Conformational Electroresistance and Hysteresis in Nanoclusters

Li, Xiangguo; Zhang, Xiaoguang; Cheng, Hai-Ping

doi:10.1021/nl5014458

Title: Conformational Electroresistance and Hysteresis in Nanoclusters

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Abstract

Among many mechanisms proposed for electroresistance, ones involving structural changes are the least understood because of challenges of controllability and repeatability. Yet structural changes can cause dramatic changes in electronic properties, leading to multiple ways in which conduction paths can be opened and closed, not limited to filament movement or variation in molecular conductance. Here we show at least another way: conformational dependence of the Coulomb charging energy of a nanocluster, where charging induced conformational distortion changes the blockade voltage, which in turn leads to a giant electroresistance. This intricate interplay between charging and conformation change is demonstrated in a nanocluster Zn3O4 by combining a first-principles calculation with a temperature dependent transport model. The predicted hysteretic Coulomb blockade staircase in the current-voltage curve adds another dimension to the rich phenomenon of tunneling electroresistance. The new mechanism also provides a better controlled and repeatable platform to study conformational electroresistance.

Authors:

Li, Xiangguo ^[1]; Zhang, Xiaoguang ^[2]; Cheng, Hai-Ping ^[1]

Univ. of Florida, Gainesville, FL (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Wed Jul 02 00:00:00 EDT 2014

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1185402

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Nano Letters

Additional Journal Information:: Journal Volume: 14; Journal Issue: 8; Journal ID: ISSN 1530-6984

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Li, Xiangguo, Zhang, Xiaoguang, and Cheng, Hai-Ping. Conformational Electroresistance and Hysteresis in Nanoclusters.  United States: N. p., 2014. 
Web.  doi:10.1021/nl5014458.

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                    Li, Xiangguo, Zhang, Xiaoguang, & Cheng, Hai-Ping. Conformational Electroresistance and Hysteresis in Nanoclusters.  United States.  https://doi.org/10.1021/nl5014458

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                    Li, Xiangguo, Zhang, Xiaoguang, and Cheng, Hai-Ping. Wed .  
"Conformational Electroresistance and Hysteresis in Nanoclusters".  United States.  https://doi.org/10.1021/nl5014458.  https://www.osti.gov/servlets/purl/1185402.

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@article{osti_1185402,

  title        = {Conformational Electroresistance and Hysteresis in Nanoclusters},

  author       = {Li, Xiangguo and Zhang, Xiaoguang and Cheng, Hai-Ping},

  abstractNote = {Among many mechanisms proposed for electroresistance, ones involving structural changes are the least understood because of challenges of controllability and repeatability. Yet structural changes can cause dramatic changes in electronic properties, leading to multiple ways in which conduction paths can be opened and closed, not limited to filament movement or variation in molecular conductance. Here we show at least another way: conformational dependence of the Coulomb charging energy of a nanocluster, where charging induced conformational distortion changes the blockade voltage, which in turn leads to a giant electroresistance. This intricate interplay between charging and conformation change is demonstrated in a nanocluster Zn3O4 by combining a first-principles calculation with a temperature dependent transport model. The predicted hysteretic Coulomb blockade staircase in the current-voltage curve adds another dimension to the rich phenomenon of tunneling electroresistance. The new mechanism also provides a better controlled and repeatable platform to study conformational electroresistance.},

  doi          = {10.1021/nl5014458},

  journal      = {Nano Letters},

  number       = 8,

  volume       = 14,

  place        = {United States},

  year         = {Wed Jul 02 00:00:00 EDT 2014},

  month        = {Wed Jul 02 00:00:00 EDT 2014}

}

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