Scientific Achievement

  • Researchers in the Van der Waals program report Evidence for two-component exciton condensates in MoSe2/hBN/WSe2 electron-hole bilayers

Significance and Impact

  • Established van der Waals electron-hole bilayers as a platform for electrically tunable, multicomponent Bose-Einstein condensates with spin-valley internal structure

Research Details

  • Magneto-optical spectroscopy measures electron and hole spin-valley susceptibilities in equilibrium exciton fluids
  • At zero magnetic field, two intravalley exciton flavors condense coherently
  • Magnetic field switches the condensate to intervalley and then single-component phases; the condensate dome persists to about 1.8 K

Publication Details

R. Qi, Q. Li, J. Nie, R. Xia, H. Kim, H. Lim, J. Xie, T. Taniguchi, K. Watanabe, M.F. Crommie, A.H. MacDonald, F. Wang, Nature (2026).

DOI: 10.1038/s41586-026-10636-y

Work was performed at Lawrence Berkeley National Lab.