# Natalia Perkins

## Natalia Perkins

Professor, School of Physics and Astronomy### Contact

John T. Tate HallRoom 130-19

116 Church Street Se

Minneapolis, MN 55455

#### Education

Ph.D., Moscow State University, 1997

M.S., Moscow State University, 1994

#### Scientific & Professional Societies

- Fellow, American Physical Society

My research is in the field of theoretical condensed matter physics. My goal is to understand properties of materials from fundamental microscopic basis. I am particularly interested in all kinds of phenomena observed in magnetic materials. In my work, I focus on developing and analyzing microscopic models of electronic systems with strong interplay between charge, spin, and orbital degrees of freedom, and geometric frustration. In particular, I am interested in understanding various unconventional quantum phases in correlated materials, e.g. quantum spin liquids. This is an exciting area of condensed matter physics with rapidly evolving fundamental concepts, discoveries of materials with intriguingly novel behaviors and high promise for useful applications.

Current Funding:

U.S. Department of Energy, Award No. DE-SC0018056

National Science Foundation, Award No. DMR-1929311

#### Honors and Awards

Fellow, American Physical Society, 2016

#### Selected Publications

Yang Yang, Mengqun Li, Ioannis Rousochatzakis, and Natalia B. Perkins, Non-Loudon-Fleury Raman scattering in spin-orbit coupled Mott insulators, Phys. Rev. B 104, 144412 (2021)

Kexin Feng, Mengxing Ye and Natalia B. Perkins, Temperature evolution of the phonon dynamics in the Kitaev spin liquid, Phys. Rev. B 103, 214416 (2021)

Alejandro Ruiz, Nicholas P. Breznay, Mengqun Li, Ioannis Rousochatzakis, Anthony Allen, Isaac Zinda, Vikram Nagarajan, Gilbert Lopez, Mary H. Upton, Jungho Kim, Ayman H. Said, Xian-Rong Huang, Thomas Gog, Diego Casa, Robert J. Birgeneau, Jake D. Koralek, James G. Analytis, Natalia B. Perkins, Alex Frano, Magnon-spinon dichotomy in the Kitaev hyperhoneycomb β-Li2IrO3, Phys. Rev. B 103, 181404 (2021)

Wen-Han Kao and Natalia B. Perkins, Disorder upon disorder: localization effects in the Kitaev spin liquid, *Annals of Physics *168506 (2021)

Wen-Han Kao, Johannes Knolle, Gábor B. Halász, Roderich Moessner, and Natalia B. Perkins, Vacancy-Induced Low-Energy Density of States in the Kitaev Spin Liquid**, **Phys. Rev. X 11, 011034 (2021)

Kexin Feng, Natalia B. Perkins, and F. J. Burnell, Further insights into the thermodynamics of the Kitaev honeycomb model, Phys. Rev. B 102, 224402 (2020)

Mengxing Ye, Rafael M. Fernandes, Natalia B. Perkins, Phonon dynamics in the Kitaev spin liquid, Phys. Rev. Research 2, 033180 (2020)

Mengqun Li, Ioannis Rousochatzakis, Natalia B. Perkins, Reentrant incommensurate order and anomalous magnetic torque in the Kitaev magnet β-Li2IrO3, Phys. Rev. Research 2, 033328 (2020)

Yang Yang, Natalia B. Perkins, Fulya Koc, Chi-Huei Lin, Ioannis Rousochatzakis, Quantum-classical crossover in the spin-1/2 Heisenberg-Kitaev kagome magnet, Phys. Rev. Research 2, 033217 (2020)

Mengqun Li, Ioannis Rousochatzakis, Natalia B Perkins, Unconventional magnetic field response of the hyperhoneycomb Kitaev magnet β−Li2IrO3, *Phys. Rev. Research 2, 013065 (2020)*

Mengqun Li, Natalia B. Perkins, and Ioannis Rousochatzakis, Collective spin dynamics of Z2 vortex crystals in triangular Kitaev-Heisenberg antiferromagnets, *Phys. Rev. Research 1, 013002 (2019)*

I. Rousochatzakis, S. Kourtis, J. Knolle, R. Moessner, and N. B. Perkins, Quantum spin liquid at finite temperature: proximate dynamics and persistent typicality, *Phys. Rev. B 100, 045117 (2019)*

