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Giant single-molecule anisotropic magnetoresistance at room temperature.

We report an electrochemically assisted jump-to-contact scanning tunneling microscopy (STM) break junction approach to create reproducible and well-defined single-molecule spintronic junctions. The STM break junction is equipped with an external magnetic field either parallel or perpendicular to the... Full description

Journal Title: Journal of the American Chemical Society May 13, 2015, Vol.137(18), pp.5923-5929
Main Author: Li, Ji-Jun
Other Authors: Bai, Mei-Lin , Chen, Zhao-Bin , Zhou, Xiao-Shun , Shi, Zhan , Zhang, Meng , Ding, Song-Yuan , Hou, Shi-Min , Schwarzacher, Walther , Nichols, Richard J , Mao, Bing-Wei
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1520-5126 ; DOI: 10.1021/ja512483y
Link: http://search.proquest.com/docview/1680958242/?pq-origsite=primo
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title: Giant single-molecule anisotropic magnetoresistance at room temperature.
format: Article
creator:
  • Li, Ji-Jun
  • Bai, Mei-Lin
  • Chen, Zhao-Bin
  • Zhou, Xiao-Shun
  • Shi, Zhan
  • Zhang, Meng
  • Ding, Song-Yuan
  • Hou, Shi-Min
  • Schwarzacher, Walther
  • Nichols, Richard J
  • Mao, Bing-Wei
subjects:
  • Ladungstransport (Elektrische Ladung)
  • Elektron
  • Elektrode
  • Magnetoresistenz
  • Raumtemperatur
  • Terephthalsäure
  • Magnetisches Feld
  • Chemistry
ispartof: Journal of the American Chemical Society, May 13, 2015, Vol.137(18), pp.5923-5929
description: We report an electrochemically assisted jump-to-contact scanning tunneling microscopy (STM) break junction approach to create reproducible and well-defined single-molecule spintronic junctions. The STM break junction is equipped with an external magnetic field either parallel or perpendicular to the electron transport direction. The conductance of Fe-terephthalic acid (TPA)-Fe single-molecule junctions is measured and a giant single-molecule tunneling anisotropic magnetoresistance (T-AMR) up to 53% is observed at room temperature. Theoretical calculations based on first-principles quantum simulations show that the observed AMR of Fe-TPA-Fe junctions originates from electronic coupling at the TPA-Fe interfaces modified by the magnetic orientation of the Fe electrodes with respect to the direction of current flow. The present study highlights new opportunities for obtaining detailed understanding of mechanisms of charge and spin transport in molecular junctions and the role of interfaces in determining the MR of single-molecule junctions.
language: eng
source:
identifier: E-ISSN: 1520-5126 ; DOI: 10.1021/ja512483y
fulltext: fulltext
issn:
  • 15205126
  • 1520-5126
url: Link


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titleGiant single-molecule anisotropic magnetoresistance at room temperature.
creatorLi, Ji-Jun ; Bai, Mei-Lin ; Chen, Zhao-Bin ; Zhou, Xiao-Shun ; Shi, Zhan ; Zhang, Meng ; Ding, Song-Yuan ; Hou, Shi-Min ; Schwarzacher, Walther ; Nichols, Richard J ; Mao, Bing-Wei
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subjectLadungstransport (Elektrische Ladung) ; Elektron ; Elektrode ; Magnetoresistenz ; Raumtemperatur ; Terephthalsäure ; Magnetisches Feld ; Chemistry;
descriptionWe report an electrochemically assisted jump-to-contact scanning tunneling microscopy (STM) break junction approach to create reproducible and well-defined single-molecule spintronic junctions. The STM break junction is equipped with an external magnetic field either parallel or perpendicular to the electron transport direction. The conductance of Fe-terephthalic acid (TPA)-Fe single-molecule junctions is measured and a giant single-molecule tunneling anisotropic magnetoresistance (T-AMR) up to 53% is observed at room temperature. Theoretical calculations based on first-principles quantum simulations show that the observed AMR of Fe-TPA-Fe junctions originates from electronic coupling at the TPA-Fe interfaces modified by the magnetic orientation of the Fe electrodes with respect to the direction of current flow. The present study highlights new opportunities for obtaining detailed understanding of mechanisms of charge and spin transport in molecular junctions and the role of interfaces in determining the MR of single-molecule junctions.
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