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Growth and characterization of superconducting beta-FeSe type iron chalcogenide nanowires

Chang, H. H.; Chang, C. C.; Chiang, Y. Y.; Luo, J. Y.; Wu, Phillip LU ; Tseng, C. M.; Lee, Y. C.; Wu, Y. R.; Hsieh, Y. T. and Wen, M. H., et al. (2014) In Superconductor Science & Technology 27(2).
Abstract
We have grown highly crystalline beta-FeSe type iron chalcogenide nanowires (NWs) by annealing thin film that is prepared by a pulsed laser deposition method. Three kinds of NWs with compositions of Fe0.8Se, Fe0.88Se0.32Te0.68 and Fe0.88Te0.91S0.09 have been prepared and carefully characterized by a high-resolution transmission electron microscope (HRTEM). The NWs reveal ideal tetragonal structure with crystal growth along the [100] direction. Energy dispersive spectroscopy (EDS) studies and HRTEM images show the NWs to have good compositional uniformity, except for the existence of a thin layer of oxide on the surface. No superconducting transition was observed in the FeSex NWs, which is possibly caused by Fe deficiency. The other two... (More)
We have grown highly crystalline beta-FeSe type iron chalcogenide nanowires (NWs) by annealing thin film that is prepared by a pulsed laser deposition method. Three kinds of NWs with compositions of Fe0.8Se, Fe0.88Se0.32Te0.68 and Fe0.88Te0.91S0.09 have been prepared and carefully characterized by a high-resolution transmission electron microscope (HRTEM). The NWs reveal ideal tetragonal structure with crystal growth along the [100] direction. Energy dispersive spectroscopy (EDS) studies and HRTEM images show the NWs to have good compositional uniformity, except for the existence of a thin layer of oxide on the surface. No superconducting transition was observed in the FeSex NWs, which is possibly caused by Fe deficiency. The other two types of NWs show relatively higher and sharper superconducting transitions than their bulk counterparts. Interestingly, a resistive transition tail is observed in the NWs with diameter smaller than 100 nm, which might originate from a phase slip process in the quasi-one-dimensional system. The success in producing these high quality NWs provides a new avenue for better understanding the origin of superconductivity in beta-FeSe type iron chalcogenides. (Less)
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publication status
published
subject
keywords
nanowires, iron chalcogenide, superconductivity
in
Superconductor Science & Technology
volume
27
issue
2
publisher
IOP Publishing
external identifiers
  • wos:000331146800017
  • scopus:84892713899
ISSN
0953-2048
DOI
10.1088/0953-2048/27/2/025015
language
English
LU publication?
yes
id
a4deb18e-f5c7-463a-bd6e-c2f6f2639085 (old id 4376475)
date added to LUP
2014-04-14 13:12:07
date last changed
2017-01-22 03:58:00
@article{a4deb18e-f5c7-463a-bd6e-c2f6f2639085,
  abstract     = {We have grown highly crystalline beta-FeSe type iron chalcogenide nanowires (NWs) by annealing thin film that is prepared by a pulsed laser deposition method. Three kinds of NWs with compositions of Fe0.8Se, Fe0.88Se0.32Te0.68 and Fe0.88Te0.91S0.09 have been prepared and carefully characterized by a high-resolution transmission electron microscope (HRTEM). The NWs reveal ideal tetragonal structure with crystal growth along the [100] direction. Energy dispersive spectroscopy (EDS) studies and HRTEM images show the NWs to have good compositional uniformity, except for the existence of a thin layer of oxide on the surface. No superconducting transition was observed in the FeSex NWs, which is possibly caused by Fe deficiency. The other two types of NWs show relatively higher and sharper superconducting transitions than their bulk counterparts. Interestingly, a resistive transition tail is observed in the NWs with diameter smaller than 100 nm, which might originate from a phase slip process in the quasi-one-dimensional system. The success in producing these high quality NWs provides a new avenue for better understanding the origin of superconductivity in beta-FeSe type iron chalcogenides.},
  articleno    = {025015},
  author       = {Chang, H. H. and Chang, C. C. and Chiang, Y. Y. and Luo, J. Y. and Wu, Phillip and Tseng, C. M. and Lee, Y. C. and Wu, Y. R. and Hsieh, Y. T. and Wen, M. H. and Wang, M. J. and Wu, M. K.},
  issn         = {0953-2048},
  keyword      = {nanowires,iron chalcogenide,superconductivity},
  language     = {eng},
  number       = {2},
  publisher    = {IOP Publishing},
  series       = {Superconductor Science & Technology},
  title        = {Growth and characterization of superconducting beta-FeSe type iron chalcogenide nanowires},
  url          = {http://dx.doi.org/10.1088/0953-2048/27/2/025015},
  volume       = {27},
  year         = {2014},
}