Retraction

R.N. Mahato, H. Lülf, M.H. Siekman, S.P. Kersten, P.A. Bobbert, M.P. de Jong, L. De Cola, W.G. van der Wiel

Research output: Contribution to journalLetterAcademicpeer-review

Abstract

Our report “ultrahigh magnetoresistance at room temperature in molecular wires” (1) presents measurements on onedimensional molecular chains confined inside the nanochannels of zeolite L crystals. In these measurements, we observed signals that were interpreted as an exceptionally large (~1000%) response of the conductance through the molecular chains to an external magnetic field of a few millitesla. The explanation of the results was based on a room-temperature Pauli spin blockade effect, intrinsic to the hopping transport through the molecules. The observed magnetic field scale of a few millitesla could be explained by the typical magnitude of the random nuclear magnetic field in the molecular environment. The shape of the conductance versus magnetic field dependence was found to be in close agreement with similar curves observed in bulk organic semiconductors, in which the effect is referred to as “organic magnetoresistance” or “OMAR.” The exceptionally large effect in our case was ascribed to the one-dimensional nature of electron transport along the molecular chains.

In follow-up research by some of the coauthors, suspicion arose with regard to data collected by the first author Rabindra N. Mahato, which led to a thorough investigation by the co-authors. This investigation has revealed inappropriate data handling by Dr. Mahato, such that the experimental results are not accurately represented in the paper. This makes it, in our eyes, impossible to solidly underpin the conclusions made in the report. All co-authors have therefore concluded that the paper should be immediately retracted. Dr. Mahato has agreed to this Retraction.
LanguageEnglish
Pages170-170
Number of pages1
JournalScience
Volume350
Issue number6257
DOIs
StatePublished - 9 Oct 2015

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molecular chains
magnetic fields
organic semiconductors
room temperature
wire
curves
crystals
molecules
electrons

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Mahato, R. N., Lülf, H., Siekman, M. H., Kersten, S. P., Bobbert, P. A., de Jong, M. P., ... van der Wiel, W. G. (2015). Retraction. Science, 350(6257), 170-170. DOI: 10.1126/science.350.6257.170-a
Mahato, R.N. ; Lülf, H. ; Siekman, M.H. ; Kersten, S.P. ; Bobbert, P.A. ; de Jong, M.P. ; De Cola, L. ; van der Wiel, W.G./ Retraction. In: Science. 2015 ; Vol. 350, No. 6257. pp. 170-170
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Mahato, RN, Lülf, H, Siekman, MH, Kersten, SP, Bobbert, PA, de Jong, MP, De Cola, L & van der Wiel, WG 2015, 'Retraction' Science, vol. 350, no. 6257, pp. 170-170. DOI: 10.1126/science.350.6257.170-a

Retraction. / Mahato, R.N.; Lülf, H.; Siekman, M.H.; Kersten, S.P.; Bobbert, P.A.; de Jong, M.P.; De Cola, L.; van der Wiel, W.G.

In: Science, Vol. 350, No. 6257, 09.10.2015, p. 170-170.

Research output: Contribution to journalLetterAcademicpeer-review

TY - JOUR

T1 - Retraction

AU - Mahato,R.N.

AU - Lülf,H.

AU - Siekman,M.H.

AU - Kersten,S.P.

AU - Bobbert,P.A.

AU - de Jong,M.P.

AU - De Cola,L.

AU - van der Wiel,W.G.

PY - 2015/10/9

Y1 - 2015/10/9

N2 - Our report “ultrahigh magnetoresistance at room temperature in molecular wires” (1) presents measurements on onedimensional molecular chains confined inside the nanochannels of zeolite L crystals. In these measurements, we observed signals that were interpreted as an exceptionally large (~1000%) response of the conductance through the molecular chains to an external magnetic field of a few millitesla. The explanation of the results was based on a room-temperature Pauli spin blockade effect, intrinsic to the hopping transport through the molecules. The observed magnetic field scale of a few millitesla could be explained by the typical magnitude of the random nuclear magnetic field in the molecular environment. The shape of the conductance versus magnetic field dependence was found to be in close agreement with similar curves observed in bulk organic semiconductors, in which the effect is referred to as “organic magnetoresistance” or “OMAR.” The exceptionally large effect in our case was ascribed to the one-dimensional nature of electron transport along the molecular chains.In follow-up research by some of the coauthors, suspicion arose with regard to data collected by the first author Rabindra N. Mahato, which led to a thorough investigation by the co-authors. This investigation has revealed inappropriate data handling by Dr. Mahato, such that the experimental results are not accurately represented in the paper. This makes it, in our eyes, impossible to solidly underpin the conclusions made in the report. All co-authors have therefore concluded that the paper should be immediately retracted. Dr. Mahato has agreed to this Retraction.

AB - Our report “ultrahigh magnetoresistance at room temperature in molecular wires” (1) presents measurements on onedimensional molecular chains confined inside the nanochannels of zeolite L crystals. In these measurements, we observed signals that were interpreted as an exceptionally large (~1000%) response of the conductance through the molecular chains to an external magnetic field of a few millitesla. The explanation of the results was based on a room-temperature Pauli spin blockade effect, intrinsic to the hopping transport through the molecules. The observed magnetic field scale of a few millitesla could be explained by the typical magnitude of the random nuclear magnetic field in the molecular environment. The shape of the conductance versus magnetic field dependence was found to be in close agreement with similar curves observed in bulk organic semiconductors, in which the effect is referred to as “organic magnetoresistance” or “OMAR.” The exceptionally large effect in our case was ascribed to the one-dimensional nature of electron transport along the molecular chains.In follow-up research by some of the coauthors, suspicion arose with regard to data collected by the first author Rabindra N. Mahato, which led to a thorough investigation by the co-authors. This investigation has revealed inappropriate data handling by Dr. Mahato, such that the experimental results are not accurately represented in the paper. This makes it, in our eyes, impossible to solidly underpin the conclusions made in the report. All co-authors have therefore concluded that the paper should be immediately retracted. Dr. Mahato has agreed to this Retraction.

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U2 - 10.1126/science.350.6257.170-a

DO - 10.1126/science.350.6257.170-a

M3 - Letter

VL - 350

SP - 170

EP - 170

JO - Science

T2 - Science

JF - Science

SN - 0036-8075

IS - 6257

ER -

Mahato RN, Lülf H, Siekman MH, Kersten SP, Bobbert PA, de Jong MP et al. Retraction. Science. 2015 Oct 9;350(6257):170-170. Available from, DOI: 10.1126/science.350.6257.170-a