Pressure-dependent pump-probe data on Ta2NiSe5 track phase transitions at about 1 and 3 GPa, and a Rothwarf-Taylor analysis gives a bandgap pressure coefficient of 65 meV/GPa, close to a DFT value of 70 meV/GPa.
Bronold and Holger Fehske
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Pressure Dependence of Ultrafast Carrier Dynamics in Excitonic Insulator Ta$_2$NiSe$_5$
Pressure-dependent pump-probe data on Ta2NiSe5 track phase transitions at about 1 and 3 GPa, and a Rothwarf-Taylor analysis gives a bandgap pressure coefficient of 65 meV/GPa, close to a DFT value of 70 meV/GPa.