Large single crystal growth, transport property, and spectroscopic characterizations of three-dimensional Dirac semimetal Cd3As2.
The three dimensional (3D) Dirac semimetal is a new quantum state of matter that has attracted much attention recently in physics and material science. Here, we report on the growth of large plate-like single crystals of Cd3As2 in two major orientations by a self-selecting vapor growth (SSVG) method, and the optimum growth conditions have been experimentally determined. The crystalline imperfections and electrical properties of the crystals were examined with transmission electron microscopy (TEM), scanning tunneling microscopy (STM), and transport property measurements. This SSVG method makes it possible to control the as-grown crystal compositions with excess Cd or As leading to mobilities near 5-10(5) cm(2)V(-1)s(-1). Zn-doping can effectively reduce the carrier density to reach the maximum residual resistivity ratio (RRRρ300K/ρ5K) of 7.6. A vacuum-cleaved single crystal has been investigated using angle-resolved photoemission spectroscopy (ARPES) to reveal a single Dirac cone near the center of the surface Brillouin zone with a binding energy of approximately 200 meV.
1] Institute of Physics, Academia Sinica, Taipei 11529, Taiwan [2] Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
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R
Sankar
Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
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M
Neupane
Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
S-Y
SY
Xu
Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
C J
CJ
Butler
Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
I
I
Zeljkovic
Institute of Physics, Academia Sinica, Taipei 11529, Taiwan.
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I
Panneer Muthuselvam
Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
F-T
FT
Huang
Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
S-T
ST
Guo
Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
Sunil K
SK
Karna
Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
M-W
MW
Chu
Institute of Physics, Academia Sinica, Taipei 11529, Taiwan.
W L
WL
Lee
1] Department of Physics, National Taiwan University, Taipei 10617, Taiwan [2] Institute of Atomic and molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.
M-T
MT
Lin
Anna University, Crystal Growth Centre, Chennai 600025, India.
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R
Jayavel
Department of Physics and FrederickSeitz Materials Research Laboratory, University of Illinois Urbana-Champaign, 61801, USA.
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V
Madhavan
1] Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, New Jersey 08544, USA [2] Princeton Center for Complex Materials, Princeton University, Princeton, New Jersey 08544, USA.
M Z
MZ
Hasan
1] Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan [2] National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan [3] Taiwan Consortium of Emergent Crystalline Materials, Ministry of Science and Technology, Taipei 10622, Taiwan.
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Chou