Ultrathin septuple layered PbBi2Se4 nanosheets

被引：25

作者：

Chatterjee, Arindom

Guin, Satya N.

Biswas, Kanishka ^{[1
]}

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, New Chem Unit, Bangalore 560064, Karnataka, India

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 28期

关键词：

ENHANCED THERMOELECTRIC PROPERTIES; TOPOLOGICAL-INSULATOR; BI2TE3; NANOSTRUCTURES; THICKNESS; BI2SE3; PHASE;

D O I：

10.1039/c4cp01885k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Layered lead bismuth selenide, PbBi2Se4, an intergrowth compound of PbSe (rocksalt) and Bi2Se3 (hexagonal), is a topological insulator in the bulk phase. We present a simple solution based synthesis of two dimensional (2D) few seven atomic (septuple) layered PbBi2Se4 nanosheets (4-7 nm thick) for the first time. The excellent electrical transport in ultrathin PbBi2Se4 is attributed to the presence of dominant surface states that offer high electrical mobility (similar to 153 cm(2) V-1 s(-1)) and scattering resistant carriers. Ultrathin 3-5 SLs PbBi2Se4 shows an n-type semiconducting behaviour with a band gap of similar to 0.6 eV, which is confirmed by optical spectroscopy and thermopower measurements.

引用

收藏

页码：14635 / 14639

页数：5

相关论文

共 28 条

[1] Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3 [J].

Chen, Y. L. ;

Analytis, J. G. ;

Chu, J. -H. ;

Liu, Z. K. ;

Mo, S. -K. ;

Qi, X. L. ;

Zhang, H. J. ;

Lu, D. H. ;

Dai, X. ;

Fang, Z. ;

Zhang, S. C. ;

Fisher, I. R. ;

Hussain, Z. ;

Shen, Z. -X. .

SCIENCE, 2009, 325 (5937) :178-181

[2] Ultrathin Topological Insulator Bi2Se3 Nanoribbons Exfoliated by Atomic Force Microscopy [J].

Hong, Seung Sae ;

Kundhikanjana, Worasom ;

Cha, Judy J. ;

Lai, Keji ;

Kong, Desheng ;

Meister, Stefan ;

Kelly, Michael A. ;

Shen, Zhi-Xun ;

Cui, Yi .

NANO LETTERS, 2010, 10 (08) :3118-3122

[3] A topological Dirac insulator in a quantum spin Hall phase [J].

Hsieh, D. ;

Qian, D. ;

Wray, L. ;

Xia, Y. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

NATURE, 2008, 452 (7190) :970-U5

[4] Ionothermal Synthesis of Few-Layer Nanostructures of Bi2Se3 and Related Materials [J].

Jana, Manoj K. ;

Biswas, Kanishka ;

Rao, C. N. R. .

CHEMISTRY-A EUROPEAN JOURNAL, 2013, 19 (28) :9110-9113

[5] Candidates for topological insulators: Pb-based chalcogenide series [J].

Jin, Hosub ;

Song, Jung-Hwan ;

Freeman, Arthur J. ;

Kanatzidis, Mercouri G. .

PHYSICAL REVIEW B, 2011, 83 (04)

[6] Structural evolution and phase homologies for "design" and prediction of solid-state compounds [J].

Kanatzidis, MG .

ACCOUNTS OF CHEMICAL RESEARCH, 2005, 38 (04) :359-368

[7]

Kong DS, 2011, NAT CHEM, V3, P845, DOI [10.1038/nchem.1171, 10.1038/NCHEM.1171]

[8] Controlled Synthesis of Topological Insulator Nanoplate Arrays on Mica [J].

Li, Hui ;

Cao, Jie ;

Zheng, Wenshan ;

Chen, Yulin ;

Wu, Di ;

Dang, Wenhui ;

Wang, Kai ;

Peng, Hailin ;

Liu, Zhongfan .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (14) :6132-6135

[9] Intrinsic Topological Insulator Bi2Te3 Thin Films on Si and Their Thickness Limit [J].

Li, Yao-Yi ;

Wang, Guang ;

Zhu, Xie-Gang ;

Liu, Min-Hao ;

Ye, Cun ;

Chen, Xi ;

Wang, Ya-Yu ;

He, Ke ;

Wang, Li-Li ;

Ma, Xu-Cun ;

Zhang, Hai-Jun ;

Dai, Xi ;

Fang, Zhong ;

Xie, Xin-Cheng ;

Liu, Ying ;

Qi, Xiao-Liang ;

Jia, Jin-Feng ;

Zhang, Shou-Cheng ;

Xue, Qi-Kun .

ADVANCED MATERIALS, 2010, 22 (36) :4002-4007

[10] Surfactant-Free Scalable Synthesis of Bi2Te3 and Bi2Se3 Nanoflakes and Enhanced Thermoelectric Properties of Their Nanocomposites [J].

Min, Yuho ;

Roh, Jong Wook ;

Yang, Heeseung ;

Park, Minwoo ;

Kim, Sang Il ;

Hwang, Sungwoo ;

Lee, Sang Mock ;

Lee, Kyu Hyoung ;

Jeong, Unyong .

ADVANCED MATERIALS, 2013, 25 (10) :1425-1429