Zobrazeno 1 - 10
of 342
pro vyhledávání: '"Sacks, W."'
Recent angle-resolved photoemission electron spectroscopy (ARPES) experiments demonstrate that the momentum dependence of the spectral gap in underdoped cuprates does not follow a pure $d$-wave form [H. Anzai et a., Nat. Comm. {\bf 4}, 1815 (2013)].
Externí odkaz:
http://arxiv.org/abs/1907.04695
Autor:
Noat, Y., Cren, T., Dubost, V., Lange, S., Debontridder, F., Marcus, J., Toulemonde, P., Sacks, W., Roditchev, D.
We present the synthesis and the tunneling spectroscopy study of superconducting FeSe0.5Te0.5 (Tc = 14 K), SmFeAsO0.85 (Tc = 45 K) and SmFeAsO0.9F0.1 (Tc = 52 K). The samples were characterized by Rietveld refinement of X-ray diffraction patterns and
Externí odkaz:
http://arxiv.org/abs/1007.3151
We present local tunneling spectroscopy in the optimally electron-doped cuprate Sm2-xCexCuO4 x=0.15. A clear signature of the superconducting gap is observed with an amplitude ranging from place to place and from sample to sample (Delta~3.5-6meV). An
Externí odkaz:
http://arxiv.org/abs/0705.4217
We previously introduced [T. Cren et al., Europhys. Lett. 52, 203 (2000)] an energy-dependant gap function, $\Delta(E)$, that fits the unusual shape of the quasiparticle (QP) spectrum for both BiSrCaCuO and YBaCuO. A simple anti-resonance in $\Delta(
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607281
Autor:
Bergeal, N., Dubost, V., Noat, Y., Sacks, W., Roditchev, D., Emery, N., Herold, C., Mareche, J-F., Lagrange, P., Loupias, G.
We present scanning tunneling microscopy and spectroscopy of the newly discovered superconductor CaC$_6$. The tunneling conductance spectra, measured between 3 K and 15 K, show a clear superconducting gap in the quasiparticle density of states. The g
Externí odkaz:
http://arxiv.org/abs/cond-mat/0604208
Superconductivity is a rare example of a quantum system in which the wavefunction has a macroscopic quantum effect, due to the unique condensate of electron pairs. The amplitude of the wavefunction is directly related to the pair density, but both am
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602023
We address the question of probing the supercurrents in superconducting (SC) samples on a local scale by performing Scanning Tunneling Spectroscopy (STS) experiments with a SC tip. In this configuration, we show that the tunneling conductance is high
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511699
We report a simple method for the fabrication of Niobium superconducting (SC) tips for scanning tunnelling microscopy which allow atomic resolution. The tips, formed in-situ by the mechanical breaking of a niobium wire, reveal a clear SC gap of 1.5 m
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412095
Autor:
Kohen, A., Giubileo, F., Proslier, Th., Bobba, F., Noat, Y., Troianovski, A., Cucolo, A. M., Sacks, W., Klein, J., Roditchev, D., Zhigadlo, N., Kazakov, S. M., Karpinski, J.
Using Scanning Tunneling Microscope at low temperature we explore the superconducting phase diagram in the $\pi$-band of the two-band superconductor MgB$_2$. In this band the peculiar shape of the local tunneling spectra and their dynamics in the mag
Externí odkaz:
http://arxiv.org/abs/cond-mat/0403700
Autor:
Giubileo, F., Roditchev, D., Sacks, W., Lamy, R., Thanh, D. X., Klein, J., Miraglia, S., Fruchart, D., Marcus, J., Monod, Ph.
Publikováno v:
Physical Review Letters 87, 177008 (2001)
We report on the temperature dependence of the quasiparticle density of states (DOS) in the simple binary compound MgB2 directly measured using scanning tunneling microscope (STM). To achieve high quality tunneling conditions, a small crystal of MgB2
Externí odkaz:
http://arxiv.org/abs/cond-mat/0105592