Saturday, July 29, 2023

‘Strange metal’ sends quantum research in circles

Amazing stuff! 

If we humans can crack superconductivity than e.g. the Global Warming hoax and Climate Change religion will go away like a Fata Morgana and will quickly end up in the dustbin of history of failed human obsessions where it belongs!

"... Identified more than 40 years ago, strange metal is a state of matter found in many quantum materials — including certain superconductors that scientists say may be vital for high-tech products of the future. The “strange” part of strange metal is its electrons: they defy the traditional rules for electron movement and conductivity.
Unlike most metals, in which electrical resistance increases with the square of temperature, strange metals have an electrical resistance that increases in proportion to temperature. This “linear-in-temperature” behavior defies physicists’ understanding of how electrons move in solids. ...
in the study, ... found a discernible, circular scattering pattern in the way electrons move within strange metal. ...
Using a method called resonant inelastic X-ray scattering (RIXS), they saw that electrons created fluctuating waves of electrical charge in all directions. ..."

From the abstract (Unfortunately this abstract was written only for nerds. Some scientists have bad habits!):
"Most resonant inelastic x-ray scattering (RIXS) studies of dynamic charge order correlations in the cuprates have focused on the high-symmetry directions of the copper oxide plane. However, scattering along other in-plane directions should not be ignored as it may help understand, for example, the origin of charge order correlations or the isotropic scattering resulting in strange metal behavior. Our RIXS experiments reveal dynamic charge correlations over the qx-qy scattering plane in underdoped Bi2Sr2CaCu2O8+δ. Tracking the softening of the RIXS-measured bond-stretching phonon, we show that these dynamic correlations exist at energies below approximately 70 meV and are centered around a quasi-circular manifold in the qx-qy scattering plane with radius equal to the magnitude of the charge order wave vector, qCO. This phonon-tracking procedure also allows us to rule out fluctuations of short-range directional charge order (i.e., centered around [qx = ±qCO, qy = 0] and [qx = 0, qy = ±qCO]) as the origin of the observed correlations."

‘Strange metal’ sends quantum researchers in circles | YaleNews A Yale-led team of physicists has discovered a circular pattern in the movement of electrons in a group of quantum materials known as “strange metals.”


Fig. 3. Models of phonon softening for QCDCs and directional order.


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