Particle–Hole Asymmetry and the Pseudogap Phase of the High-TC Superconductors

Yang, H B; Rameau, J D; Johnson, P D; Gu, G D

doi:10.1007/s10948-010-0647-6

Title: Particle–Hole Asymmetry and the Pseudogap Phase of the High-TC Superconductors

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Abstract

In the pseudogap phase of the copper oxide superconductors, a significant portion of the Fermi surface is still gapped at temperatures above the superconducting transition temperature T{sub C}. Instead of a closed Fermi surface, the low-energy electronic excitations appear to form unconnected Fermi arcs separated by gapped regions. It is generally believed that the spectral function is particle-hole symmetric (at low energies) in both regions - with a peak at the Fermi level on the Fermi arcs and a local minimum at the Fermi level in the gapped regions. Here, using high resolution angle-resolved photoemission and new techniques of analysis, we show that on a sizable portion of the Fermi surface, the electronic structure in the immediate vicinity of the Fermi level is not particle-hole symmetric in the pseudogap phase. This is clear evidence that an alternative ground state competes with the superconductivity. The observations are also consistent with the possibility that the Fermi arcs are, in fact, the inner surface of the predicted Fermi pockets.

Authors:: Yang, H B; Rameau, J D; Johnson, P D; Gu, G D

Publication Date:: Thu Jul 01 00:00:00 EDT 2010

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: Doe - Office Of Science

OSTI Identifier:: 984807

Report Number(s):: BNL-93795-2010-JA
Journal ID: ISSN 1557-1939; R&D Project: PO-016; KC0202020; TRN: US1006036

DOE Contract Number:: DE-AC02-98CH10886

Resource Type:: Journal Article

Journal Name:: Journal of Superconductivity and Novel Magnetism

Additional Journal Information:: Journal Volume: 23; Journal Issue: 5; Journal ID: ISSN 1557-1939

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ASYMMETRY; COPPER OXIDES; ELECTRONIC STRUCTURE; FERMI LEVEL; GROUND STATES; PHOTOEMISSION; RESOLUTION; SPECTRAL FUNCTIONS; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TRANSITION TEMPERATURE; High-T C superconductor; Angle-resolved photoemission spectroscopy; Pseudogap phase; Particle–hole asymmetry; Fermi surface

Citation Formats


                    Yang, H B, Rameau, J D, Johnson, P D, and Gu, G D. Particle–Hole Asymmetry and the Pseudogap Phase of the High-TC Superconductors.  United States: N. p., 2010. 
        Web.  doi:10.1007/s10948-010-0647-6.

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                    Yang, H B, Rameau, J D, Johnson, P D, & Gu, G D. Particle–Hole Asymmetry and the Pseudogap Phase of the High-TC Superconductors.  United States.  https://doi.org/10.1007/s10948-010-0647-6

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                    Yang, H B, Rameau, J D, Johnson, P D, and Gu, G D. 2010.  
        "Particle–Hole Asymmetry and the Pseudogap Phase of the High-TC Superconductors".  United States.  https://doi.org/10.1007/s10948-010-0647-6.

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@article{osti_984807,

  title        = {Particle–Hole Asymmetry and the Pseudogap Phase of the High-TC Superconductors},

  author       = {Yang, H B and Rameau, J D and Johnson, P D and Gu, G D},

  abstractNote = {In the pseudogap phase of the copper oxide superconductors, a significant portion of the Fermi surface is still gapped at temperatures above the superconducting transition temperature T{sub C}. Instead of a closed Fermi surface, the low-energy electronic excitations appear to form unconnected Fermi arcs separated by gapped regions. It is generally believed that the spectral function is particle-hole symmetric (at low energies) in both regions - with a peak at the Fermi level on the Fermi arcs and a local minimum at the Fermi level in the gapped regions. Here, using high resolution angle-resolved photoemission and new techniques of analysis, we show that on a sizable portion of the Fermi surface, the electronic structure in the immediate vicinity of the Fermi level is not particle-hole symmetric in the pseudogap phase. This is clear evidence that an alternative ground state competes with the superconductivity. The observations are also consistent with the possibility that the Fermi arcs are, in fact, the inner surface of the predicted Fermi pockets.},

  doi          = {10.1007/s10948-010-0647-6},

  url          = {https://www.osti.gov/biblio/984807},
  journal      = {Journal of Superconductivity and Novel Magnetism},

  issn         = {1557-1939},

  number       = 5,

  volume       = 23,

  place        = {United States},

  year         = {Thu Jul 01 00:00:00 EDT 2010},

  month        = {Thu Jul 01 00:00:00 EDT 2010}

}

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