Current browse context:
cond-mat.str-el
Change to browse by:
References & Citations
Condensed Matter > Strongly Correlated Electrons
Title: Thermoelectric and thermal properties of the weakly disordered non-Fermi liquid phase of Luttinger semimetals
(Submitted on 15 Apr 2021 (v1), last revised 7 Feb 2022 (this version, v3))
Abstract: We compute the thermoelectric and thermal transport in the weakly disordered non-Fermi liquid phase of the Luttinger semimetals at zero doping, where the decay rate associated with the (strong) Coulomb interactions is much larger than the electron-impurity scattering rate. To this end, we implement the Mori-Zwanzig memory matrix method, that does not rely on the existence of long-lived quasiparticles in the system. We find that the thermal conductivity at zero electric field scales as $\bar{\kappa}\sim T^{-n}$ (with $0\lesssim n\lesssim 1)$ at low temperatures, whereas the thermoelectric coefficient has the temperature dependence given by $\alpha\sim T^{p}$ (with $1/2\lesssim p\lesssim 3/2)$. These unconventional properties turn out to be key signatures of this long sought-after non-Fermi liquid state in the Luttinger semimetals, which is expected to emerge in strongly correlated spin-orbit coupled materials like the pyrochlore iridates. Finally, our results indicate that these materials might be good candidates for achieving high figure of merit for thermoelectric applications.
Submission history
From: Ipsita Mandal [view email][v1] Thu, 15 Apr 2021 13:47:42 GMT (93kb,D)
[v2] Fri, 11 Jun 2021 12:38:34 GMT (92kb,D)
[v3] Mon, 7 Feb 2022 15:21:04 GMT (106kb,D)
Link back to: arXiv, form interface, contact.