title: Observation of scissors modes in solid state systems with a SQUID.
abstract: The occurrence of scissors modes in crystals that have deformed ions in their unit cells was predicted some time ago. The theoretical value of their energy is rather uncertain, however, ranging between ten and a few tens of eV, with the corresponding widths of 10(-7) to 10(-6) eV. Their observation by resonance fluorescence experiments therefore requires a photon spectrometer covering a wide energy range with a very high resolving power. Here, a new experiment is proposed and discussed in which such difficulties are overcome by measuring with a superconducting quantum interference device (SQUID) the variation of the magnetic field associated with the excitation of scissors modes.
authors.affiliation: Département Matériaux Nanosciences, Institut de Physique de Rennes, UMR UR1-CNRS 6251, Université de Rennes 1, F-35042 Rennes Cedex, France.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Hatada
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via E. Fermi 40, CP 13, I-00044 Frascati, Italy.
authors.forename: Kuniko
authors.initials: K
authors.lastname: Hayakawa
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via E. Fermi 40, CP 13, I-00044 Frascati, Italy.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Palumbo
authors.affiliation: INFN Laboratori Nazionali di Frascati, Via E. Fermi 40, CP 13, I-00044 Frascati, Italy.
authors.forename: Augusto
authors.initials: A
authors.lastname: Marcelli
keywords: SQUID; collective magnetic excitations; rotor model of deformed ions; scissors modes