Journal
PHYSICAL REVIEW LETTERS
Volume 93, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.93.187002
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Recent scanning tunneling microscopy experiments of Bi2Sr2CaCu2O8+delta have shown evidence of real-space organization of electronic states at low energies in the pseudogap state [M. Vershinin et al., Science, 303, 1995 (2004).]. We argue based on symmetry considerations as well as model calculations that the experimentally observed modulations are due to a density wave of d-wave Cooper pairs without global phase coherence. We show that scanning tunneling microscopy measurements can distinguish a pair density wave from more typical electronic modulations such as those due to charge density wave ordering or scattering from an on site periodic potential.
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