# Electronic and phononic properties of a two dimensional electron gas coupled to dipolar phonons via small-momentum-transfer scattering

## TL;DR

This study uses sign-problem-free quantum Monte Carlo simulations to analyze the electron and phonon spectral functions and superconductivity in a 2D electron gas coupled to dipolar phonons, relevant to high-temperature superconductors at FeSe/SrTiO3 interfaces.

## Contribution

It provides the first sign-problem-free quantum Monte Carlo analysis of a 2D electron gas coupled to dipolar phonons without additional approximations.

## Key findings

- Enhanced electron-phonon interactions at small momentum transfer.
- Superconductivity observed in the model system.
- Relevance to high-temperature superconductivity at oxide interfaces.

## Abstract

We study the electron and phonon spectral functions as well as superconductivity for a two dimensional electron gas couped to dipolar phonons via small-momentum transfer scattering. The results reported here are obtained through sign-problem-free quantum Monte-Carlo simulation. Hence aside from modeling there is no further approximations. Our results can be relevant to the high-temperature superconductor at the interface between a unit-cell-thick FeSe and SrTiO3.