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원자제어 저차원 전자계 연구단
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Impurity-Mediated Early Condensation of a Charge Density Wave in an Atomic Wire Array

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Title
Impurity-Mediated Early Condensation of a Charge Density Wave in an Atomic Wire Array
Author(s)
Han Woong Yeom; Deok Mahn Oh; Stefan Wippermann; Wolf Gero Schmidt
Publication Date
2016-01
Journal
ACS NANO, v.10, no.1, pp.810 - 814
Publisher
AMER CHEMICAL SOC
Abstract
We directly show how impurity atoms induce the condensation of a representative electronic phase, the charge density wave (CDW) phase, in atomic scale with scanning tunneling microscopy. Oxygen impurity atoms on the self-assembled metallic atomic wire array on a silicon crystal condense the CDW locally above the pristine transition temperature. More interestingly, the CDW along the wires is induced not by a single atomic impurity but by the cooperation of multiple impurities. Firstprinciples calculations disclose the mechanism of the cooperation as the coherent superposition of the local lattice strain induced by impurities, stressing the coupled electronic and lattice degrees of freedom for the CDW. This opens the possibility of the strain engineering over electronic phases of atomic-scale systems. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2473
ISSN
1936-0851
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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2016_ACSNANO_단장(저자,교신), 오덕만(공동)_Impurity-Mediated Early Condensation of a Charge Density Wave in an Atomic Wire Array.pdfDownload

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