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Title: Precise $${dd}$$ excitations and commensurate intersite Coulomb interactions in the dissimilar cuprates YBa2Cu3O7–y and La2–xSrxCuO4

Journal Article · · Physical Review. B
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [4]; ORCiD logo [5];  [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [6]; ORCiD logo [4]
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source; Lund Univ. (Sweden); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); SLAC
  2. New York Univ. (NYU), NY (United States)
  3. National Synchrotron Radiation Research Center, Hsinchu (Taiwan); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. National Yang Ming Chiao Tung University, Hsinchu (Taiwan)
  5. Lund Univ. (Sweden)
  6. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  7. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  8. National Center for Theoretical Sciences, Hsinchu (Taiwan); National Tsing Hua Univ., Hsinchu (Taiwan); Academia Sinica, Taipei (Taiwan)
+ Show Author Affiliations

Using high-resolution extreme ultraviolet resonant inelastic X-ray scattering (EUVRIXS) spectroscopy at Cu M-edge, we observed the doping dependent spectral shifts of inter-orbital ($${dd}$$) excitations of YBa2Cu3O7-y and La2-xSrxCuO4. With increasing hole doping level from undoped to optimally doped superconducting compositions, the leading edge of $${dd}$$ excitations is found to shift towards lower energy loss in a roughly linear trend that is irrespective to the cuprate species. The magnitude of energy shift can be explained by including a 0.15 eV Coulomb attraction between Cu 3d(x2-y2) electrons and the doped holes on the surrounding oxygens in the atomic multiplet calculations. Finally, the consistent energy shift between distinct cuprate families suggests that this inter-site Coulomb interaction energy scale is relatively material-independent, and provides an important reference point for understanding charge density wave phenomena in the cuprate phase diagram.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Sponsoring Organization:
USDOE Office of Science (SC); National Science and Technology Council (NSTC), Taiwan; National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515; AC02-05CH11231
OSTI ID:
2002879
Alternate ID(s):
OSTI ID: 2234151
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 13 Vol. 107; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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