Strongly correlated systems are physical systems in which electron–electron (or more generally particle–particle) interactions are comparable to or larger than their kinetic energy, invalidating independent-particle or mean-field descriptions. In such systems, many-body effects dominate, leading to emergent phenomena such as Mott insulating behavior, unconventional superconductivity, non-Fermi-liquid states, heavy-fermion behavior, and complex magnetic orders. Their theoretical treatment typically requires beyond-perturbative methods, including dynamical mean-field theory, quantum Monte Carlo, tensor-network approaches, and exact diagonalization. Strong correlations are central in materials such as transition-metal oxides, cuprates, organics, and ultra-cold atomic gases engineered to simulate lattice models like the Hubbard or t–J models.
A new route to materials with complex disordered magnetic properties at the quantum level has been produced by scientists for the first time. The material, based on a framework of ruthenium, fulfills the requirements of the ...
Condensed Matter
Nov 15, 2024
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Quantum computers hold the promise to emulate complex materials, helping researchers better understand the physical properties that arise from interacting atoms and electrons. This may one day lead to the discovery or design ...
Condensed Matter
Oct 30, 2024
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Moiré superlattices are materials consisting of two layers stacked on top of each other with either a small rotational misalignment or a lattice mismatch between them. The Kondo lattice model, on the other hand, describes ...
A new study led by Rice University's Qimiao Si has unveiled a new class of quantum critical metal, shedding light on the intricate interactions of electrons within quantum materials. Published in Physical Review Letters on ...
Condensed Matter
Sep 6, 2024
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200
A research group led by scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory has uncovered details about the formation and behavior of mobile, microscopic, particle-like objects called "excitons" ...
Condensed Matter
Aug 19, 2024
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When the number of electrons matches host lattice sites in a material, strong interactions between electrons can cause them to arrange themselves into an orderly pattern, forming what is known as an electron crystal. This ...
Quantum Physics
Jul 30, 2024
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In a study published in Nature, a research team has, for the first time, observed the antiferromagnetic phase transition within a large-scale quantum simulator of the fermionic Hubbard model (FHM).
Superconductivity
Jul 10, 2024
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In a paper published today in Nature Communications, researchers unveiled previously unobserved phenomena in an ultra-clean sample of the correlated metal SrVO3. The study offers experimental insights that challenge the prevailing ...
Condensed Matter
Jun 24, 2024
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In the realm of condensed matter physics, few phenomena captivate physicists' curiosity as much as Mott insulators. According to traditional theory, this odd class of materials should be capable of conducting electricity, ...
Condensed Matter
May 2, 2024
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92
By tinkering with a quantum material characterized by atoms arranged in the shape of a sheriff's star, MIT physicists and colleagues have unexpectedly discovered a new way to make a state of matter known as a strange metal. ...
Condensed Matter
May 1, 2024
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