Tailoring Superconductivity in Large-Area Single-Layer NbSe2 via Self-Assembled Molecular Adlayers
Artikel i vetenskaplig tidskrift, 2021
Two-dimensional transition metal dichalcogenides (TMDs) represent an ideal testbench for the search of materials by design, because their optoelectronic properties can be manipulated through surface engineering and molecular functionalization. However, the impact of molecules on intrinsic physical properties of TMDs, such as superconductivity, remains largely unexplored. In this work, the critical temperature (TC) of large-area NbSe2 monolayers is manipulated, employing ultrathin molecular adlayers. Spectroscopic evidence indicates that aligned molecular dipoles within the self-assembled layers act as a fixed gate terminal, collectively generating a macroscopic electrostatic field on NbSe2. This results in an ∼55% increase and a 70% decrease in TC depending on the electric field polarity, which is controlled via molecular selection. The reported functionalization, which improves the air stability of NbSe2, is efficient, practical, up-scalable, and suited to functionalize large-area TMDs. Our results indicate the potential of hybrid 2D materials as a novel platform for tunable superconductivity.
tunable superconductivity
self-assembly
monolayer TMD
transition metal dichalcogenide
large-area functionalization
NbSe2
Författare
Francesco Calavalle
CIC nanoGUNE
Paul Dreher
Donostia International Physics Center
Ananthu Pullukattuthara Surendran
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Wen Wan
Donostia International Physics Center
Melanie Timpel
Istituto dei Materiali per l'Elettronica ed il Magnetismo
Roberto Verucchi
Istituto dei Materiali per l'Elettronica ed il Magnetismo
Celia Rogero
Donostia International Physics Center
Consejo Superior de Investigaciones Científicas (CSIC)
Thilo Bauch
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Floriana Lombardi
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Fèlix Casanova
Basque Foundation for Science (Ikerbasque)
CIC nanoGUNE
Marco Vittorio Nardi
Istituto dei Materiali per l'Elettronica ed il Magnetismo
Miguel M. Ugeda
Consejo Superior de Investigaciones Científicas (CSIC)
Donostia International Physics Center
Basque Foundation for Science (Ikerbasque)
Luis E. Hueso
CIC nanoGUNE
Basque Foundation for Science (Ikerbasque)
Marco Gobbi
Basque Foundation for Science (Ikerbasque)
CIC nanoGUNE
Consejo Superior de Investigaciones Científicas (CSIC)
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 21 1 136-143Ämneskategorier (SSIF 2011)
Fysikalisk kemi
Annan kemi
Den kondenserade materiens fysik
DOI
10.1021/acs.nanolett.0c03386
PubMed
33274947