210 citations · 615 across the 20 of their papers we have counts for
20 papers
Microwave photon-assisted phase-incoherent Cooper-pair tunneling in a Josephson STM
A. Roychowdhury, M. Dreyer, J. R. Anderson +2
We have observed photon-assisted Cooper-pair tunneling in an atomic-scale Josephson junction formed between a superconducting Nb tip and a superconducting Nb sample in a scanning t…
Plasma etching of superconducting Niobium tips for scanning tunneling microscopy
A. Roychowdhury, R. Dana, M. Dreyer +3
We report a reproducible technique for the fabrication of sharp superconducting Nb tips for scanning tunneling microscopy (STM) and scanning tunneling spectroscopy. Sections of Nb…
A 30 mK, 13.5 T scanning tunneling microscope with two independent tips
A. Roychowdhury, M. A. Gubrud, R. Dana +4
We describe the design, construction, and performance of an ultra-low temperature, high-field scanning tunneling microscope (STM) with two independent tips. The STM is mounted on a…
Spinodal Decomposition of Magnetic Ions in Eu-Codoped Ge/1-x/Cr/x/Te
A. Podgórni, L. Kilanski, W. Dobrowolski +9
We present the experimental evidence for the presence of spinodal decomposition of the magnetic ions in the Ge/1-x-y/Cr/x/Eu/y/Te samples with chemical composition varying in the r…
Magnetic Interactions in Ge/1-x/Cr/x/Te Semimagnetic Semiconductors
L. Kilanski, A. Podgórni, W. Dobrowolski +10
We present the studies of magnetic properties of Ge/1-x/Cr/x/Te diluted magnetic semiconductor with changeable chemical composition 0.016 \leq x \leq 0.061. A spin-glass state (at…
Thin-film superconducting resonator tunable to the ground-state hyperfine splitting of Rb
Z. Kim, C. P. Vlahacos, J. E. Hoffman +13
We describe a thin-film superconducting Nb microwave resonator, tunable to within 0.3 ppm of the hyperfine splitting of Rb at GHz. We coarsely tuned the re…