TY - JOUR
T1 - Synthesis of Layered Gold Tellurides AuSbTe and Au2Te3 and Their Semiconducting and Metallic Behavior
AU - Pappas, Emma A.
AU - Zhang, Rong
AU - Peng, Cheng
AU - Busch, Robert T.
AU - Zuo, Jian Min
AU - Devereaux, Thomas P.
AU - Shoemaker, Daniel P.
N1 - The materials syntheses, transport, and microstructure characterization were supported by the Center for Quantum Sensing and Quantum Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, under Award DE-SC0021238. The authors acknowledge the use of microscopy facilities at the Materials Research Laboratory Central Research Facilities, University of Illinois, and the use of facilities and instrumentation supported by the National Science Foundation through the University of Illinois Materials Research Science and Engineering Center (DMR-1720633). Computations conducted by R.Z. and C.P. were supported by the U.S. DOE, Office of Science, Basic Energy Sciences, under Award DE-AC02-76SF00515. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. DOE under Contract DE-AC02-05CH11231 using NERSC Award BES-ERCAP0027203. R.Z. and C.P. thank Brian Moritz and Chunjing Jia for insightful discussions.
PY - 2025/2/3
Y1 - 2025/2/3
N2 - Previous studies on natural samples of pampaloite (AuSbTe) revealed the crystal structure of a potentially cleavable and/or exfoliable material, while studies on natural and synthetic montbrayite (Sb-containing Au2Te3) claimed various chemical compositions for this low-symmetry compound. Few investigations of synthetic samples have been reported for both materials, leaving much of their chemical, thermal, and electronic characteristics unknown. Here, we investigate the stability, electronic properties, and synthesis of the gold antimony tellurides AuSbTe and Au1.9Sb0.46Te2.64 (montbrayite). Differential thermal analysis and in situ powder X-ray diffraction revealed that AuSbTe is incongruently melting, while Au1.9Sb0.46Te2.64 is congruently melting. Calculations of the band structures and four-point resistivity measurements showed that AuSbTe is a semiconductor and Au1.9Sb0.46Te2.64 a metal. Various synthesis attempts confirmed the limited stable chemical composition of Au1.9Sb0.46Te2.64, identified successful methods to synthesize both compounds, and highlighted the challenges associated with single-crystal synthesis of AuSbTe.
AB - Previous studies on natural samples of pampaloite (AuSbTe) revealed the crystal structure of a potentially cleavable and/or exfoliable material, while studies on natural and synthetic montbrayite (Sb-containing Au2Te3) claimed various chemical compositions for this low-symmetry compound. Few investigations of synthetic samples have been reported for both materials, leaving much of their chemical, thermal, and electronic characteristics unknown. Here, we investigate the stability, electronic properties, and synthesis of the gold antimony tellurides AuSbTe and Au1.9Sb0.46Te2.64 (montbrayite). Differential thermal analysis and in situ powder X-ray diffraction revealed that AuSbTe is incongruently melting, while Au1.9Sb0.46Te2.64 is congruently melting. Calculations of the band structures and four-point resistivity measurements showed that AuSbTe is a semiconductor and Au1.9Sb0.46Te2.64 a metal. Various synthesis attempts confirmed the limited stable chemical composition of Au1.9Sb0.46Te2.64, identified successful methods to synthesize both compounds, and highlighted the challenges associated with single-crystal synthesis of AuSbTe.
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U2 - 10.1021/acs.inorgchem.4c04625
DO - 10.1021/acs.inorgchem.4c04625
M3 - Article
C2 - 39841906
AN - SCOPUS:85216416282
SN - 0020-1669
VL - 64
SP - 1613
EP - 1623
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 4
ER -