Johannes Knolle, Roderich Moessner, and Natalia B. Perkins, Bond-Disordered Spin Liquid and the Honeycomb Iridate H3LiIr2O6: Abundant Low-Energy Density of States from Random Majorana Hopping, *Phys. Rev. Lett. 122, 047202 (2019)*

Ioannis Rousochatzakis and Natalia B. Perkins, Magnetic field induced evolution of intertwined orders in the Kitaev magnet β−Li2IrO3, *Phys. Rev. B 97, 174423 (2018)*

Jianlong Fu, Johannes Knolle, and Natalia B. Perkins, Three types of representation of spin in terms of Majorana fermions and an alternative solution of the Kitaev honeycomb model, *Phys. Rev. B 97, 115142 (2018)*

Ioannis Rousochatzakis and Natalia B. Perkins, Classical Spin Liquid Instability Driven By Off-Diagonal Exchange in Strong Spin-Orbit Magnets, *Phys. Rev. Lett. 118, 147204 (2017)*

Gábor B. Halász, Natalia B. Perkins, and Jeroen van den Brink, Resonant Inelastic X-Ray Scattering Response of the Kitaev Honeycomb Model, *Phys. Rev. Lett. 117, 127203 (2016)*

Ioannis Rousochatzakis, Johannes Reuther, Ronny Thomale, Stephan Rachel, and Natalia B. Perkins, Phase Diagram and Quantum Order by Disorder in the Kitaev K1-K2 Honeycomb Magnet, *PRX 5, 041035 (2015)*

Brent Perreault, Johannes Knolle, Natalia B Perkins, and F. J. Burnell , Theory of Raman response in three-dimensional Kitaev spin liquids: Application to beta- and gamma-Li2IrO3 compounds, *PRB 92, 094439 (2015)*

Yuriy Sizyuk, Craig Price, Peter Woelfle, Natalia B. Perkins, Importance of anisotropic exchange interactions in honeycomb iridates. Minimal model for zigzag antiferromagnetic order in Na2IrO3., *PRB 90, 155126 (2015)*

J. Knolle, Gia-Wei Chern, D. L. Kovrizhin, R. Moessner, N. B. Perkins, Raman Scattering Signatures of Kitaev Spin Liquids in A2IrO3 Iridates, *PRL 113, 187201 (2014)*

Craig Price, Natalia B. Perkins, Critical properties of the Kitaev-Heisenberg model, *PRL 109, 187201 (2012)*

Samuel Ducatman, Natalia B. Perkins, Andrey Chubukov, Magnetism in parent Fe-chalcogenides: quantum fluctuations select a plaquette order, *PRL 109, 157206 (2012)*

## Advisees & Collaborators

##### Graduate students:

- Yang Yang (2017 - current)
- Wen-Han Kao (2019 - current)
- Kexin Feng (2019 - current)
- Susmita Singh (2019 - current)
- Swetlana Swarup (2020-current)

**Post Doctoral Researchers:**

- Peter Panagiotis Stavropoulos (2021-current)

## Former Researchers and Students

##### Postdocs:

- Ioannis Rousochatzakis (2015-2018). Now Assistant Professor at Loughborough University, UK
- Gia-Wei Chern (2009-2012). Now Associate Professor at University of Virginia

##### Graduate students:

- Mengqun Li (2016 - Ph.D. 2020). Now Quantitative Strategist at a high-frequency trading firm Virtu Financial
- Jianlong Fu (2016 - Ph.D. 2019). Now Postdoctoral Fellow Hong Kong University
- Yuriy Sizyuk (2012 - Ph.D. 2017). Postdoctoral Fellow Iowa State University (2017-2019) Now Scientist at Doty Scientific in South Carolina
- Samuel Ducatman (2011 - Ph.D. 2017). Now high school teacher of physics in Minneapolis
- Eunsong Choi, (2009 - Ph.D. 2015). Now Financial Software Developer at Bloomberg LP

##### Master students:

- David Bosch (2017-2018). Now working at IntriCon Corporation
- Fulya Koc (2015-2016). Now Ph.D. student at Izmir Institute of Technology
- Chi-Huei Lin (2017-2018). Now working in semiconductor company TSNC, Taiwan

##### Undergraduate students:

- Jake Novotny (2016-2017). Now working at NVE Corporation specialized on spintronics and nanotechnology
- Craig Price (2010-2012). Ph.D. at Penn State University in 2018. Now Scientist Principal at BAE Systems (London)
- Aysel Shiralieva (2020-2021). Now Master student at École normale supérieure (Paris)