Substrate tuning of the structural and electronic transition in thin flakes of the excitonic insulator candidate Ta 2 NiSe 5
The episode discusses a paper on substrate tuning of Ta2NiSe5 to study its excitonic insulator phase transition. The researchers used gold (Au) versus aluminum oxide (Al2O3) substrates to show that interface effects significantly shift the transition temperature, confirming excitonic interactions. They suggest future work involving doping and pressure to gain active control over these correlated materials.