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- W4288055835 abstract "This paper is written for the Special Issue in Honor of Emmanuel Rashba. We study the gas of indirect dipolar excitons created by an interband illumination of a pentalayer WSe$_2$/MoSe$_2$/WSe$_2$/MoSe$_2$/WSe$_2$. We show that two colinear indirect excitons bind into a linear biexciton with twice larger dipole moment. Two biexcitons with opposite dipole directions attract each other at large distances and repel each other at short distances. Therefore, biexcitons form a staggered crystal with anti-ferroelectric square lattice. The electrostatic energy of this crystal per biexciton has a minimum at the biexciton concentration $n =n_c=0.14d^{-2}$, where $d sim 0.7$ nm is a single layer thickness. At small illumination intensity, biexcitons condense into sparse crystallites with $n = n_c$, where photoluminescence frequency is red shifted and independent on the light intensity. We also study a capacitor made of five identical semiconductor monolayers separated by hBN spacers where a critical voltage applied between layers 1, 3, 5, and 2, 4 abruptly creates a similar biexciton crystal. At this voltage, the differential capacitance diverges." @default.
- W4288055835 created "2022-07-28" @default.
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- W4288055835 date "2022-07-22" @default.
- W4288055835 modified "2023-10-17" @default.
- W4288055835 title "Biexciton crystal in a two-dimensional semiconductor heteropentalayer" @default.
- W4288055835 doi "https://doi.org/10.48550/arxiv.2207.11319" @default.
- W4288055835 hasPublicationYear "2022" @default.
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