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Mechanisms of nonthermal destruction of the superconducting state and melting of the charge-density-wave state by femtosecond laser pulses

L. Stojchevska, P. Kusar, T. Mertelj, V. V. Kabanov, Y. Toda, X. Yao, D. Mihailovic

DOI 10.1103/PhysRevB.84.180507 · Physical Review B

T1

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Abstract

The processes leading to nonthermal condensate vaporization and charge-density-wave (CDW) melting with femtosecond laser pulses is systematically investigated in different materials. We find that vaporization is relatively slow (τv∼1 ps) and inefficient in superconductors, exhibiting a strong systematic dependence of the vaporization energy Uv on Tc. In contrast, melting of CDW order proceeds rapidly (τm=50–200 fs) and more efficiently. A quantitative model describing the observed systematic behavior in superconductors is proposed based on a phonon-mediated quasiparticle (QP) bottleneck mechanism. In contrast, Fermi-surface disruption by hot QPs is proposed to be responsible for CDW state melting.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
YBa2Cu3O7-δ

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90Pressure not reportedunknown
YBa2Cu3O7-δ

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63Pressure not reportedunknown
YBa2Cu3O7-δ

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60Pressure not reportedunknown
CaxY1-xBa2Cu3O7-δ

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73Pressure not reportedunknown
Ba(Fe0.93Co0.07)2As2

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—Pressure not reportedunknown
SmFeAsO0.8F0.2

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—Pressure not reportedunknown
NbN

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—Pressure not reportedunknown
La2-xSrxCuO4

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—Pressure not reportedunknown

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