@article{f01b6dc0be0e4b9eb4b3da991904643c,
title = "Robust Narrow-Gap Semiconducting Behavior in Square-Net La3Cd2As6",
abstract = "Narrow-gap semiconductors are sought-after materials due to their potential for long-wavelength detectors, thermoelectrics, and more recently nontrivial topology. Here, we report the synthesis and characterization of a new family of narrow-gap semiconductors, R3Cd2As6 (R = La and Ce). Single-crystal X-ray diffraction at room temperature reveals that the As square nets distort and Cd vacancies order in a monoclinic superstructure. A putative charge-density ordered state sets in at 279 K in La3Cd2As6 and at 136 K in Ce3Cd2As6 and is accompanied by a substantial increase in the electrical resistivity in both compounds. The resistivity of the La member increases by 13 orders of magnitude on cooling, which points to a remarkably clean semiconducting ground state. Our results suggest that light square-net materials within an I4/mmm parent structure are promising clean narrow-gap semiconductors.",
author = "Piva, {Mario M.} and Rahn, {Marein C.} and Thomas, {Sean M.} and Scott, {Brian L.} and Pagliuso, {Pascoal G.} and Thompson, {Joe D.} and Schoop, {Leslie M.} and Filip Ronning and Rosa, {Priscila F.S.}",
note = "Funding Information: We acknowledge useful discussions with Peter Abbamonte. Work at Los Alamos was performed under the auspices of the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering under project “Quantum Fluctuations in Narrow-Band Systems”. This work was also supported by the S{\~a}o Paulo Research Foundation (FAPESP) grants 2015/15665-3, 2017/10581-1, 2017/25269-3, CNPq grant #304496/2017-0, and CAPES, Brazil. Scanning electron microscopy and EDX measurements were performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. This research has been supported by the Deutsche Forschungsgemeinschaft through the SFB 1143 and the W{\"u}rzburg-Dresden Cluster of Excellence EXC 2147 (ct.qmat). Work at Princeton was supported by the Arnold and Mabel Beckman Foundation through a Beckman Young Investigator grant awarded to L.M.S. Funding Information: We acknowledge useful discussions with Peter Abbamonte. Work at Los Alamos was performed under the auspices of the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering under project ?Quantum Fluctuations in Narrow-Band Systems?. This work was also supported by the Sa?o Paulo Research Foundation (FAPESP) grants 2015/15665-3, 2017/10581-1, 2017/25269-3, CNPq grant #304496/2017-0, and CAPES, Brazil. Scanning electron microscopy and EDX measurements were performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. This research has been supported by the Deutsche Forschungsgemeinschaft through the SFB 1143 and the Wu?rzburg-Dresden Cluster of Excellence EXC 2147 (ct.qmat). Work at Princeton was supported by the Arnold and Mabel Beckman Foundation through a Beckman Young Investigator grant awarded to L.M.S. Publisher Copyright: {\textcopyright} 2021 American Chemical Society. All rights reserved.",
year = "2021",
month = jun,
day = "8",
doi = "10.1021/acs.chemmater.1c00797",
language = "English (US)",
volume = "33",
pages = "4122--4127",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "11",
}