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journal article·2023-09-12Open access

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

Alejandra Ruiz-Clavijo, Nicolás Pérez, Olga Caballero-Calero, Javier Blanco, Francesca Peiró, Sergi Plana-Ruiz, Miguel López-Haro, Kornelius Nielsch, Marisol Martín-González

ACS Nano· Volume 17· Issue 17
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Source abstract

Abstract

High Resolution Image Download MS PowerPoint Slide The resistance of an ordered 3D-Bi 2 Te 3 nanowire nanonetwork was studied at low temperatures. Below 50 K the increase in resistance was found to be compatible with the Anderson model for localization, considering that conduction takes place in individual parallel channels across the whole sample. Angle-dependent magnetoresistance measurements showed a distinctive weak antilocalization characteristic with a double feature that we could associate with transport along two perpendicular directions, dictated by the spatial arrangement of the nanowires. The coherence length obtained from the Hikami–Larkin–Nagaoka model was about 700 nm across transversal nanowires, which corresponded to approximately 10 nanowire junctions. Along the individual nanowires, the coherence length was greatly reduced to about 100 nm. The observed localization effects could be the reason for the enhancement of the Seebeck coefficient observed in the 3D-Bi 2 Te 3 nanowire nanonetwork compared to individual nanowires.
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Research context

Nanomaterials

OpenAlex topics: Topological Materials and Phenomena · Quantum and electron transport phenomena · Advanced Thermoelectric Materials and Devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM+CSIC) Isaac Newton 8, E-28760, Tres Cantos, Madrid, Spain

Institute for Metallic Materials, IFW-Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany

LENS-MIND, Department of Electronics and Biomedical Engineering, Universitat de Barcelona, 08028 Barcelona, Spain

Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain

Scientific & Technical Resources, Universitat Rovira i Virgili, 43007 Tarragona, Spain

Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Cádiz 11510, Spain

Funding

Consejo Superior de Investigaciones Cient?ficas · Ministerio de Ciencia e Innovaci?n · European Regional Development Fund · Consejer?a de Econom?a, Conocimiento, Empresas y Universidad, Junta de Andaluc?a · H2020 European Research Council

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