Coherence and pairing in a doped Mott insulator: Application to the cuprates

Details Coherence and pairing in a doped Mott insulator: Application to the cuprates Coherence and pairing in a doped Mott insulator: Application to the cuprates

2009-04-08

arxiv.org/abs/0904.1433v1

Physics

Condensed Matter

Strongly Correlated Electrons

4+ pages, 1 figure. Sequel to arXiv:0903.0870

Scientific paper

The issues of single particle coherence and its interplay with singlet pairing are studied within the slave boson gauge theory of a doped Mott insulator. Prior work by one of us (T. Senthil, arXiv:0804.1555) showed that the coherence scale below which Landau quasiparticles emerge is parametrically lower than that identified in the slave boson mean field theory. Here we study the resulting new non-fermi liquid intermediate temperature regime characterized by a single particle scattering rate that is linear in temperature ($T$). In the presence of a d-wave pair amplitude this leads to a pseudogap state with $T$ dependent Fermi arcs near the nodal direction. Implications for understanding the cuprates are discussed.

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