High-temperature superfluidity with indirect excitons in van der Waals heterostructures

摘要: All known superfluid and superconducting states of condensed matter are enabled by composite bosons (atoms, molecules Cooper pairs) made an even number fermions. Temperatures where such macroscopic quantum phenomena occur limited the lesser binding energy degeneracy temperature bosons. High-critical cuprate superconductors set present record ~100 K. Here we propose a design for artificially structured materials to rival this record. The main elements structure two monolayers transition metal dichalcogenide separated atomically thin spacer. Electrons holes generated in system would accumulate opposite form bosonic bound states--the indirect excitons. resultant degenerate Bose gas excitons exhibit occupation state vanishing viscosity at high temperatures.