| Full text | |
| Author(s): |
Piva, Mario M.
[1, 2, 3]
;
Rahn, Marein C.
[1, 4]
;
Thomas, Sean M.
[1]
;
Scott, Brian L.
[1]
;
Pagliuso, Pascoal G.
[2]
;
Thompson, Joe D.
[1]
;
Schoop, Leslie M.
[5]
;
Ronning, Filip
[1]
;
Rosa, Priscila F. S.
[1]
Total Authors: 9
|
| Affiliation: | [1] Los Alamos Natl Lab, Los Alamos, NM 87545 - USA
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[3] Max Planck Inst Chem Phys Solids, D-01187 Dresden - Germany
[4] Tech Univ Dresden, Inst Solid State & Mat Phys, D-01062 Dresden - Germany
[5] Princeton Univ, Dept Chem, Princeton, NJ 08544 - USA
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | CHEMISTRY OF MATERIALS; v. 33, n. 11, p. 4122-4127, JUN 8 2021. |
| Web of Science Citations: | 0 |
| 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 14/mmm parent structure are promising clean narrow-gap semiconductors. (AU) | |
| FAPESP's process: | 17/10581-1 - Emergent phenomena in reduced dimension systems |
| Grantee: | Pascoal Jose Giglio Pagliuso |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 15/15665-3 - Studies of orbital differentiation effects in the magnetic and superconducting properties of FeAs based compounds |
| Grantee: | Mário Moda Piva |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |