Charge Order Driven by Fermi-Arc Instability in Bi 2 Sr 2− x La x CuO 6+δ

• DOI: 10.1126/science.1242996
• Publication Date: 2013-12-20T06:56:30Z
• Authors: R. Comin; A. Frano; M. M. Yee; Y. Yoshida; H. Eisaki; E. Schierle; E. Weschke; R. Sutarto; F. He; A. Soumyanarayanan; Yang He; M. Le Tacon; I. S. Elfimov; Jennifer E. Hoffman; G. A. Sawatzky; B. Keimer; A. Damascelli
• Keywords: 0301 basic medicine; 03 medical and health sciences; 500; 530

The understanding of the origin superconductivity in cuprates has been hindered by apparent diversity intertwining electronic orders these materials. We combined resonant x-ray scattering (REXS), scanning-tunneling microscopy (STM), and angle-resolved photoemission spectroscopy (ARPES) to observe a charge order that appears consistently surface bulk, momentum real space within one cuprate family, Bi <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msub> <mml:mi mathvariant="normal"> </mml:mi> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> </mml:math> Sr <mml:mo>−</mml:mo> <mml:mi>x</mml:mi> La CuO <mml:mn>6</mml:mn> <mml:mo>+</mml:mo> <mml:mi>δ</mml:mi> . observed wave vectors rule out simple antinodal nesting single-particle limit but match well with phenomenological model many-body instability Fermi arcs. Combined earlier observations other families, findings suggest existence generic charge-ordered state underdoped uncover its intimate connection pseudogap regime.