Strange metal behaviour from charge density fluctuations in cuprates
Artikel i vetenskaplig tidskrift, 2021

Besides the mechanism responsible for high critical temperature superconductivity, the grand unresolved issue of the cuprates is the occurrence of a strange metallic state above the so-called pseudogap temperature T-*. Even though such state has been successfully described within a phenomenological scheme, the so-called Marginal Fermi-Liquid theory, a microscopic explanation is still missing. However, recent resonant X-ray scattering experiments identified a new class of charge density fluctuations characterized by low characteristic energies and short correlation lengths, which are related to the well-known charge density waves. These fluctuations are present over a wide region of the temperature-vs-doping phase diagram and extend well above T-*. Here we investigate the consequences of charge density fluctuations on the electron and transport properties and find that they can explain the strange metal phenomenology. Therefore, charge density fluctuations are likely the long-sought microscopic mechanism underlying the peculiarities of the metallic state of cuprates. The strange metallic state of cuprates occurring in a broad region of their phase diagram outside the superconducting and pseudogapped regions remains a mystery. Here the authors consider the charge density fluctuations recently discovered in resonant X-ray experiments as a possible source of scattering and show that these fluctuations can account for the strange metallic behavior.


Goetz Seibold

Brandenburgische Technische Universität

Riccardo Arpaia

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Politecnico di Milano

Ying Ying Peng

Beijing University of Technology

Politecnico di Milano

Roberto Fumagalli

Politecnico di Milano

Lucio Braicovich

European Synchrotron Radiation Facility (ESRF)

Politecnico di Milano

Carlo Di Castro

Sapienza, Università di Roma

Marco Grilli

Sapienza, Università di Roma

Consiglio Nazionale delle Ricerche (CNR)

Giacomo Claudio Ghiringhelli

Politecnico di Milano

Sergio Caprara

Sapienza, Università di Roma

Consiglio Nazionale delle Ricerche (CNR)


2399-3650 (ISSN)

Vol. 4 1 7


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