Pressure-induced switching of electronic nematicity in the iron-based ladder materials BaFe2(S1-xSex)3 (x=0-1)

We examined a pressure dependence of an electronic nematicity in iron-based ladder materials BaFe2(S1-xSex)3 with a quasi-one-dimensional ladder lattice by tracking an anomaly in the resistivity. For x = 0, the ferroic nematicity observed at ambient pressure is stabilized by applying pressure up to 2 GPa. For x = 0.25, 0.60, and 1, the antiferroic nematicity at ambient pressure switches into ferroic nematicity by applying pressures of 0.50-4.0 GPa. We present the electronic phase diagram of BaFe2(S1-xSex)3 in terms of the lattice parameters, and discuss the relationship between the nematicity and bandwidth. We also discuss that the external pressure causes a filling control through the charge transfer from anions to cations in the Se-rich compositions.