Doping evolution of the electronic specific heat coefficient in slightly-doped La2-xSrxCuO4 single crystals

Abstract

Detailed doping dependence of the electronic specific heat coefficient gamma is studied for La2-xSrxCuO4 (LSCO) single crystals in the slightly-doped regime. We find that gamma systematically increases with doping, and furthermore, even for the samples in the antiferromagnetic (AF) regime, gamma already acquires finite value and grows with x. This suggests that finite electronic density of states (DOS) is created in the AF regime where the transport shows strong localization at low temperatures, and this means the system is not a real insulator with a clear gap even though it still keeps long range AF order.

4 pages, 4 figures, accepted for publication in Journal of Physics: Conference Series (LT25 proceeding)

References in corpus (12)

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• c-Axis Transport and Resistivity Anisotropy of Lightly- to Moderately-Doped La_{2-x}Sr_{x}CuO_{4} Single Crystals: Implications on the Charge Transport Mechanism
• Anisotropic Magnetoresistance in Lightly Doped La_{2-x}Sr_{x}CuO_{4}: Impact of Anti-Phase Domain Boundaries on the Electron Transport
• Low-temperature electronic heat transport in La_{2-x}Sr_{x}CuO_{4} single crystals: Unusual low-energy physics in the normal and superconducting states
• Fully Gapped Single-Particle Excitations in the Lightly Doped Cuprates
• Doped Mott insulators are insulators: hole localization in the cuprates
• Electron Localization in La_{2-x}Sr_xCuO_4 and the Role of Stripes

Cited by in corpus (7)

• The remarkable underlying ground states of cuprate superconductors
• Thermodynamic signatures of quantum criticality in cuprates
• Intermediate Coupling Model of the Cuprates
• Normal state specific heat in the cuprates La${}_{2-x}$Sr${}_x$CuO${}_4$ and Bi${}_{2+y}$Sr${}_{2-x-y}$La${}_x$CuO${}_{6+\delta }$ near the critical point of the pseudogap phase
• Emergence of non-Fermi-liquid behavior due to Fermi surface reconstruction in the underdoped cuprate superconductors
• Large extrinsic phonon thermal Hall effect from resonant scattering
• High density of states in the pseudogap phase of the cuprate superconductor HgBa${}_2$CuO${}_{4+\delta }$