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

large-area functionalization

monolayer TMD

transition metal dichalcogenide

self-assembly

NbSe2

Författare

Francesco Calavalle

CIC nanoGUNE

Paul Dreher

Donostia International Physics Center

Ananthu Pullukattuthara Surendran

Chalmers, Mikroteknologi och nanovetenskap (MC2), 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

CSIC-UPV - Centro de Fisica de Materiales (CFM)

Donostia International Physics Center

Thilo Bauch

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Fèlix Casanova

CIC nanoGUNE

Basque Foundation for Science (Ikerbasque)

Marco Vittorio Nardi

Istituto dei Materiali per l'Elettronica ed il Magnetismo

Miguel M. Ugeda

Basque Foundation for Science (Ikerbasque)

Donostia International Physics Center

CSIC-UPV - Centro de Fisica de Materiales (CFM)

Luis E. Hueso

Basque Foundation for Science (Ikerbasque)

CIC nanoGUNE

Marco Gobbi

CSIC-UPV - Centro de Fisica de Materiales (CFM)

Basque Foundation for Science (Ikerbasque)

CIC nanoGUNE

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 21 1 136-143

Ämneskategorier

Fysikalisk kemi

Annan kemi

Den kondenserade materiens fysik

DOI

10.1021/acs.nanolett.0c03386

PubMed

33274947

Mer information

Senast uppdaterat

2021-02-01