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Nonequilibrium probe of paired electron pockets in the underdoped cuprates.

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Title: Nonequilibrium probe of paired electron pockets in the underdoped cuprates.
Authors: Boyd, G.R.1 grb35@georgetown.edu, Takei, S.1, Galitski, V.1,2
Source: Solid State Communications. Jul2014, Vol. 189, p63-67. 5p.
Subjects: Electron pairs, Doping agents (Chemistry), Cuprates, Fermi surfaces, Molecular probes, Photoelectron spectroscopy
Abstract: Abstract: We propose an experimental method that can be used generally to test whether the cuprate pseudogap involves precursor pairing that acts to gap out the Fermi surface. The proposal involves angular-resolved photoemission spectroscopy (ARPES) performed in the presence of a transport current driven through the sample. We illustrate this proposal with a specific model of the pseudogap that contains a phase-incoherent paired electron and unpaired hole Fermi surfaces. We show that even a weak current tilts the paired band and modifies the pairing gap in a characteristic way directly measurable by ARPES. Stronger currents can also reveal the Fermi surface through direct suppression of pairing. The proposed experiment is sufficiently general such that it can be used to reveal putative Fermi surfaces that have been reconstructed from other types of periodic order and are gapped out due to pairing. The observation of the predicted phenomena should help resolve the central question about the existence of pairs in the enigmatic pseudogap regime. [Copyright &y& Elsevier]
Copyright of Solid State Communications is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
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Header DbId: egs
DbLabel: Engineering Source
An: 96188190
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: Nonequilibrium probe of paired electron pockets in the underdoped cuprates.
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  Data: <searchLink fieldCode="AR" term="%22Boyd%2C+G%2ER%2E%22">Boyd, G.R.</searchLink><relatesTo>1</relatesTo><i> grb35@georgetown.edu</i><br /><searchLink fieldCode="AR" term="%22Takei%2C+S%2E%22">Takei, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Galitski%2C+V%2E%22">Galitski, V.</searchLink><relatesTo>1,2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Solid+State+Communications%22">Solid State Communications</searchLink>. Jul2014, Vol. 189, p63-67. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Electron+pairs%22">Electron pairs</searchLink><br /><searchLink fieldCode="DE" term="%22Doping+agents+%28Chemistry%29%22">Doping agents (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Cuprates%22">Cuprates</searchLink><br /><searchLink fieldCode="DE" term="%22Fermi+surfaces%22">Fermi surfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+probes%22">Molecular probes</searchLink><br /><searchLink fieldCode="DE" term="%22Photoelectron+spectroscopy%22">Photoelectron spectroscopy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: We propose an experimental method that can be used generally to test whether the cuprate pseudogap involves precursor pairing that acts to gap out the Fermi surface. The proposal involves angular-resolved photoemission spectroscopy (ARPES) performed in the presence of a transport current driven through the sample. We illustrate this proposal with a specific model of the pseudogap that contains a phase-incoherent paired electron and unpaired hole Fermi surfaces. We show that even a weak current tilts the paired band and modifies the pairing gap in a characteristic way directly measurable by ARPES. Stronger currents can also reveal the Fermi surface through direct suppression of pairing. The proposed experiment is sufficiently general such that it can be used to reveal putative Fermi surfaces that have been reconstructed from other types of periodic order and are gapped out due to pairing. The observation of the predicted phenomena should help resolve the central question about the existence of pairs in the enigmatic pseudogap regime. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Solid State Communications is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ssc.2014.03.015
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 5
        StartPage: 63
    Subjects:
      – SubjectFull: Electron pairs
        Type: general
      – SubjectFull: Doping agents (Chemistry)
        Type: general
      – SubjectFull: Cuprates
        Type: general
      – SubjectFull: Fermi surfaces
        Type: general
      – SubjectFull: Molecular probes
        Type: general
      – SubjectFull: Photoelectron spectroscopy
        Type: general
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      – TitleFull: Nonequilibrium probe of paired electron pockets in the underdoped cuprates.
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              Text: Jul2014
              Type: published
              Y: 2014
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