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Modeling the pseudogap metallic state in cuprates: quantum disordered pair density wave

Author(s)
Dai, Zhehao; Senthil, T.; Lee, Patrick A.
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Abstract
We present a way to quantum-disorder a pair density wave and propose it to be a candidate of the effective low-energy description of the pseudogap metal which may reveal itself in a sufficiently high magnetic field that suppresses the d-wave pairing. The ground state we construct is a small-pocket Fermi liquid with a bosonic Mott insulator in the density-wave-enlarged unit cell. At low energy, the charge density is mainly carried by charge 2e bosons, which develop a small insulating gap. As an intermediate step, we discuss the quantum disordering of a fully gapped superconductor and its excitation spectrum. A simplified 1D model, which we solve numerically, is used to illustrate the introduced concepts. We discuss a number of experimental consequences. The interplay between the electron and the small-gap boson results in a step-function background in the electron spectral function which may be consistent with existing angle-resolved photoemission spectroscopy data. Optical excitation across the boson gap can explain the onset and the magnitude of the mid infrared absorption reported long ago.
Date issued
2020-02-03
URI
https://hdl.handle.net/1721.1/125716
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review B
Publisher
American Physical Society
Citation
Dai, Zhehao, T. Senthil, and Patrick A. Lee, "Modeling the pseudogap metallic state in cuprates: quantum disordered pair density wave." Physical Review B 101 (Feb. 2020): no. 064502 doi 10.1103/PhysRevB.101.064502 ©2020 Author(s)
Version: Final published version
ISSN
2469-9950
2469-9969

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