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Optical Conductivity
The pseudogap signature in the optical conductivity of the high-Tc cuprate materials
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We studied the optical conductivity of high-temperature superconducting (HTSC) cuprate materials as a function of temperature and doping within the Rotating Antiferromagnetism Theory (RAFT) using the Marginal Fermi Liquid (MFL) ansatz for self-energy. The doping induces changes in the optical conductivity that can be described by an increasing density of mobile carriers in the underdoped to overdoped regimes. We mainly focused on the pseudogap state which is realized in the underdoped to optimally doped regimes below a characteristic temperature T , a temperature that can appreciably exceed the superconducting transition temperature Tc. We explore the evolution of the pseudogap response by changing the doping level and by varying the temperature from above to below T . Finally, we compared our results with available experimental data and found a good fit with those experimental results.
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