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  Hot Electrons Regain Coherence in Semiconducting Nanowires

Reiner, J., Nayak, A. K., Avraham, N., Norris, A., Yan, B., Fulga, I. C., et al. (2017). Hot Electrons Regain Coherence in Semiconducting Nanowires. Physical Review X, 7(2): 021016, pp. 1-16. doi:10.1103/PhysRevX.7.021016.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-4988-B Version Permalink: http://hdl.handle.net/21.11116/0000-0001-0906-F
Genre: Journal Article

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 Creators:
Reiner, Jonathan1, Author
Nayak, Abhay Kumar1, Author
Avraham, Nurit1, Author
Norris, Andrew1, Author
Yan, Binghai2, Author              
Fulga, Ion Cosma1, Author
Kang, Jung-Hyun1, Author
Karzig, Toesten1, Author
Shtrikman, Hadas1, Author
Beidenkopf, Haim1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863427              

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 Abstract: The higher the energy of a particle is above equilibrium, the faster it relaxes because of the growing phase space of available electronic states it can interact with. In the relaxation process, phase coherence is lost, thus limiting high-energy quantum control and manipulation. In one-dimensional systems, high relaxation rates are expected to destabilize electronic quasiparticles. Here, we show that the decoherence induced by relaxation of hot electrons in one-dimensional semiconducting nanowires evolves non-monotonically with energy such that above a certain threshold hot electrons regain stability with increasing energy. We directly observe this phenomenon by visualizing, for the first time, the interference patterns of the quasi-one-dimensional electrons using scanning tunneling microscopy. We visualize the phase coherence length of the one-dimensional electrons, as well as their phase coherence time, captured by crystallographic Fabry-Perot resonators. A remarkable agreement with a theoretical model reveals that the nonmonotonic behavior is driven by the unique manner in which one-dimensional hot electrons interact with the cold electrons occupying the Fermi sea. This newly discovered relaxation profile suggests a high-energy regime for operating quantum applications that necessitate extended coherence or long thermalization times, and may stabilize electronic quasiparticles in one dimension.

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Language(s): eng - English
 Dates: 2017-05-052017-05-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000400673300002
DOI: 10.1103/PhysRevX.7.021016
 Degree: -

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Title: Physical Review X
  Abbreviation : Phys. Rev. X
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 7 (2) Sequence Number: 021016 Start / End Page: 1 - 16 Identifier: Other: 2160-3308
CoNE: /journals/resource/2160-3308