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Sökning: WFRF:(Delacretaz Luca V.)

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1.
  • Delacretaz, Luca V., et al. (författare)
  • Bad metals from fluctuating density waves
  • 2017
  • Ingår i: SciPost Physics. - : Scipost Foundation. - 2542-4653. ; 3:3
  • Tidskriftsartikel (refereegranskat)abstract
    • Bad metals have a large resistivity without being strongly disordered. In many bad metals the Drude peak moves away from zero frequency as the resistivity becomes large at increasing temperatures. We catalogue the position and width of the ` displaced Drude peak' in the observed optical conductivity of several families of bad metals, showing that omega(peak) similar to Delta omega similar to k(B)T /(h) over bar. This is the same quantum critical timescale that underpins the T-linear dc resistivity of many of these materials. We provide a unified theoretical description of the optical and dc transport properties of bad metals in terms of the hydrodynamics of short range quantum critical fluctuations of incommensurate density wave order. Within hydrodynamics, pinned translational order is essential to obtain the nonzero frequency peak.
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2.
  • Delacrétaz, Luca V., et al. (författare)
  • Theory of hydrodynamic transport in fluctuating electronic charge density wave states
  • 2017
  • Ingår i: Physical Review B. - : American Physical Society. - 2469-9950 .- 2469-9969. ; 96:19
  • Tidskriftsartikel (refereegranskat)abstract
    • We describe the collective hydrodynamic motion of an incommensurate charge density wave state in a clean electronic system. Our description simultaneously incorporates the effects of both pinning due to weak disorder and also phase relaxation due to proliferating dislocations. We show that the interplay between these two phenomena has important consequences for charge and momentum transport. For instance, it can lead to metal-insulator transitions. We furthermore identify signatures of fluctuating density waves in frequency and spatially resolved conductivities. Phase disordering is well known to lead to a large viscosity. We derive a precise formula for the phase relaxation rate in terms of the viscosity in the dislocation cores. We thereby determine the viscosity of the superconducting state of BSCCO from the observed melting dynamics of Abrikosov lattices and show that the result is consistent with dissipation into Bogoliubov quasiparticles.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
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refereegranskat (2)
Författare/redaktör
Karlsson, Anna (2)
Goutéraux, Blaise (2)
Delacretaz, Luca V. (2)
Hartnoll, Sean A. (2)
Lärosäte
Kungliga Tekniska Högskolan (2)
Stockholms universitet (2)
Språk
Engelska (2)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (2)
År
2017 (2)

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