Predicting Electron Hydrodynamics and Signatures of Unconventional Transport in Topological Materials

Seminar
QUEST Center event
No
Speaker
Prineha Narang (UCLA)
Date
30/03/2023 - 13:00 - 12:00Add to Calendar 2023-03-30 12:00:00 2023-03-30 13:00:00 Predicting Electron Hydrodynamics and Signatures of Unconventional Transport in Topological Materials The re-invigorated field of electron hydrodynamics in quantum matter has recently garnered considerable scientific interest, both due to its technological promise of designing near dissipation-less nanoelectronics, as well as its fundamental importance as an experimental probe of strong electron-electron interactions. Investigating the capacity to which observations of electron hydrodynamic flows can inform the nature of electron-electron interactions is particularly important and timely with the advent of spatially-resolved transport measurements which, having demonstrated the hallmark spatial signature of electron hydrodynamic channel flow, must now turn their attention to studying more spatially-complex geometries, enabling the observation of intricate fluid phenomena such as vortices. Recently we have explored the effects of crystal symmetry on electron fluid behaviors starting from the most general viscosity tensors in two and three dimensions, constrained only by crystal symmetry and thermodynamics. In our work we demonstrate the anomalous landscape for electron hydrodynamics in systems beyond graphene, highlighting that previously-thought exotic fluid phenomena can exist in both two-dimensional and anisotropic three-dimensional materials with or without breaking time-reversal symmetry. In this context, the first part of my talk will discuss our recent predictions of hydrodynamics beyond graphene, especially the role of phonons in hydrodynamics in Weyl semimetals. We identify phonon-mediated electron-electron interactions, computed with techniques developed in the group that I will discuss in this talk, as critical in a microscopic understanding of hydrodynamics. The second part of my talk will introduce a new theoretical and computational transport framework from our group, the SpaRTaNS (Spatially Resolved Transport of Nonequilibrium Species) framework. I will discuss applications of this method in nonequilibrium electron and phonon transport in quantum matter. Time permitting, building on our recent work in magnetic Weyl semimetals, I will discuss possible approaches to understand and realize axion physics in condensed-matter systems.   References and links: SpaRTaNS: Link to Github https://narang-lab.github.io/spartans/ 1. Varnavides, G., Jermyn, A. S., Anikeeva, P., Felser, C. & Narang, P. Electron hydrodynamics in anisotropic materials. Nat. Commun. 11, 1–6 (2020). 2. Vool, U. et al. Imaging phonon-mediated hydrodynamic flow in WTe2. Nat. Phys. 17, 1216–1220 (2021). 3. Varnavides, G., Jermyn, A. S., Anikeeva, P. & Narang, P. Probing carrier interactions using electron hydrodynamics. arXiv [cond-mat.mtrl-sci] (2022). 4. Varnavides, G., Wang, Y., Moll, P. J. W., Anikeeva, P. & Narang, P. Finite-size effects of electron transport in PdCoO2. Phys. Rev. Mater. (2021) doi:10.1103/physrevmaterials.6.045002. 5. Wang, Y. & Narang, P. Anisotropic scattering in the goniopolar metal NaSn2As2. Phys. Rev. B Condens. Matter 102, (2020). 6. Osterhoudt, G. B. et al. Evidence for Dominant Phonon-Electron Scattering in Weyl Semimetal WP2. Physical Review X vol. 11 Preprint at https://doi.org/10.1103/physrevx.11.011017 (2021). 7. Coulter, J. et al. Uncovering electron-phonon scattering and phonon dynamics in type-I Weyl semimetals. Phys. Rev. B Condens. Matter 100, 220301 (2019). 8. Garcia, C. A. C., Nenno, D. M., Varnavides, G. & Narang, P. Anisotropic phonon-mediated electronic transport in chiral Weyl semimetals. Phys. Rev. Materials 5, L091202 (2021). 9. van Delft, M. R. et al. Sondheimer oscillations as a probe of non-ohmic flow in WP2 crystals. Nat. Commun. 12, 4799 (2021). 10. Coulter, J., Sundararaman, R. & Narang, P. Microscopic origins of hydrodynamic transport in the type-II Weyl semimetal WP2. Phys. Rev. B Condens. Matter 98, (2018). 11. Varnavides, G., Jermyn, A. S., Anikeeva, P. & Narang, P. Nonequilibrium phonon transport across nanoscale interfaces. Phys. Rev. B Condens. Matter 100, 115402 (2019). 12. Zhao, B., Guo, C., Garcia, C. A. C., Narang, P. & Fan, S. Axion-Field-Enabled Nonreciprocal Thermal Radiation in Weyl Semimetals. Nano Lett. 20, 1923–1927 (2020). 13. Nenno, D. M., Garcia, C. A. C., Gooth, J., Felser, C. & Narang, P. Axion physics in condensed-matter systems. Nature Reviews Physics 2, 682–696 (2020). 14. Mu, Q.-G. et al. Suppression of axionic charge density wave and onset of superconductivity in the chiral Weyl semimetal Ta2Se8I. Phys. Rev. Mater. 5, (2021). Physics (#202), room 301 המחלקה לפיזיקה physics.dept@mail.biu.ac.il Asia/Jerusalem public
Place
Physics (#202), room 301
Abstract

