Superconducting density of states and vortex cores of 2H-NbS2

Abstract

Scanning tunneling microscopy and spectroscopy (STM/S) measurements in the superconducting dichalcogenide 2H-NbS2 show a peculiar superconducting density of states with two well defined features at 0.97 meV and 0.53 meV, located respectively above and below the value for the superconducting gap expected from single band s-wave BCS model (D=1.76kBTc=0.9 meV). Both features have a continuous temperature evolution and disappear at Tc = 5.7 K. Moreover, we observe the hexagonal vortex lattice with radially symmetric vortices and a well developed localized state at the vortex cores. The sixfold star shape characteristic of the vortex lattice of the compound 2H-NbSe2 is, together with the charge density wave order (CDW), absent in 2H-NbS2.

5 pages, 4 figures

References in corpus (7)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Vortex Imaging in the pi-Band of Magnesium Diboride
• Penetration depth study of superconducting gap structure of 2\textit{H}-NbSe${}_2$
• Intrinsic atomic scale modulations of the superconducting gap of 2H-NbSe2
• Scanning Tunneling Spectroscopy on the novel superconductor CaC6
• Scanning tunneling spectroscopy with superconducting tips of Al
• Ubiquitous V-shape density of states in mixed state of clean limit type II superconductors; STM experiment and theory

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