Stabilizing electromagnons in CuO under pressure

Abstract Electromagnons (Electroactive spin wave excitations) could prove to be decisive in information technologies but they remain fragile quantum objects, mainly existing at low temperatures. Any future technological application requires overcoming these two limitations. By means of synchrotron radiation infrared spectroscopy performed the THz energy range and under hydrostatic pressure, we tracked electromagnon cupric oxide CuO, despite its very absorption intensity. We demonstrate how a pressure 3.3 GPa strongly increases strength expands existence large temperature enhanced by 40 K. Accordingly, combined effects make CuO more ductile object. Numerical simulations based on an extended Heisenberg model were Monte-Carlo technique dynamics account for magnetic phase diagram CuO. They enable simulate absorbance response electromagnons range.