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Large Thermoelectric Effects and Inelastic Scattering in Unconventional Superconductors

Mikael Fogelström (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik) ; Tomas Löfwander (Institutionen för mikroteknologi och nanovetenskap, Bionanosystem ; Extern)
AIP Conference Proceedings Vol. 850 (2006), p. 567.
[Artikel, refereegranskad vetenskaplig]

The thermoelectric coefficient eta(T) in unconventional superconductors is enhanced below Tc by intermediate strength impurity scattering that is intrinsically particle-hole asymmetric. We compute eta(T) for a strong-coupling d-wave superconductor and investigate the effects of inelastic scattering originating from electron-boson interactions. We show that eta(T) is severely suppressed at temperatures just below Tc by a particle-hole symmetric inelastic scattering rate. At lower temperatures inelastic scattering is frozen out and eta(T) recovers and regains its large amplitude. In the limit T->0, we have eta(T) ~ eta_0 T + O[T^3] , where the slope eta_0 contains information about the Drude plasma frequency, the details of impurity scattering, and the change in effective mass by electron-boson interactions. In this limit eta(T) can be used as a probe, complementary to the universal heat and charge conductivities, in investigations of the nature of nodal quasiparticles.



Denna post skapades 2007-01-16. Senast ändrad 2017-01-27.
CPL Pubid: 25641

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Institutionen för mikroteknologi och nanovetenskap, Bionanosystem (2007-2015)

Ämnesområden

Den kondenserade materiens fysik

Chalmers infrastruktur