TY - JOUR
T1 - Enhanced superconductivity in atomically thin TaS 2
AU - Navarro-Moratalla, Efrén
AU - Island, Joshua O.
AU - Manãs-Valero, Samuel
AU - Pinilla-Cienfuegos, Elena
AU - Castellanos-Gomez, Andres
AU - Quereda, Jorge
AU - Rubio-Bollinger, Gabino
AU - Chirolli, Luca
AU - Silva-Guillén, Jose Angel
AU - Agraït, Nicolás
AU - Steele, Gary A.
AU - Guinea, Francisco
AU - Van Der Zant, Herre S J
AU - Coronado, Eugenio
PY - 2016/3/17
Y1 - 2016/3/17
N2 - The ability to exfoliate layered materials down to the single layer limit has presented the opportunity to understand how a gradual reduction in dimensionality affects the properties of bulk materials. Here we use this top-down approach to address the problem of superconductivity in the two-dimensional limit. The transport properties of electronic devices based on 2H tantalum disulfide flakes of different thicknesses are presented. We observe that superconductivity persists down to the thinnest layer investigated (3.5 nm), and interestingly, we find a pronounced enhancement in the critical temperature from 0.5 to 2.2 K as the layers are thinned down. In addition, we propose a tight-binding model, which allows us to attribute this phenomenon to an enhancement of the effective electron-phonon coupling constant. This work provides evidence that reducing the dimensionality can strengthen superconductivity as opposed to the weakening effect that has been reported in other 2D materials so far.
AB - The ability to exfoliate layered materials down to the single layer limit has presented the opportunity to understand how a gradual reduction in dimensionality affects the properties of bulk materials. Here we use this top-down approach to address the problem of superconductivity in the two-dimensional limit. The transport properties of electronic devices based on 2H tantalum disulfide flakes of different thicknesses are presented. We observe that superconductivity persists down to the thinnest layer investigated (3.5 nm), and interestingly, we find a pronounced enhancement in the critical temperature from 0.5 to 2.2 K as the layers are thinned down. In addition, we propose a tight-binding model, which allows us to attribute this phenomenon to an enhancement of the effective electron-phonon coupling constant. This work provides evidence that reducing the dimensionality can strengthen superconductivity as opposed to the weakening effect that has been reported in other 2D materials so far.
UR - http://resolver.tudelft.nl/uuid:7b5aa421-5f02-4402-a7f1-580b843ed865
UR - http://www.scopus.com/inward/record.url?scp=84961827878&partnerID=8YFLogxK
U2 - 10.1038/ncomms11043
DO - 10.1038/ncomms11043
M3 - Article
AN - SCOPUS:84961827878
SN - 2041-1723
VL - 7
SP - 1
EP - 7
JO - Nature Communications
JF - Nature Communications
M1 - 11043
ER -