NMR evidence for a Peierls transition in the layered square-net compound LaAgSb${}_2$

Seung-Ho Baek, Sergey L. Bud'ko, Paul C. Canfield +2

We measured the central ($1/2\leftrightarrow -1/2$) and first satellite ($\pm 3/2\leftrightarrow \pm 1/2$) lines of the \la\ NMR spectra as a function of temperature in LaAgSb${}_2$, i…