Charge 2e Boson Underlies Two - Fluid Model of the Pseudogap in Cuprate Superconductors

Abstract

Starting from the effective low energy theory of a doped Mott insulator, we show that the effective carrier density in the underdoped regime agrees with a two - fluid description. Namely, it has distinct temperature independent and thermally activated components. We identify the thermally activated component as the bound state of a hole and a charge 2e boson, which occurs naturally in the effective theory. The thermally activated unbinding of this state leads to the strange metal and subsequent $T-$linear resistivity. We find that the doping dependence of the binding energy is in excellent agreement with the experimentally determined pseudogap energy scale in cuprate superconductors.

4 pages: 4 typos are corrected and a sentence has been added to the abstract. Additional typos are removed from Eqs. (6)-(8)

References in corpus (6)

• Strong charge fluctuations manifested in the high-temperature Hall coefficient of high-T_c cuprates
• Mottness in High-Temperature Copper-Oxide Superconductors
• Hidden Charge 2e Boson in Doped Mott Insulators: Field Theory of Mottness
• Universal Behavior and the Two-component Character of Magnetically Underdoped Cuprate Superconductors
• Exact Integration of the High Energy Scale in Doped Mott Insulators
• Hidden Charge 2e Boson: Experimental Consequences for Doped Mott Insulators

Cited by in corpus (8)

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• Mottness Collapse and T-linear Resistivity in Cuprate Superconductors
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• Phase transitions to dipolar clusters and charge density waves in high Tc superconductors
• Chern-Simons theory and atypical Hall conductivity in the Varma phase
• Non-conservation of Fermionic Degrees of Freedom at Low-energy in Doped Mott Insulators
• Fractionalize This