Samuel Poncé^1,2*, Miquel Royo^3*, Massimiliano Stengel^3,4*, Nicola Marzari^2,5*, Marco Gibertini^6,7*

1 Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Chemin des Étoiles 8, B-1348 Louvain-la-Neuve, Belgium

2 Theory and Simulation of Materials (THEOS), École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

3 Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain

4 Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluı́s Companys, 23, 08010 Barcelona, Spain

5 National Centre for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

6 Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia, Via Campi 213/a I-41125 Modena, Italy

7 Centro S3, Istituto Nanoscienze-CNR, Via Campi 213/a, I-41125 Modena, Italy

* Corresponding authors emails: samuel.ponce@uclouvain.be, mroyo@icmab.es, mstengel@icmab.es, nicola.marzari@epfl.ch, marco.gibertini@unimore.it

DOI10.24435/materialscloud:gf-5j [version v1]

Publication date: Apr 05, 2023

How to cite this record

Samuel Poncé, Miquel Royo, Massimiliano Stengel, Nicola Marzari, Marco Gibertini, Long-range electrostatic contribution to the electron-phonon couplings and mobilities of two-dimensional and bulk materials, Materials Cloud Archive 2023.58 (2023), https://doi.org/10.24435/materialscloud:gf-5j

Description

Charge transport plays a crucial role in manifold potential applications of two-dimensional materials, including field effect transistors, solar cells, and transparent conductors. At most operating temperatures, charge transport is hindered by scattering of carriers by lattice vibrations. Assessing the intrinsic phonon-limited carrier mobility is thus of paramount importance to identify promising candidates for next-generation devices. Here we provide a framework to efficiently compute the drift and Hall carrier mobility of two-dimensional materials through the Boltzmann transport equation by relying on a Fourier-Wannier interpolation. Building on a recent formulation of long-range contributions to dynamical matrices and phonon dispersions [Phys. Rev. X 11, 041027 (2021)], we extend the approach to electron-phonon coupling including the effect of dynamical dipoles and quadrupoles. We identify an unprecedented contribution associated with the Berry connection that is crucial to preserve the Wannier-gauge covariance of the theory. This contribution is not specific to 2D crystals, but also concerns the 3D case, as we demonstrate via an application to bulk SrO. We showcase our method on a wide selection of relevant monolayers ranging from SnS₂ to MoS₂, graphene, BN, InSe, and phosphorene. We also discover a non-trivial temperature evolution of the Hall hole mobility in InSe whereby the mobility increases with temperature above 150~K due to the mexican-hat electronic structure of the InSe valence bands. Overall, we find that dynamical quadrupoles are essential and can impact the carrier mobility in excess of 75%.

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Keywords

electron-phonon coupling MARVEL transport 2D materials ab initio first principles