238 citations · 507 across the 9 of their papers we have counts for
9 papers
Quantum oscillations in metallic Sb2Te2Se topological insulator
K. Shrestha, V. Marinova, D. Graf +2
We have studied the magnetotransport properties of the metallic, p-type Sb2Te2Se which is a topological insulator. Magnetoresistance shows Shubnikov de Haas oscillations in fields…
Effect of heavy-ion irradiation on London penetration depth in over-doped Ba(Fe,Co)2As2
J. Murphy, M. A. Tanatar, Hyunsoo Kim +7
Irradiation with 1.4 GeV Pb ions was used to induce artificial disorder in single crystals of iron-arsenide superconductor Ba(FeCo)As and to study its e…
Infrared Vortex-State Electrodynamics in Type-II Superconducting Thin Films
Xiaoxiang Xi, J. -H. Park, D. Graf +2
The vortex-state electrodynamics of s-wave superconductors has been studied by infrared spectroscopy. Far-infrared transmission and reflection spectra of superconducting NbTiN and…
Direct measurement of the upper critical field in a cuprate superconductor
G. Grissonnanche, O. Cyr-Choiniere, F. Laliberte +20
The upper critical field Hc2 is a fundamental measure of the pairing strength, yet there is no agreement on its magnitude and doping dependence in cuprate superconductors. We have…
Angular-dependent upper critical field of overdoped Ba(FeNi)As
J. Murphy, M. A. Tanatar, D. Graf +5
In-plane resistivity measurements as a function of temperature, magnetic field and its orientation with respect to the crystallographic plane were used to study the upper crit…
Physical properties of KxNi2-ySe2 single crystals
Hechang Lei, Kefeng Wang, Hyejin Ryu +3
We have synthesized K0.95(1)Ni1.86(2)Se2 single crystals. The single crystals contain K and Ni deficiencies not observed in KNi2Se2 polycrystals. Unlike KNi2Se2 polycrystals, the s…
Quantum transport of two-dimensional Dirac fermions in SrMnBi2
Kefeng Wang, D. Graf, Hechang Lei +2
We report two-dimensional quantum transport in SrMnBi single crystals. The linear energy dispersion leads to the unusual nonsaturated linear magnetoresistance since all Dirac f…
High resolution miniature dilatometer based on AFM piezocantilever
J. -H. Park, D. Graf, T. P. Murphy +2
Thermal expansion, or dilation, is closely related to the specific heat, and provides useful information regarding material properties. The accurate measurement of dilation in conf…
Shubnikov-de Haas effect and Yamaji oscillations in the antiferromagnetically ordered organic superconductor k-(BETS)2FeBr4: A Fermiology study
L. Balicas, J. S. Brooks, K. Storr +8
Shubnikov-De Haas effect (SdH) effect and angular dependent magnetoresistance oscillations (AMRO) were observed in the organic superconductor: -(BETS)FeBr. In contrast t…