Pair density wave in the pseudogap state of high temperature superconductors |
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Authors: | Chen Han-Dong Vafek Oskar Yazdani Ali Zhang Shou-Cheng |
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Institution: | Department of Applied Physics, Stanford University, Stanford, CA 94305, USA. |
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Abstract: | Recent scanning tunneling microscopy experiments of Bi(2)Sr(2)CaCu(2)O(8+delta) have shown evidence of real-space organization of electronic states at low energies in the pseudogap state 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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