Hot Electrons Regain Coherence in Semiconducting Nanowires
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
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2017
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| _version_ | 1866912043931533312 |
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| author | Reiner, Jonathan Nayak, Abhay Kumar Avraham, Nurit Norris, Andrew Yan, Binghai Fulga, Ion Cosma Kang, Jung-Hyun Karzig, Torsten Shtrikman, Hadas Beidenkopf, Haim |
| author_facet | Reiner, Jonathan Nayak, Abhay Kumar Avraham, Nurit Norris, Andrew Yan, Binghai Fulga, Ion Cosma Kang, Jung-Hyun Karzig, Torsten Shtrikman, Hadas Beidenkopf, Haim |
| contents | The higher the energy of a particle is above equilibrium the faster it relaxes due to 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. We show here 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 both 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 non-monotonic 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1704_02580 |
| institution | arXiv |
| publishDate | 2017 |
| record_format | arxiv |
| spellingShingle | Hot Electrons Regain Coherence in Semiconducting Nanowires Reiner, Jonathan Nayak, Abhay Kumar Avraham, Nurit Norris, Andrew Yan, Binghai Fulga, Ion Cosma Kang, Jung-Hyun Karzig, Torsten Shtrikman, Hadas Beidenkopf, Haim Mesoscale and Nanoscale Physics The higher the energy of a particle is above equilibrium the faster it relaxes due to 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. We show here 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 both 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 non-monotonic 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. |
| title | Hot Electrons Regain Coherence in Semiconducting Nanowires |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/1704.02580 |