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Probing electron quadrupling order through ultrasound
- Publication Year :
- 2024
-
Abstract
- Recent experiments have pointed to the formation of a new state of matter, the electron quadrupling condensate in Ba$_{1-x}$K$_x$Fe$_2$As$_2$ . The state spontaneously breaks time-reversal symmetry and is sandwiched between two critical points, separating it from the superconducting and normal metal states. The adjacent two critical points make acoustic effects a promising tool to study such states because of their sensitivity to symmetry-breaking transitions. We report a theory of the acoustic effects of systems with an electron quadrupling phase and new ultrasound velocity measurements of Ba$_{1-x}$K$_x$Fe$_2$As$_2$ single crystals. The presented theory for the electron quadrupling state gives the same type of singularities that are observed in experiment.<br />Comment: 11 pages, 6 figures
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2404.03020
- Document Type :
- Working Paper