Dissipative Quantum Criticality as a Source of Strange Metal Behavior
- The strange metal behavior, usually characterized by a linear-in-temperature (T) resistivity, is a still unsolved mystery in solid-state physics. It is often associated with the proximity to a quantum critical point (a second order transition at temperature T=0, leading to a broken symmetry phase) focusing on the related divergent order parameter correlation length. Here, we propose a paradigmatic shift, focusing on a divergent characteristic time scale due to a divergent dissipation acting on the fluctuating critical modes while their correlation length stays finite. To achieve a divergent dissipation, we propose a mechanism based on the coupling between a local order parameter fluctuation and electron density diffusive modes that accounts both for the linear-in-T resistivity and for the logarithmic specific heat versus temperature ratio CV/T∼log(1/T), down to low temperatures.
Author: | Marco GrilliORCiD, Carlo Di Castro, Giovanni Mirarchi, Götz SeiboldORCiD, Sergio CapraraORCiD |
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DOI: | https://doi.org/10.3390/sym15030569 |
ISSN: | 2073-8994 |
Title of the source (English): | Symmetry |
Document Type: | Scientific journal article peer-reviewed |
Language: | English |
Year of publication: | 2023 |
Tag: | charge density fluctuations; cuprates; diffusive modes; strange metal behavior |
Volume/Year: | 15 |
Issue number: | 3 |
Article number: | 569 |
Way of publication: | Open Access |
Faculty/Chair: | Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Computational Physics |