Ti3O5's room-temperature insulator consists of zig-zag titanium dimer chains with orbital-selective bonds; heating breaks one dimer type causing orbital repopulation and metallization, while pressure induces a different metallization via intra- versus inter-dimer hopping competition.
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Two pathways to break the insulating state in a correlated transition metal oxide
Ti3O5's room-temperature insulator consists of zig-zag titanium dimer chains with orbital-selective bonds; heating breaks one dimer type causing orbital repopulation and metallization, while pressure induces a different metallization via intra- versus inter-dimer hopping competition.