, J.P. Sheckelton, T.M. McQueen, P.A. Lee, Nature Communications 9, 4367 (2018). Application of theory above to data collapse and scaling functions of emergent random singlets in frustrated magnets.
  5. Physics of the Kitaev model: fractionalization, dynamic correlations, and material connections, M Hermanns, I Kimchi, J Knolle, Annual Review of Condensed Matter Physics 9, 17-33 (2018). Itamar Kimchi. Invited Review article covering the Kitaev model and candidate materials.