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Title: Dispersive charge density wave excitations in Bi2Sr2CaCu2O8+δ [Dispersive charge density wave excitations and temperature dependent commensuration in Bi2Sr2CaCu2O8+δ]

Journal Article · · Nature Physics
DOI:https://doi.org/10.1038/nphys4157· OSTI ID:1407695
 [1]; ORCiD logo [2];  [3];  [4];  [1];  [5];  [5];  [6];  [6];  [7];  [7];  [7]; ORCiD logo [8];  [2];  [9];  [9];  [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences
  2. Polytechnic Univ. of Milan (Italy). Dept. of Physics, National Research Council-SPIN Inst. (CNR-SPIN)
  3. Polytechnic Univ. of Milan (Italy). Dept. of Physics
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
  5. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  6. Stanford Univ., CA (United States). Geballe Lab. for Advancved Materials
  7. National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
  8. National Research Council-SPIN Inst. (CNR-SPIN), Napoli (Italy)
  9. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences; Stanford Univ., CA (United States). Geballe Lab. for Advancved Materials

Experimental evidence on high-Tc cuprates reveals ubiquitous charge density wave (CDW) modulations, which coexist with superconductivity. Although the CDW had been predicted by theory, important questions remain about the extent to which the CDW influences lattice and charge degrees of freedom and its characteristics as functions of doping and temperature. These questions are intimately connected to the origin of the CDW and its relation to the mysterious cuprate pseudogap. Here, we use ultrahigh resolution resonant inelastic x-ray scattering (RIXS) to reveal new CDW character in underdoped Bi2Sr2CaCu2O8+{\delta} (Bi2212). At low temperature, we observe dispersive excitations from an incommensurate CDW that induces anomalously enhanced phonon intensity, unseen using other techniques. Near the pseudogap temperature T*, the CDW persists, but the associated excitations significantly weaken and the CDW wavevector shifts, becoming nearly commensurate with a periodicity of four lattice constants. The dispersive CDW excitations, phonon anomaly, and temperature dependent commensuration provide a comprehensive momentum space picture of complex CDW behavior and point to a closer relationship with the pseudogap state.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1407695
Alternate ID(s):
OSTI ID: 1418320
Journal Information:
Nature Physics, Vol. 13, Issue 10; ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 77 works
Citation information provided by
Web of Science

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Cited By (7)

Probing multi-spinon excitations outside of the two-spinon continuum in the antiferromagnetic spin chain cuprate Sr2CuO3 journal December 2018
Theoretical understanding of photon spectroscopies in correlated materials in and out of equilibrium journal August 2018
Origin of high-energy charge excitations observed by resonant inelastic X-ray scattering in cuprate superconductors journal January 2019
Emergent charge order near the doping-induced Mott-insulating quantum phase transition in Sr3Ru2O7 journal March 2019
Mott variable range hopping and bad-metal in lightly doped spin-orbit Mott insulator BaIr O 3 journal June 2018
Uniaxial pressure control of competing orders in a high-temperature superconductor journal November 2018
Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high- T c superconductor journal August 2019

Figures / Tables (9)