The re-invigorated field of electron hydrodynamics in quantum matter has recently garnered considerable scientific interest, both due to its technological promise of designing near dissipation-less nanoelectronics, as well as its fundamental importance as an experimental probe of strong electron-electron interactions. Investigating the capacity to which observations of electron hydrodynamic flows can inform the nature of electron-electron interactions is particularly important and timely with the advent of spatially-resolved transport measurements which, having demonstrated the hallmark spatial signature of electron hydrodynamic channel flow, must now turn their attention to studying more spatially-complex geometries, enabling the observation of intricate fluid phenomena such as vortices. Recently we have explored the effects of crystal symmetry on electron fluid behaviors starting from the most general viscosity tensors in two and three dimensions, constrained only by crystal symmetry and thermodynamics. In our work we demonstrate the anomalous landscape for electron hydrodynamics in systems beyond graphene, highlighting that previously-thought exotic fluid phenomena can exist in both two-dimensional and anisotropic three-dimensional materials with or without breaking time-reversal symmetry. In this context, the first part of my talk will discuss our recent predictions of hydrodynamics beyond graphene, especially the role of phonons in hydrodynamics in Weyl semimetals. We identify phonon-mediated electron-electron interactions, computed with techniques developed in the group that I will discuss in this talk, as critical in a microscopic understanding of hydrodynamics. The second part of my talk will introduce a new theoretical and computational transport framework from our group, the SpaRTaNS (Spatially Resolved Transport of Nonequilibrium Species) framework. I will discuss applications of this method in nonequilibrium electron and phonon transport in quantum matter. Time permitting, building on our recent work in magnetic Weyl semimetals, I will discuss possible approaches to understand and realize axion physics in condensed-matter systems.

 

References and links:

SpaRTaNS: Link to Github https://narang-lab.github.io/spartans/

1. Varnavides, G., Jermyn, A. S., Anikeeva, P., Felser, C. & Narang, P. Electron hydrodynamics in anisotropic materials. Nat. Commun. 11, 1–6 (2020).

2. Vool, U. et al. Imaging phonon-mediated hydrodynamic flow in WTe2. Nat. Phys. 17, 1216–1220 (2021).

3. Varnavides, G., Jermyn, A. S., Anikeeva, P. & Narang, P. Probing carrier interactions using electron hydrodynamics. arXiv [cond-mat.mtrl-sci] (2022).

4. Varnavides, G., Wang, Y., Moll, P. J. W., Anikeeva, P. & Narang, P. Finite-size effects of electron transport in PdCoO2. Phys. Rev. Mater. (2021) doi:10.1103/physrevmaterials.6.045002.

5. Wang, Y. & Narang, P. Anisotropic scattering in the goniopolar metal NaSn2As2. Phys. Rev. B Condens. Matter 102, (2020).

6. Osterhoudt, G. B. et al. Evidence for Dominant Phonon-Electron Scattering in Weyl Semimetal WP2. Physical Review X vol. 11 Preprint at https://doi.org/10.1103/physrevx.11.011017 (2021).

7. Coulter, J. et al. Uncovering electron-phonon scattering and phonon dynamics in type-I Weyl semimetals. Phys. Rev. B Condens. Matter 100, 220301 (2019).

8. Garcia, C. A. C., Nenno, D. M., Varnavides, G. & Narang, P. Anisotropic phonon-mediated electronic transport in chiral Weyl semimetals. Phys. Rev. Materials 5, L091202 (2021).

9. van Delft, M. R. et al. Sondheimer oscillations as a probe of non-ohmic flow in WP2 crystals. Nat. Commun. 12, 4799 (2021).

10. Coulter, J., Sundararaman, R. & Narang, P. Microscopic origins of hydrodynamic transport in the type-II Weyl semimetal WP2. Phys. Rev. B Condens. Matter 98, (2018).

11. Varnavides, G., Jermyn, A. S., Anikeeva, P. & Narang, P. Nonequilibrium phonon transport across nanoscale interfaces. Phys. Rev. B Condens. Matter 100, 115402 (2019).

12. Zhao, B., Guo, C., Garcia, C. A. C., Narang, P. & Fan, S. Axion-Field-Enabled Nonreciprocal Thermal Radiation in Weyl Semimetals. Nano Lett. 20, 1923–1927 (2020).

13. Nenno, D. M., Garcia, C. A. C., Gooth, J., Felser, C. & Narang, P. Axion physics in condensed-matter systems. Nature Reviews Physics 2, 682–696 (2020).

14. Mu, Q.-G. et al. Suppression of axionic charge density wave and onset of superconductivity in the chiral Weyl semimetal Ta2Se8I. Phys. Rev. Mater. 5, (2021).

תאריך עדכון אחרון : 19/03/2023