Quantized Acoustoelectric Floquet Effect in Quantum Nanowires
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1.
California Institute of Technology
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2.
University of Cambridge
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3.
Bar-Ilan University
Abstract
External coherent fields can drive quantum materials into nonequilibrium states, revealing exotic properties that are unattainable under equilibrium conditions—an approach known as “Floquet engineering.” While optical lasers have commonly been used as the driving fields, recent advancements have introduced nontraditional sources, such as coherent phonon drives. Building on this progress, we demonstrate that driving a metallic quantum nanowire with a coherent wave of terahertz phonons can induce an electronic steady state characterized by a persistent quantized current along the wire. The quantization of the current is achieved due to the coupling of electrons to the nanowire’s vibrational modes, providing the low-temperature heat bath and energy relaxation mechanisms. Our findings underscore the potential of using nonoptical drives, such as coherent phonon sources, to induce nonequilibrium phenomena in materials. Furthermore, our approach suggests a new method for the high-precision detection of coherent phonon oscillations via transport measurements.
Copyright and License
© 2024 American Physical Society.
Acknowledgement
We thank Yang Peng, Michael Kolodrubetz, and Erez Berg for valuable discussions. C. Y. gratefully acknowledges support from the DOE NNSA Stewardship Science Graduate Fellowship program, which is provided under cooperative agreement No. DE-NA0003960. W. H. gratefully acknowledges support from the Caltech Cambridge Scholars Exchange Program. G. R. and I. E. are grateful for support from the Simons Foundation and the Institute of Quantum Information and Matter, as well as support from the NSF DMR Grant No. 1839271. This work is supported by ARO MURI Grant No. W911NF-16-1-0361, and was performed in part at Aspen Center for Physics, which is supported by National Science Foundation Grant No. PHY-1607611.
Funding
C. Y. gratefully acknowledges support from the DOE NNSA Stewardship Science Graduate Fellowship program, which is provided under cooperative agreement No. DE-NA0003960. W. H. gratefully acknowledges support from the Caltech Cambridge Scholars Exchange Program. G. R. and I. E. are grateful for support from the Simons Foundation and the Institute of Quantum Information and Matter, as well as support from the NSF DMR Grant No. 1839271. This work is supported by ARO MURI Grant No. W911NF-16-1-0361, and was performed in part at Aspen Center for Physics, which is supported by National Science Foundation Grant No. PHY-1607611.
Supplemental Material
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PhysRevLett.133.226301.pdf
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Additional details
Related works
- Is new version of
- Discussion Paper: arXiv:2404.11647 (arXiv)
- Is supplemented by
- Supplemental Material: https://journals.aps.org/prl/supplemental/10.1103/PhysRevLett.133.226301/supplement.pdf (URL)
Funding
- United States Department of Energy
- DE-NA0003960
- Caltech Cambridge Scholars Exchange Program
- Simons Foundation
- National Science Foundation
- DMR-1839271
- United States Army Research Office
- W911NF-16-1-0361
- National Science Foundation
- PHY-1607611
Dates
- Accepted
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2024-10-28Accepted