2014/04/30 by M. M. Fogler, L. V. Butov, Kostya S. Novoselov +1 · 7 citations
Materials Science · Physics and Astronomy · #2D Materials and Applications #Boson #Condensed matter physics #Cooper pair #Degenerate energy levels #Exciton #Heterojunction #MXene and MAX Phase Materials #Materials science #Molecule #Monolayer #Nanotechnology #Physics #Quantum mechanics #Superconductivity #Superconductivity in MgB2 and Alloys #Superfluidity #cond-mat.mes-hall #cond-mat.mtrl-sci #van der Waals force
paper · pdf · doi:10.1038/ncomms5555
published as Nat. Commun. 5, 4555 (2014) · 7 pages, 4 figures
arxiv created 2014/07/28 · openalex publication_date 2014/07/28 · arxiv updated 2014/07/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
All known superfluid and superconducting states of condensed matter are enabled by composite bosons (atoms, molecules, Cooper pairs) made of an even number of fermions. Temperatures where such macroscopic quantum phenomena occur are limited by the lesser of the binding energy and the degeneracy temperature of the bosons. High critical temperature cuprate superconductors set the present record of ~100 K. Here we propose a design for artificially structured materials to rival this record. The main elements of the structure are two monolayers of a transition metal dichalcogenide separated by an atomically thin spacer. Electrons and holes generated in the system would accumulate in the opposite monolayers and form bosonic bound states --- the indirect excitons. The resultant degenerate Bose gas of indirect excitons would exhibit macroscopic occupation of a quantum state and vanishing viscosity at high temperatures.