Low-energy spin excitations in field-induced phases of the spin-ladder antiferromagnet BiCu${}_2$PO${}_6$

Patrick Pilch, Kirill Amelin, Gary Schmiedinghoff +13

We report on terahertz spectroscopic measurements of quantum spin dynamics on single crystals of a spin-1/2 frustrated spin-ladder antiferromagnet BiCu${}_2$PO${}_6$ as a function of t…