Transient terahertz photoconductivity of insulating cuprates

J. C. Petersen; A. Farahani; D. G. Sahota; Ruixing Liang; J. S. Dodge

doi:10.1103/PhysRevB.96.115133

Transient terahertz photoconductivity of insulating cuprates

Strongly Correlated Electrons 2017-09-21 v3

Authors: J. C. Petersen , A. Farahani , D. G. Sahota , Ruixing Liang , J. S. Dodge

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Abstract

We establish a detailed phenomenology of photocarrier transport in the copper oxide plane by studying the transient terahertz photoconductivity of Sr $_2$ CuO $_2$ Cl $_2$ and YBa $_2$ Cu $_3$ O $_6$ . The peak photoconductivity saturates with fluence, decays on multiple picosecond timescales, and evolves into a state characterized by activated transport. The time dependence shows little change with fluence, indicating that the decay is governed by first-order recombination kinetics. We find that most photocarriers make a negligible contribution to the dc photoconductivity, and we estimate the intrinsic photocarrier mobility to be 0.6-0.7 cm $^2$ /V s at early times, comparable to the mobility in chemically doped materials.

Keywords

transient terahertz photoconductivity insulating cuprates photocarrier transport recombination kinetics carrier mobility copper oxide plane

Cite

@article{arxiv.1610.10091,
  title  = {Transient terahertz photoconductivity of insulating cuprates},
  author = {J. C. Petersen and A. Farahani and D. G. Sahota and Ruixing Liang and J. S. Dodge},
  journal= {arXiv preprint arXiv:1610.10091},
  year   = {2017}
}

Transient terahertz photoconductivity of insulating cuprates

Abstract

Keywords

Cite

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