According to Hughes and Bernevig, the current research started as an effort to generalize the dipole moment theory to higher multipole moments. Hughes recounts, "At the earliest stages, Andrei and I ...
Multipole theory of linear constitutive relations for the response fields D and H in dielectrics is incomplete in the sense that it yields unphysical (for example, origin-dependent) results when taken ...
A research team has successfully designed and tested a novel superconducting solenoid. Through the optimization of the pole ...
The first “quadrupole topological insulator” has been created in a mechanical metamaterial by physicists in Switzerland. The experiment confirms a theoretical prediction made in 2017 that the concepts ...
IT is well known that, by giving prolonged exposures, many forbidden lines appear in X-ray emission spectra violating the dipole selection rules derived from theory. Most of the forbidden lines obey ...
Researchers at the University of Illinois at Urbana-Champaign and Princeton University have theoretically predicted a new class of insulating phases of matter in crystalline materials, pinpointed ...
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