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Volumn 78, Issue 19, 2008, Pages

Universal nonlinear conductivity close to an itinerant-electron quantum critical point

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EID: 56349170200     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.78.195104     Document Type: Article
Times cited : (18)

References (23)
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  • 12
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    • Nonlinear response near to quantum criticality has also been discussed by 10.1103/PhysRevLett.95.247201
    • Nonlinear response near to quantum criticality has also been discussed by J. Fenton and A. J. Schofield, Phys. Rev. Lett. 10.1103/PhysRevLett.95.247201 95, 247201 (2005), although in their case, the system remains in thermal equilibrium.
    • (2005) Phys. Rev. Lett. , vol.95 , pp. 247201
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  • 13
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  • 15
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    • In a previous work considered by one of us (Ref.), the situation was rather simpler since the thermal conductivity of the model system considered was formally infinite and therefore there was no limit to the rate at which Joule heat could be transported.
    • In a previous work considered by one of us (Ref.), the situation was rather simpler since the thermal conductivity of the model system considered was formally infinite and therefore there was no limit to the rate at which Joule heat could be transported.
  • 16
    • 56349096587 scopus 로고    scopus 로고
    • The relation that the present work bears to Ref. is rather similar to the relation that Ref. bears to Ref..
    • The relation that the present work bears to Ref. is rather similar to the relation that Ref. bears to Ref..
  • 18
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    • The heat sink is strictly necessary to permit the formation of a steady state. It will not appear explicitly in our analysis, which will be essentially linear response for the electrons. The actual answer will turn out to be nonlinear in the electric field because of the field dependence of the paramagnon-electron-scattering rate. For an interesting discussion of the role of the heat sink in conductivity measurements see 10.1103/PhysRevA.19.1721
    • The heat sink is strictly necessary to permit the formation of a steady state. It will not appear explicitly in our analysis, which will be essentially linear response for the electrons. The actual answer will turn out to be nonlinear in the electric field because of the field dependence of the paramagnon-electron-scattering rate. For an interesting discussion of the role of the heat sink in conductivity measurements see A.-M. Tremblay, B. Patton, P. C. Martin, and P. F. Maldague, Phys. Rev. A 10.1103/PhysRevA.19.1721 19, 1721 (1979).
    • (1979) Phys. Rev. a , vol.19 , pp. 1721
    • Tremblay, A.-M.1    Patton, B.2    Martin, P.C.3    Maldague, P.F.4
  • 19
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    • Course of Theoretical Physics Vol. Butterworth-Heinemann, Oxford
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    • (1981) Physical Kinetics , vol.10
    • Lifshitz, E.M.1    Pitaevskii, L.P.2
  • 21
    • 56349150648 scopus 로고    scopus 로고
    • In order to estimate the transport length at 1 K, we have used the Drude formula σ=n e2 τ/m and n= kF3 / (3 π2) to obtain ltr = (ℏσ/ e2) (3 π2 / n2) 1/3. The temperature dependence of the transport length is given by Eq. 17. The Fermi energy of Sr3 Ru2 O7 is εF / kB = (ℏ2 /2 kB m) (3 π2 n) 2/3 ∼7× 103 K.
    • In order to estimate the transport length at 1 K, we have used the Drude formula σ=n e2 τ/m and n= kF3 / (3 π2) to obtain ltr = (ℏσ/ e2) (3 π2 / n2) 1/3. The temperature dependence of the transport length is given by Eq. 17. The Fermi energy of Sr3 Ru2 O7 is εF / kB = (ℏ2 /2 kB m) (3 π2 n) 2/3 ∼7× 103 K.
  • 23
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    • 10.1103/PhysRevLett.82.4280
    • A. Rosch, Phys. Rev. Lett. 10.1103/PhysRevLett.82.4280 82, 4280 (1999).
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    • Rosch, A.1


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