Phase-coherent transport in trigonal gallium nitride nanowires

Tae Eon Park; Byoung Chul Min; Jaejun Lee; Jeehoon Jeon; Ki Young Lee; Heon Jin Choi; Joonyeon Chang

doi:10.1088/1361-6528/abcfeb

Phase-coherent transport in trigonal gallium nitride nanowires

Tae Eon Park, Byoung Chul Min, Jaejun Lee, Jeehoon Jeon, Ki Young Lee, Heon Jin Choi, Joonyeon Chang

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Gallium nitride nanowires (GaN NWs) with triangular cross-section exhibit universal conductance fluctuations (UCF) originating from the quantum interference of electron wave functions in the NWs. The amplitude of UCF is inversely proportional to the applied bias current. The bias dependence of UCF, combined with temperature dependence of the resistance suggests that phase coherent transport dominates over normal transport in GaN NWs. A unique temperature dependence of phase-coherent length and fluctuation amplitude is associated with inelastic electron-electron scattering in NWs. The phase-coherence length extracted from the UCF is as large as 400 nm at 1.8 K, and gradually decreases as temperature increases up to 60 K.

Original language	English
Article number	125702
Journal	Nanotechnology
Volume	32
Issue number	12
DOIs	https://doi.org/10.1088/1361-6528/abcfeb
Publication status	Published - 2020 Dec 30

Bibliographical note

Funding Information:
This work was supported by the KIST Institutional Program (2E30600), Yonsei-KIST Convergence Research Program and the National Research Council of Science and Technology (NST) (Grant no. CAP-16-01-KIST) by the Korean government (MSIP). H-J C acknowledges the support of Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2018M3D1A1058536).

Publisher Copyright:
© 2020 IOP Publishing Ltd

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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title = "Phase-coherent transport in trigonal gallium nitride nanowires",

abstract = "Gallium nitride nanowires (GaN NWs) with triangular cross-section exhibit universal conductance fluctuations (UCF) originating from the quantum interference of electron wave functions in the NWs. The amplitude of UCF is inversely proportional to the applied bias current. The bias dependence of UCF, combined with temperature dependence of the resistance suggests that phase coherent transport dominates over normal transport in GaN NWs. A unique temperature dependence of phase-coherent length and fluctuation amplitude is associated with inelastic electron-electron scattering in NWs. The phase-coherence length extracted from the UCF is as large as 400 nm at 1.8 K, and gradually decreases as temperature increases up to 60 K.",

author = "Park, {Tae Eon} and Min, {Byoung Chul} and Jaejun Lee and Jeehoon Jeon and Lee, {Ki Young} and Choi, {Heon Jin} and Joonyeon Chang",

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T1 - Phase-coherent transport in trigonal gallium nitride nanowires

AU - Park, Tae Eon

AU - Min, Byoung Chul

AU - Lee, Jaejun

AU - Jeon, Jeehoon

AU - Lee, Ki Young

AU - Choi, Heon Jin

AU - Chang, Joonyeon

N1 - Funding Information: This work was supported by the KIST Institutional Program (2E30600), Yonsei-KIST Convergence Research Program and the National Research Council of Science and Technology (NST) (Grant no. CAP-16-01-KIST) by the Korean government (MSIP). H-J C acknowledges the support of Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2018M3D1A1058536). Publisher Copyright: © 2020 IOP Publishing Ltd

PY - 2020/12/30

Y1 - 2020/12/30

N2 - Gallium nitride nanowires (GaN NWs) with triangular cross-section exhibit universal conductance fluctuations (UCF) originating from the quantum interference of electron wave functions in the NWs. The amplitude of UCF is inversely proportional to the applied bias current. The bias dependence of UCF, combined with temperature dependence of the resistance suggests that phase coherent transport dominates over normal transport in GaN NWs. A unique temperature dependence of phase-coherent length and fluctuation amplitude is associated with inelastic electron-electron scattering in NWs. The phase-coherence length extracted from the UCF is as large as 400 nm at 1.8 K, and gradually decreases as temperature increases up to 60 K.

AB - Gallium nitride nanowires (GaN NWs) with triangular cross-section exhibit universal conductance fluctuations (UCF) originating from the quantum interference of electron wave functions in the NWs. The amplitude of UCF is inversely proportional to the applied bias current. The bias dependence of UCF, combined with temperature dependence of the resistance suggests that phase coherent transport dominates over normal transport in GaN NWs. A unique temperature dependence of phase-coherent length and fluctuation amplitude is associated with inelastic electron-electron scattering in NWs. The phase-coherence length extracted from the UCF is as large as 400 nm at 1.8 K, and gradually decreases as temperature increases up to 60 K.

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JO - Nanotechnology

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Phase-coherent transport in trigonal gallium nitride nanowires

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Bibliographical note

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