@article{33dea66d82824e50b15081b48dad5a46,
title = "Nonuniform carrier density in Cd3As2 evidenced by optical spectroscopy",
abstract = "We report the detailed optical properties of Cd3As2 crystals in a wide parameter space: temperature, magnetic field, carrier concentration, and crystal orientation. We investigate high-quality crystals synthesized by three different techniques. In all the studied samples, independently of how they were prepared and how they were treated before the optical experiments, our data indicate conspicuous fluctuations in the carrier density (up to 30%). These charge puddles have a characteristic scale of 100 μm, they become more pronounced at low temperatures, and possibly, they become enhanced by the presence of crystal twinning. The Drude response is characterized by very small scattering rates (∼1 meV) for as-grown samples. Mechanical treatment, such as cutting or polishing, influences the optical properties of single crystals, by increasing the Drude scattering rate and also modifying the high-frequency optical response. Magnetoreflectivity and Kerr rotation are consistent with electronlike charge carriers and a spatially nonuniform carrier density.",
author = "I. Crassee and E. Martino and Homes, {C. C.} and O. Caha and J. Nov{\'a}k and P. T{\"u}ckmantel and M. Hakl and A. Nateprov and E. Arushanov and Gibson, {Q. D.} and Cava, {R. J.} and Koohpayeh, {S. M.} and Arpino, {K. E.} and McQueen, {T. M.} and M. Orlita and Ana Akrap",
note = "Funding Information: I.C. acknowledges funding from the Postdoc.Mobility fellowship of the Swiss National Science Foundation. A.A. acknowledges funding from the Ambizione fellowship of the Swiss National Science Foundation. This work has been supported by the ERC via project MOMB and by MEYS project CEITEC 2020 (No. LQ1601), as well as ANR DIRAC3D and TWINFUSYON (No. 692034). Work at BNL was supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Contract No. DE-SC0012704. Part of this work was done at Soleil, proposal No, 20151043 on SMIS beamline. Work at the Institute for Quantum Matter (IQM) was supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through Grant No. DE-FG02-08ER46544. T.M.M. acknowledges support of the David and Lucile Packard Foundation. Partial funding for this work was provided by the Johns Hopkins University Catalyst Fund. The authors acknowledge illuminating discussions with Krzystof Grasza, Alexey Kuzmenko, and Neven Bari{\v s}i{\'c}, generous help with the samples from N. Peter Armitage and Frederic Teppe, as well as helpful comments from Nathaniel Miller. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",
year = "2018",
month = mar,
day = "22",
doi = "10.1103/PhysRevB.97.125204",
language = "English (US)",
volume = "97",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "12",
}