Strange-metal behavior in correlated molecular conductors
Abstract
The κ-BEDT-TTF salts are prototypical Mott systems, realizing a correlation-driven electronic transition from a Fermi-liquid state to a Mott insulator. The metallic compounds with spatially modulated Hg-containing anions, κ-(BEDT-TTF)4Hg3−δX8 (X = Br, and Cl), however, fall outside this classification. Our temperature-dependent transport and broad-range optical investigations reveal a ρ(T)∝ T dependence of the resistivity up to elevated temperatures and a power-law behavior of the frequency-dependent conductivity |σ̂ (ω)| ∝ ω−0.7; well-known hallmarks of ``strange metals''. The linear-in-frequency scattering rate of these strange metals scales to the Planckian dissipation. We demonstrate that this response only occurs in systems with incommensurate anion layers and establish a direct link to large-scale spatial modulations. Our conclusions can be extended to other strongly correlated strange-metal compounds
Related
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BibTeX
@misc{priya2026strangemetal,
title = {{Strange-metal behavior in correlated molecular conductors}},
author = {Savita Priya and Maxim Wenzel and Christian Prange and Bertold Rasche and Christian Sindlinger and Takuya Kobayashi and Hiromi Taniguchi and Dita Puspita Sari and Yasuyuki Ishii and Kazuya Miyagawa and Kazushi Kanoda and Simone Fratini and Martin Dressel},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.12044},
eprint = {2610.12044},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.12044},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Strange-metal behavior in correlated molecular conductors
AU - Savita Priya
AU - Maxim Wenzel
AU - Christian Prange
AU - Bertold Rasche
AU - Christian Sindlinger
AU - Takuya Kobayashi
AU - Hiromi Taniguchi
AU - Dita Puspita Sari
AU - Yasuyuki Ishii
AU - Kazuya Miyagawa
AU - Kazushi Kanoda
AU - Simone Fratini
AU - Martin Dressel
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2610.12044
UR - https://arxiv.org/abs/2610.12044
AB - The κ-BEDT-TTF salts are prototypical Mott systems, realizing a correlation-driven electronic transition from a Fermi-liquid state to a Mott insulator. The metallic compounds with spatially modulated Hg-containing anions, κ-(BEDT-TTF)_4Hg_3−δX_8 (X = Br, and Cl), however, fall outside this classification. Our temperature-dependent transport and broad-range optical investigations reveal a ρ(T)∝ T dependence of the resistivity up to elevated temperatures and a power-law behavior of the frequency-dependent conductivity |σ̂ (ω)| ∝ ω^−0.7; well-known hallmarks of ``strange metals''. The linear-in-frequency scattering rate of these strange metals scales to the Planckian dissipation. We demonstrate that this response only occurs in systems with incommensurate anion layers and establish a direct link to large-scale spatial modulations. Our conclusions can be extended to other strongly correlated strange-metal compounds
ER -