Evidence for Charge-Density-Wave in Underdoped Bi2201 from ARPES and LEED

ORAL

Abstract

While there is mounting evidence for a broken symmetry in the pseudogap state of the high-$T_c$ cuprates, the identification of a specific phase remains elusive. Through the combination of electronic (ARPES) and structural (LEED) probes, we uncover a temperature dependent evolution of the CuO$_2$ plane band dispersion in highly-ordered Bi2201, which is directly associated with a hitherto-undetected evolution of the incommensurate superstructure. The quasilinear, continuous variation of the modulation wavelength $2\pi/Q_2$ from $\sim\!66$ to $43$\AA, below a characteristic $T_{Q_2}\!\simeq\!130$\,K, provides evidence for an electronically-driven charge-density-wave ordering. This points to a remarkable electron-lattice coupling, in which the footprint of the BiO-layer-induced superstructure is found in the modulated electronic structure of the CuO$_2$ plane.

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Authors

  • J.A. Rosen

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • R. Comin

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • G. Levy

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • D. Fournier

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • Z.-H. Zhu

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • B. Ludbrook

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • C.N. Veenstra

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • D. Wong

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • P. Dosanjh

    • Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z1, Canada

  • Y. Yoshida

    • Superconducting Electronics Group, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8568, Japan

  • H. Eisaki

    • Superconducting Electronics Group, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8568, Japan

  • L. Petaccia

    • Sincrotrone Trieste, Strada Statale 14 Km 163.5, 34149 Trieste, Italy

  • A. Damascelli

    • Quantum Matter Institute and Department of Physics \& Astronomy, University of British Columbia, Vancouver, British Columbia V6T\,1Z4, Canada