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CHARGES OF MATTER. “More than a century ago the single electron was discovered to have a unique monopole charge. Diatomic molecules became classified after their electric dipole moment. The possible existence of the Dirac magnetic monopole would have fundamental consequences) and has been much discussed.” https://journals.jps.jp/doi/full/10.7566/JPSJ.87.041008 View in LinkedIn

FRAGMENT FROM NATURE continues from last weekend and concludes this weekend on pushing the limits of time crystals for looking at condensed matter physics phenomena in other dimensions including time. Hold onto your dentures, this is a wild ride and worth the effort! https://lnkd.in/e5UXiem5 View in LinkedIn

MAGNETIC MULTIPOLES. “The multipole formulation has proven to be a very fruitful as well as foundational concept in physics.” https://lnkd.in/eQBMcYEJ View in LinkedIn

The f electron orbitals are asymmetric, can be unfilled and account for many physical and chemical properties of matter. https://lnkd.in/eaQ4p_NY View in LinkedIn

MOIRÉ INTERFERENCE PATTERNS. “Moiré systems formed by 2D atomic layers have widely tunable electrical and optical properties and host exotic, strongly correlated and topological phenomena, including superconductivity, correlated insulator states and orbital magnetism.” https://www.nature.com/articles/s41578-021-00284-1 View in LinkedIn

APPLICABILITY. “Recently, first-principles electronic structure calculations have been shown to be suitable for investigation of the multipole ordered states in correlated solid state materials.” https://journals.jps.jp/doi/full/10.7566/JPSJ.87.041008 View in LinkedIn

FIRST PRINCIPLES. “To treat multipolar degrees of freedom from first principles, it is thus needed to treat strong local electron correlations, spin–orbit interaction, and the multi-orbital f electron character on an equal footing.” https://journals.jps.jp/doi/full/10.7566/JPSJ.87.041008 View in LinkedIn

F ELECTRON ORBITALS. “The electron orbital letters go in the order s, p, d, f, g, h, i, j, etc. At the fourth and higher levels, there are seven f orbitals in addition to the 4s, 4p, and 4d orbitals. Counting the 4s, 4p, and 4d orbitals, this makes a total of 16 orbitals in the fourth level. They have even more complicated shapes. s, p, d, and f orbitals are available at all higher energy levels as well.” (Great graphics). https://lnkd.in/eaQ4p_NY View in LinkedIn

F ELECTRONS AND MULTIPOLARS. “These compounds have in common that the exotic multipolar electric or magnetic distribution occurs on the lanthanide or actinide ion and are thus generated by the f electrons.” https://journals.jps.jp/doi/full/10.7566/JPSJ.87.041008 View in LinkedIn

THE RARE MULTIPOLARS. “Thus far, true multipolar order has been discovered, or predicted, for about a dozen crystalline materials.” https://journals.jps.jp/doi/full/10.7566/JPSJ.87.041008 View in LinkedIn