X-ray dichroism and the pseudogap phase of cuprates.
A recent polarized x-ray absorption experiment on the high-temperature cuprate superconductor Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} indicates the presence of broken parity symmetry below the temperature T*, where a pseudogap appears in photoemission. We critically analyze the x-ray data and conclude that a parity-breaking signal of the kind suggested is unlikely based on the crystal structures reported in the literature. Possible other origins of the observed dichroism signal are discussed. We propose x-ray scattering experiments that can be done in order to determine whether such alternative interpretations are valid or not.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 915000
- Report Number(s):
- ANL/MSD/JA-59021
- Journal Information:
- Phys. Rev. B, Journal Name: Phys. Rev. B Journal Issue: 2007 Vol. 76; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- ENGLISH
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