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Title: Two-Dimensional Mineral [Pb 2 BiS 3 ][AuTe 2 ]: High-Mobility Charge Carriers in Single-Atom-Thick Layers

Abstract

Two-dimensional (2D) electronic systems are of wide interest due to their richness in chemical and physical phenomena and potential for technological applications. Here we report that [Pb2BiS3][AuTe2], known as the naturally occurring mineral buckhornite, hosts 2D carriers in single-atom-thick layers. The structure is composed of stacking layers of weakly coupled [Pb2BiS3] and [AuTe2] sheets. The insulating [Pb2BiS3] sheet inhibits interlayer charge hopping and confines the carriers in the basal plane of the single-atom-thick [AuTe2] layer. Magneto-transport measurements on synthesized samples and theoretical calculations show that [Pb2BiS3][AuTe2] is a multiband semimetal with a compensated density of electrons and holes, which exhibits a high hole carrier mobility of similar to 1360 cm(2)/(V s). This material possesses an extremely large anisotropy, G = rho(c)/rho(ab) approximate to 10(4), comparable to those of the benchmark 2D materials graphite and Bi2Sr2CaCu2O6+delta. The electronic structure features linear band dispersion at the Fermi level and ultrahigh Fermi velocities of 10(6) m/s, which are virtually identical to those of graphene. The weak interlayer coupling gives rise to the highly cleavable property of the single crystal specimens. Our results provide a novel candidate for a monolayer platform to investigate emerging electronic properties.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1356621
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the American Chemical Society; Journal Volume: 137; Journal Issue: 6
Country of Publication:
United States
Language:
English

Citation Formats

Fang, Lei, Im, Jino, Stoumpos, Constantinos C., Shi, Fengyuan, Dravid, Vinayak, Leroux, Maxime, Freeman, Arthur J., Kwok, Wai-Kwong, Chung, Duck Young, and Kanatzidis, Mercouri. Two-Dimensional Mineral [Pb 2 BiS 3 ][AuTe 2 ]: High-Mobility Charge Carriers in Single-Atom-Thick Layers. United States: N. p., 2015. Web. doi:10.1021/ja5111688.
Fang, Lei, Im, Jino, Stoumpos, Constantinos C., Shi, Fengyuan, Dravid, Vinayak, Leroux, Maxime, Freeman, Arthur J., Kwok, Wai-Kwong, Chung, Duck Young, & Kanatzidis, Mercouri. Two-Dimensional Mineral [Pb 2 BiS 3 ][AuTe 2 ]: High-Mobility Charge Carriers in Single-Atom-Thick Layers. United States. doi:10.1021/ja5111688.
Fang, Lei, Im, Jino, Stoumpos, Constantinos C., Shi, Fengyuan, Dravid, Vinayak, Leroux, Maxime, Freeman, Arthur J., Kwok, Wai-Kwong, Chung, Duck Young, and Kanatzidis, Mercouri. Wed . "Two-Dimensional Mineral [Pb 2 BiS 3 ][AuTe 2 ]: High-Mobility Charge Carriers in Single-Atom-Thick Layers". United States. doi:10.1021/ja5111688.
@article{osti_1356621,
title = {Two-Dimensional Mineral [Pb 2 BiS 3 ][AuTe 2 ]: High-Mobility Charge Carriers in Single-Atom-Thick Layers},
author = {Fang, Lei and Im, Jino and Stoumpos, Constantinos C. and Shi, Fengyuan and Dravid, Vinayak and Leroux, Maxime and Freeman, Arthur J. and Kwok, Wai-Kwong and Chung, Duck Young and Kanatzidis, Mercouri},
abstractNote = {Two-dimensional (2D) electronic systems are of wide interest due to their richness in chemical and physical phenomena and potential for technological applications. Here we report that [Pb2BiS3][AuTe2], known as the naturally occurring mineral buckhornite, hosts 2D carriers in single-atom-thick layers. The structure is composed of stacking layers of weakly coupled [Pb2BiS3] and [AuTe2] sheets. The insulating [Pb2BiS3] sheet inhibits interlayer charge hopping and confines the carriers in the basal plane of the single-atom-thick [AuTe2] layer. Magneto-transport measurements on synthesized samples and theoretical calculations show that [Pb2BiS3][AuTe2] is a multiband semimetal with a compensated density of electrons and holes, which exhibits a high hole carrier mobility of similar to 1360 cm(2)/(V s). This material possesses an extremely large anisotropy, G = rho(c)/rho(ab) approximate to 10(4), comparable to those of the benchmark 2D materials graphite and Bi2Sr2CaCu2O6+delta. The electronic structure features linear band dispersion at the Fermi level and ultrahigh Fermi velocities of 10(6) m/s, which are virtually identical to those of graphene. The weak interlayer coupling gives rise to the highly cleavable property of the single crystal specimens. Our results provide a novel candidate for a monolayer platform to investigate emerging electronic properties.},
doi = {10.1021/ja5111688},
journal = {Journal of the American Chemical Society},
number = 6,
volume = 137,
place = {United States},
year = {Wed Feb 18 00:00:00 EST 2015},
month = {Wed Feb 18 00:00:00 EST 2015}
}