Observation of Scissors Modes in solid state systems with a SQUID

TL;DR

This paper proposes a novel experimental method using a SQUID to detect scissors modes in crystals with deformed ions, overcoming previous challenges related to their uncertain energy range and narrow spectral widths.

Contribution

It introduces a new experimental approach employing SQUIDs to observe scissors modes in solid state systems, addressing limitations of previous resonance fluorescence techniques.

Findings

Proposed a SQUID-based detection method for scissors modes.

Discussed the feasibility of observing modes with high spectral resolution.

Outlined experimental setup to measure magnetic field variations associated with modes.

Abstract

The occurrence of scissors modes in crystals that have deformed ions in their cells has been predicted some time ago. The theoretical value of their energy is rather uncertain, however, ranging between 10 and a few tenths of eV, with the corresponding widths of 10^-7, 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. We propose and discuss a new experiment in which such difficulties are overcome by measuring with a SQUID the variation of the magnetic field associated with the excitation of scissors modes.