Nodal Quasiparticles and Antinodal Charge Ordering in Ca2-xNaxCuO2Cl2

K M Shen, F Ronning, D H Lu, Felix Baumberger, N J C Ingle, W S Lee, W Meevasana, Y Kohsaka, M Azuma, M Takano, H Takagi, Z X Shen

Research output: Contribution to journalArticlepeer-review

303 Citations (Scopus)

Abstract

Understanding the role of competing states in the cuprates is essential for developing a theory for high-temperature superconductivity. We report angle-resolved photoemission spectroscopy experiments which probe the 4a(o) x 4a(o) charge-ordered state discovered by scanning tunneling microscopy in the lightly doped cuprate superconductor Ca2-x NaxCuO2Cl2. Our measurements reveal a marked dichotomy between the real- and momentum-space probes, for which charge. ordering is emphasized in the tunneling measurements and photoemission is most sensitive to excitations near the node of the d-wave superconducting gap. These results emphasize the importance of momentum anisotropy in determining the complex electronic properties of the cuprates and places strong constraints on theoretical models of the charge-ordered state.

Original languageEnglish
Pages (from-to)901
Number of pages901
JournalScience
Volume307
DOIs
Publication statusPublished - 11 Feb 2005

Keywords

  • SUPERCONDUCTORS
  • BI2SR2CACU2O8+DELTA
  • CA2CUO2CL2
  • PSEUDOGAP
  • OXIDES
  • STATES
  • MODEL

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