Details

Autor(en) / Beteiligte

• SHEN, Kyle M
• RONNING, F
• TAKAGI, H
• SHEN, Z.-X
• LU, D. H
• BAUMBERGER, F
• INGLE, N. J. C
• LEE, W. S
• MEEVASANA, W
• KOHSAKA, Y
• AZUMA, M
• TAKANO, M

Titel

Nodal quasiparticles and antinodal charge ordering in Ca2-xNaxCuO2Cl2

Ist Teil von

• Science (American Association for the Advancement of Science), 2005-02, Vol.307 (5711), p.901-904

Ort / Verlag

Washington, DC: American Association for the Advancement of Science

Erscheinungsjahr

2005

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• 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 4a0 x 4a0 charge-ordered state discovered by scanning tunneling microscopy in the lightly doped cuprate superconductor Ca2-xNaxCuO2Cl2. 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.