Publications (9)
Role of pair-breaking and phase fluctuations in c-axis tunneling in underdoped BiSrCaCuO
C. J. van der Beek, P. Spathis, S. Colson +4
The Josephson Plasma Resonance is used to study the c-axis supercurrent in the superconducting state of underdoped BiSrCaCuO with varying degrees of cont…
Nernst effect as a probe of superconducting fluctuations in disordered thin films
A. Pourret, P. Spathis, H. Aubin +1
In amorphous superconducting thin films of and , a finite Nernst coefficient can be detected in a wide range of temperature and magnetic field. Due to t…
Quantum transport in GaN/AlN double-barrier heterostructure nanowires
R. Songmuang, G. Katsaros, E. Monroy +4
We investigate electronic transport in n-i-n GaN nanowires with and without AlN double barriers. The nanowires are grown by catalyst-free, plasma-assisted molecular beam epitaxy en…
A Josephson Quantum Electron Pump
F. Giazotto, P. Spathis, S. Roddaro +4
A macroscopic fluid pump works according to the law of Newtonian mechanics and transfers a large number of molecules per cycle (of the order of 10^23). By contrast, a nano-scale ch…
Observation of spin-selective tunneling in SiGe nanocrystals
G. Katsaros, V. N. Golovach, P. Spathis +6
Spin-selective tunneling of holes in SiGe nanocrystals contacted by normal-metal leads is reported. The spin selectivity arises from an interplay of the orbital effect of the magne…
Cooling electrons from 1 K to 400 mK with V-based nanorefrigerators
O. Quaranta, P. Spathis, F. Beltram +1
The fabrication and operation of V-based superconducting nanorefrigerators is reported. Specifically, electrons in an Al island are cooled thanks to hot-quasiparticle extraction pr…