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Kondo Effect

All articles tagged with #kondo effect

physics2 years ago•3 min saved

"Breakthrough: German Scientists Solve Key Condensed Matter Physics Puzzle"

A team of physicists at the University of Cologne has successfully observed the Kondo effect in an artificial atom using a scanning tunneling microscope, marking a significant breakthrough in condensed matter physics. Their innovative approach allowed them to directly observe the Kondo effect in a one-dimensional wire floating above a metallic sheet of graphene, validating theoretical predictions and opening new possibilities for exploring exotic states of matter.

via SciTechDaily|

#artificial-atom #condensed-matter-physics #kondo-effect

science2 years ago•2 min saved

Unveiling the Surprising Truth Behind Quantum Spinaron Effect

Physicists from the Julius Maximilian University of Würzburg and the Jülich Research Centre have discovered a new quantum state called the spinaron. This state occurs when a cobalt atom on a copper surface is subjected to a strong magnetic field, causing its spin direction to continuously switch back and forth. The discovery challenges existing assumptions about the behavior of low-temperature conductive materials and the Kondo effect, which explains certain types of quantum activity. The researchers believe that many previous observations might actually be describing the spinaron effect, potentially rewriting the history of theoretical quantum physics. While the discovery has no immediate practical use, it contributes to a greater understanding of how materials and forces work at the atomic level.

via ScienceAlert|

#cobalt-atom #copper-surface #kondo-effect

science2 years ago•5 min saved

Quantum Spinaron Disrupts Kondo Effect

Experimental physicists have discovered a new quantum effect called the "spinaron," challenging the long-held Kondo effect. By placing individual cobalt atoms on a copper surface and subjecting them to a powerful magnetic field, researchers observed the spinaron effect, where the cobalt atom's changing magnetization excites the copper electrons. This finding contradicts the Kondo effect, which has been the standard model for the interaction of magnetic materials with metals. While the practical applications of this discovery are limited, it could contribute to advancements in understanding magnetic moments and pave the way for future developments in spintronics.

via Phys.org|

#cobalt-atom #copper-surface #kondo-effect

physics2 years ago•3 min saved

"Semiconductor Lattice Unites Electrons and Magnetic Moments"

Physicists have created a model system by stacking a pair of monolayer semiconductors to study the Kondo lattice problem, which involves a regular lattice of magnetic moments. The researchers simulated the Kondo lattice by rotating the layers at a 180-degree angle, resulting in a moiré lattice pattern that traps individual electrons in tiny slots. The simplified Kondo lattice only needs a battery, and when a voltage is applied just right, the material is ordered into forming a lattice of spins, producing a continuously tunable system. The tunability can induce quantum phase transitions whereby heavy electrons turn into light electrons with the possible emergence of a "strange" metal phase.

via Phys.org|

#heavy-fermions #kondo-effect #physics