title: Intrinsic topological insulator Bi(1.5)Sb(0.5)Te(3-x)Se(x) thin crystals.
abstract: The quaternary topological insulator (Bi,Sb)2(Te,Se)3 has demonstrated topological surface states with an insulating bulk. Scientists have identified an optimized composition of Bi(1.5)Sb(0.5)Te(1.7)Se(1.3) with the highest resistivity reported. But the physics that drive to this composition remains unclear. Here we report the crystal structure and the magneto-transport properties of Bi(1.5)Sb(0.5)Te(3-x)Se(x) (BSTS) series. A correlation between the structure and the physical properties has been revealed. We found out that within the rhombohedral structure, the composition with most Te substituting Se has the highest resistivity. On the other hand, segregation of other composition phases will introduce much higher bulk concentration.
authors.affiliation: National Laboratory of Solid State Microstructures, Center of Photovoltaic Engineering and School of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: National Laboratory of Solid State Microstructures, Center of Photovoltaic Engineering and School of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: 1] National Laboratory of Solid State Microstructures, Center of Photovoltaic Engineering and School of Physics, Nanjing University, Nanjing 210093, China [2] Department of Electrical Engineering, University of California, Los Angeles, CA, 90095, USA.
authors.forename: Wenqin
authors.initials: W
authors.lastname: Zou
authors.affiliation: 1] School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China [2] Department of Electrical Engineering, University of California, Los Angeles, CA, 90095, USA.
authors.forename: Liang
authors.initials: L
authors.lastname: He
authors.affiliation: National Laboratory of Solid State Microstructures, Center of Photovoltaic Engineering and School of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Fengqi
authors.initials: F
authors.lastname: Song
authors.affiliation: School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Zhang
authors.affiliation: National Laboratory of Solid State Microstructures, Center of Photovoltaic Engineering and School of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Xiaoshan
authors.initials: X
authors.lastname: Wu
authors.affiliation: National Laboratory of Solid State Microstructures, Center of Photovoltaic Engineering and School of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Fengming
authors.initials: F
authors.lastname: Zhang