Localization and Directionality of Surface Transport in Bi2Te3 Ordered 3D Nanonetworks

被引：3

作者：

Ruiz-Clavijo, Alejandra ^{[1
]}

Perez, Nicolas ^{[6
]}

Caballero-Calero, Olga ^{[1
]}

Blanco, Javier ^{[2
,3
]}

Peiro, Francesca ^{[2
,3
]}

Plana-Ruiz, Sergi ^{[2
,4
]}

Lopez-Haro, Miguel ^{[5
]}

Nielsch, Kornelius ^{[6
]}

Martin-Gonzalez, Marisol ^{[1
]}

机构：

[1] CSIC, Inst Micro & Nanotecnol, IMN CNM, CEI UAM CSIC Isaac Newton 8, E-28760 Tres Cantos, Madrid, Spain

[2] Univ Barcelona, Dept Elect & Biomed Engn, LENS MIND, Barcelona 08028, Spain

[3] Univ Barcelona, Inst Nanosci & Nanotechnol IN2UB, Barcelona 08028, Spain

[4] Univ Rovira i Virgili, Sci & Tech Resources, Tarragona 43007, Spain

[5] Univ Cadiz, Fac Ciencias, Dept Ciencia Mat Ingn Metalurg & Quim Inorgan, Cadiz 11510, Spain

[6] IFW Dresden, Inst Met Mat, D-01069 Dresden, Germany

来源：

ACS NANO | 2023年 / 17卷 / 17期

关键词：

metamaterials; bismuth telluride; 3D-AAO; nanonetwork; surface transport; localizationeffects; TOPOLOGICAL INSULATOR; THERMOELECTRIC TRANSPORT; THIN-FILMS; NANOWIRES; CONDUCTIVITY; ORIENTATION; SB2TE3; BI2SE3; STATE;

D O I：

10.1021/acsnano.3c04160

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The resistance of an ordered 3D-Bi2Te3 nanowirenanonetwork was studied at low temperatures. Below 50 K the increasein resistance was found to be compatible with the Anderson model forlocalization, considering that conduction takes place in individualparallel channels across the whole sample. Angle-dependent magnetoresistancemeasurements showed a distinctive weak antilocalization characteristicwith a double feature that we could associate with transport alongtwo perpendicular directions, dictated by the spatial arrangementof the nanowires. The coherence length obtained from the Hikami-Larkin-Nagaokamodel was about 700 nm across transversal nanowires, which correspondedto approximately 10 nanowire junctions. Along the individual nanowires,the coherence length was greatly reduced to about 100 nm. The observedlocalization effects could be the reason for the enhancement of theSeebeck coefficient observed in the 3D-Bi2Te3 nanowire nanonetwork compared to individual nanowires.

引用

页码：16960 / 16967

页数：8

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