Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session G29: Strongly Correlated Systems, Including Quantum Fluids and Solids V
11:30 AM–2:30 PM,
Tuesday, March 7, 2023
Room: Room 221
Sponsoring
Unit:
DCMP
Chair: Sanu Mishra, Los alamos National Lab
Abstract: G29.00014 : Linear resistivity in κ-(BEDT-TTF)2Cu(NCS)2
2:06 PM–2:18 PM
Presenter:
Chaima Essghaier
(Universite Paris-Saclay)
Authors:
Chaima Essghaier
(Universite Paris-Saclay)
Pascale Auban Senzier
(Universite Paris Saclay - LPS)
Claude Pasquier
(Universite Paris Saclay - LPS)
Our study focuses more specifically on the superconducting phase in two-dimensional molecular materials (κ-(BEDT-TTF)2X family) where we have observed in a wide range of magnetic fields and temperature an unexpected linear in temperature variation of the resistivity for the 2D molecular superconductor κ-(BEDT-TTF)2Cu(NCS)2 .This behavior is retained under pressure (P) and observed only below Tc0(P) where Tc0(P) is the zero magnetic field critical temperature at the pressure P.
Such a linear behavior is the subject of an intense activity in the framework of unconventional superconductivity: it has been observed in cuprates1, quasi-1D molecular conductors of the TMTSF family2 and even in twisted bilayer graphene3. In some of these compounds, this linear behavior of the resistivity ρ(T)=r0+AT has recently been attributed to a so-called Planckian diffusion of the carriers with a universal behavior of the slope A, in contrast to the expected quadratic behavior ρ(T)=r'0+BT2 associated to electron-electron interaction in the Fermi liquid theory.
In this presentation, we will present a careful analysis of the data in the title compound in the framework of this universal Planckian mechanism.
References:
- [1]A. Legros, S. Benhabib, W. Tabis, et al. Universal T-linear resistivity and Planckian dissipation in overdoped cuprates. Nature Phys. 15, 142–147 (2019).
[2]Doiron-Leyraud, N., René de Cotret, S., Sedeki, A. et al. Linear-T scattering and pairing from antiferromagnetic fluctuations in the (TMTSF)2X organic superconductors. Eur. Phys. J. B 78, 23–36 (2010).
[3]Polshyn, H., Yankowitz, M., Chen, S. et al. Large linear-in-temperature resistivity in twisted bilayer graphene. Nat. Phys. 15, 1011–1016 (2019).
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