On superfluidity of indirect excitons in transition metals trichalcogenides van der Waals heterostructures

TL;DR

This paper predicts angle-dependent superfluidity of indirect excitons in transition metals trichalcogenides (TMTC) heterostructures, highlighting anisotropic superfluid transition temperatures and proposing experimental observation methods.

Contribution

It introduces the concept of angle-dependent superfluidity in TMTC heterostructures and analyzes the influence of screening effects using different interaction potentials.

Findings

Superfluidity temperature varies with angle, showing maxima and minima along different directions.

Screening effects significantly influence the superfluid transition temperature.

Proposal for experimental detection of anisotropic superfluidity in TMTC heterostructures.

Abstract

We predict angle-dependent superfluidity for a new class of 2D materials -- transition metals trichalcogenides (TMTC). Within a mean-field approach superfluidity of indirect excitons in TMTC van der Waals heterostructures (vdWHs) is studied. We use different potentials for charged carriers interaction to analyze the influence of the screening on the studied phenomena. Our study demonstrates the angle-dependent superfluidity temperature in TMTC vdWHs: for a given density a maximum and minimum $T_c$ of superfluidity occurs along chain and $a$-directions, respectively. This work can guide experimental research toward the realization of anisotropic superfluidity in TMTC vdWH. We suggest an experiment for the observation of anisotropic superfluidity in TMTC vdWH.