61 citations · 151 across the 4 of their papers we have counts for
5 papers
Critical exponents and scaling invariance in the absence of a critical point
N. Saratz, D. A. Zanin, U. Ramsperger +3
The paramagnetic-to-ferromagnetic phase transition is believed to proceed through a critical point, at which power laws and scaling invariance, associated with the existence of one…
Scale invariance of a diodelike tunnel junction
H. Cabrera, D. A. Zanin, L. G. De Pietro +9
We measure the current vs voltage (I-V) characteristics of a diodelike tunnel junction consisting of a sharp metallic tip placed at a variable distance d from a planar collector an…
(Ir-)Reversibility and thermal equilibrium in magnetic domain pattern formation in ultra-thin ferromagnetic films
N. Saratz, U. Ramsperger, A. Vindigni +1
We investigate the details of pattern formation and transitions between different modulated phases in ultra-thin Fe films on Cu(001). At high temperature, the transitions between t…
Phase transition of the Si(111)-4x1-In surface reconstruction investigated by electron transport measurements
Takashi Uchihashi, Urs Ramsperger
We measure the electron conductivity of the surface states and the subsurface space charge layer originating from the Si(111)-4x1-In reconstruction as a function of temperature. Th…
Electron conduction through quasi-one-dimensional indium atomic wires on silicon
Takashi Uchihashi, Urs Ramsperger
Electron conduction through quasi-one-dimensional (1D) indium atomic wires on silicon (the Si(111)-4x1-In reconstruction) is clarified with the help of local structural analysis us…