Terahertz Fingerprint of Monolayer Wigner Crystals
Artikel i vetenskaplig tidskrift, 2022

The strong Coulomb interaction in monolayer semiconductors represents a unique opportunity for the realization of Wigner crystals without external magnetic fields. In this work, we predict that the formation of monolayer Wigner crystals can be detected by their terahertz response spectrum, which exhibits a characteristic sequence of internal optical transitions. We apply the density matrix formalism to derive the internal quantum structure and the optical conductivity of the Wigner crystal and to microscopically analyze the multipeak shape of the obtained terahertz spectrum. Moreover, we predict a characteristic shift of the peak position as a function of charge density for different atomically thin materials and show how our results can be generalized to an arbitrary two-dimensional system.

transition metal dichalcogenides

Terahertz spectroscopy

density matrix theory

Wigner crystal

2D materials

Författare

Samuel Brem

Philipps-Universität Marburg

Ermin Malic

Chalmers, Fysik, Kondenserad materie- och materialteori

Philipps-Universität Marburg

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 22 3 1311-1315

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.1021/acs.nanolett.1c04620

PubMed

35048702

Mer information

Senast uppdaterat

2022-04-05