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  Out-of-Plane Transport of 1T-TaS2/Graphene-Based van der Waals Heterostructures

Boix-Constant, C., Mañas-Valero, S., Córdoba, R., Baldoví, J. J., Rubio, A., & Coronado, E. (2021). Out-of-Plane Transport of 1T-TaS2/Graphene-Based van der Waals Heterostructures. ACS Nano, 15(7), 11898-11907. doi:10.1021/acsnano.1c03012.

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Supporting information. - Optical contrast of 1T-TaS2 on SiO2/Si substrates, comparative of in-plane vs. out-of-plane devices, geometrical factors, Arrhenius and hopping analysis of the transport data, supplementary transport measurements for all the different measured van der Waals heterostructures and band structure calculations. This manuscript has been previously submitted to arXiv preprint server: Boix-Constant, C.; Mañas-Valero, S.; Córdoba, R.; Baldoví, J.J.; Rubio, Á.; Coronado, E. Out-of-Plane Transport of 1T-TaS2/Graphene-Based van der Waals Heterostructures. 2021, 2009.14550v2. arXiv.https://arxiv.org/abs/2009.14550v2 (accessed 2021/4/2) (PDF)
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https://dx.doi.org/10.1021/acsnano.1c03012 (Verlagsversion)
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 Urheber:
Boix-Constant, C.1, Autor
Mañas-Valero, S.1, Autor
Córdoba, R.1, Autor
Baldoví, J. J.1, Autor
Rubio, A.2, 3, 4, Autor           
Coronado, E.1, Autor
Affiliations:
1Instituto de Ciencia Molecular (ICMol), Universitat de València, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Center for Free-Electron Laser Science, ou_persistent22              
4Nano-Bio Spectroscopy Group, Departamento de Física de Materiales, Universidad del País Vasco, ou_persistent22              

Inhalt

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Schlagwörter: Layers, Two dimensional materials, Quantum mechanics, Electrical conductivity, Heterostructures
 Zusammenfassung: Due to their anisotropy, layered materials are excellent candidates for studying the interplay between the in-plane and out-of-plane entanglement in strongly correlated systems. A relevant example is provided by 1T-TaS2, which exhibits a multifaceted electronic and magnetic scenario due to the existence of several charge density wave (CDW) configurations. It includes quantum hidden phases, superconductivity and exotic quantum spin liquid (QSL) states, which are highly dependent on the out-of-plane stacking of the CDW. In this system, the interlayer stacking of the CDW is crucial for interpreting the underlying electronic and magnetic phase diagram. Here, atomically thin-layers of 1T-TaS2 are integrated in vertical van der Waals heterostructures based on few-layers graphene contacts and their electrical transport properties are measured. Different activation energies in the conductance and a gap at the Fermi level are clearly observed. Our experimental findings are supported by fully self-consistent DFT+U calculations, which evidence the presence of an energy gap in the few-layer limit, not necessarily coming from the formation of out-of-plane spin-paired bilayers at low temperatures, as previously proposed for the bulk. These results highlight dimensionality as a key effect for understanding quantum materials as 1T-TaS2, enabling the possible experimental realization of low-dimensional QSLs.

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Sprache(n): eng - English
 Datum: 2021-04-092021-07-012021-07-062021-07-27
 Publikationsstatus: Erschienen
 Seiten: 10
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1021/acsnano.1c03012
arXiv: 2009.14550
 Art des Abschluß: -

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Projektname : We acknowledge the financial support from the European Union (ERC AdG Mol-2D 788222 and ERC-2015-AdG-694097), the Spanish MICINN (MAT2017-89993-R cofinanced by FEDER and Excellence Unit “María de Maeztu”, CEX2019-000919-M), the Generalitat Valenciana (Prometeo program and PO FEDER Program, ref IDIFEDER/2018/061 and IDIFEDER/2020/063), the Basque government (Grupos Consolidados, IT1249-19) and the Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy - Cluster of Excellence Advanced Imaging of Matter (AIM) EXC 2056-390715994 and funding by the Deutsche Forschungsgemeinschaft (DFG) under RTG 1995 and GRK 2247. Support by the Max Planck Institute - New York City Center for Non-Equilibrium Quantum Phenomena is acknowledged. R.C. acknowledges the support of a fellowship from “la Caixa” Foundation (ID 100010434). The fellowship code is LCF/BQ/PR19/11700008. J.J.B. thanks support from the Plan Gent of Excellence of the Generalitat Valenciana (CDEIGENT/2019/022). C.B.-C. thanks the Generalitat Valencia for a PhD fellowship.
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Quelle 1

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Titel: ACS Nano
  Andere : ACS Nano
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Washington, DC : American Chemical Society
Seiten: - Band / Heft: 15 (7) Artikelnummer: - Start- / Endseite: 11898 - 11907 Identifikator: ISSN: 1936-0851
CoNE: https://pure.mpg.de/cone/journals/resource/1936-0851