337 citations · 942 across the 19 of their papers we have counts for
19 papers
Fit-Free Optical Determination of Electronic Thermalization Time in Nematic Iron-Based Superconductors
Alexander Bartenev, Roman Kolodka, Ki-Tae Eom +6
We present a nematic response function model (NRFM) for fit-free direct extraction of the characteristic time of ultrafast electronic thermalization in iron-based superconductors,…
Direct imaging of a Berry curvature nematic state in a spin-compensated magnet
Weihang Lu, Camron Farhang, Yuchuan Yao +6
Density waves conventionally describe the periodic modulation of charge or spin, yet the spatial modulation of electronic geometry has remained elusive. Here, we report subtle micr…
Electrical Characterization of High-k (k>115) Crystalline SrTiO3 (STO) thin film integration with GaN with Nanomembrane Transfer Process
Md Tahmidul Alam, Kyoungjun Lee, Guangying Wang +2
High-k (115), crystalline SrTiO3 (STO) thin film was transferred on GaN for potential applications in power devices (transistor and diodes) by nanomembrane transfer method and the…
Unusual dependence on the angle of magnetic field for the spin Hall magnetoresistance of monodomain epitaxial BiFeO3 thin films
Yongjian Tang, Pratap Pal, Matthew Roddy +7
Spin Hall magnetoresistance (SMR) measurements provide a way to probe the surface spin structure of insulating magnetic materials. Such measurements produce resistance signals of t…
Temperature-invariant magneto-optical Kerr effect in a noncollinear antiferromagnet
Camron Farhang, Weihang Lu, Yuchuan Yao +6
Noncollinear antiferromagnets exhibit anomalous Hall and magneto-optical Kerr effects driven by Berry curvature despite negligible net magnetization, promising ultrafast spintronic…
Twisted oxide membrane interface by local atomic registry design
Min-Su Kim, Kyoungjun Lee, Ryo Ishikawa +9
Interplay of lattice, orbital, and charge degrees of freedom in complex oxide materials has hosted a plethora of exotic quantum phases and physical properties. Recent advances in s…
Unraveling Enhanced Superconductivity in Single-layer FeSe through Substrate Surface Terminations
Qiang Zou, Gi-Yeop Kim, Jong-Hoon Kang +7
Single-layer FeSe films grown on (001) SrTiO3 substrates have shown a significant increase in superconducting transition temperature compared to bulk FeSe. Several mechanisms have…
Engineered Chirality of One-Dimensional Nanowires
Megan Briggeman, Elliott Mansfield, Johannes Kombe +11
The origin and function of chirality in DNA, proteins, and other building blocks of life represent a central question in biology. Observations of spin polarization and magnetizatio…
Morphogenesis of Spin Cycloids in a Non-collinear Antiferromagnet
Shashank Kumar Ojha, Pratap Pal, Sergei Prokhorenko +11
Pattern formation in spin systems with continuous-rotational symmetry (CRS) provides a powerful platform to study emergent complex magnetic phases and topological defects in conden…
Strain-Driven Disproportionation at a Correlated Oxide Metal-Insulator Transition
T. H. Kim, T. R. Paudel, R. J. Green +10
Metal-to-insulator phase transitions in complex oxide thin films are exciting phenomena which may be useful for device applications, but in many cases the physical mechanism respon…
Observation of magnetic vortex pairs at room temperature in a planar α-Fe2O3/Co heterostructure
F. P. Chmiel, N. Waterfield Price, R. D. Johnson +8
Vortices are among the simplest topological structures, and occur whenever a flow field `whirls' around a one-dimensional core. They are ubiquitous to many branches of physics, fro…
Electrodynamics of superconducting pnictide superlattices
A. Perucchi, F. Capitani, P. Di Pietro +8
It has been recently reported (S. Lee et al., Nature Materials 12, 392, 2013) that superlattices where layers of the 8% Co-doped BaFe2As2 superconducting pnictide are intercalated…
Polarity control of carrier injection at ferroelectric/metal interfaces for electrically switchable diode and photovoltaic effects
Daesu Lee, S. H. Baek, T. H. Kim +4
We investigated a switchable ferroelectric diode effect and its physical mechanism in Pt/BiFeO3/SrRuO3 thin-film capacitors. Our results of electrical measurements support that, ne…
Phase-incoherent superconducting pairs in the normal state of Ba(FeCo)As
Goutam Sheet, Manan Mehta, D. A. Dikin +8
The normal state properties of the recently discovered ferropnictide superconductors might hold the key to understanding their exotic superconductivity. Using point-contact spectro…
Modification of intergrain connectivity, upper critical field anisotropy, and critical current density in ion irradiated MgB2 films
S. D. Kaushik, Ravi Kumar, P. K. Mishra +3
We study the effect of 100 MeV Silicon and 200 MeV Gold ion irradiation on the inter and intra grain properties of superconducting thin films of Magnesium Diboride. Substantial dec…
Measurements of Spin Polarization of Epitaxial SrRuO3 Thin Films
B. Nadgorny, M. S. Osofsky, D. J. Singh +5
We have measured the transport spin-polarization of epitaxial thin films of the conductive ferromagnetic oxide, SrRuO3, using Point Contact Andreev Reflection Spectroscopy (PCAR).…
Non-Fermi liquid behavior and scaling of low frequency suppression in optical conductivity spectra of CaRuO
Y. S. Lee, Jaejun Yu, J. S. Lee +4
Optical conductivity spectra of paramagnetic CaRuO are investigated at various temperatures. At T=10 K, it shows a non-Fermi liquid behavior of $σ_1(ω)\sim 1/ω^{\frac…
Synthesis and Properties of c-axis Oriented Epitaxial MgB2 Thin Films
S. D. Bu, D. M. Kim, J. H. Choi +10
We report the growth and properties of epitaxial MgB2 thin films on (0001) Al2O3 substrates. The MgB2 thin films were prepared by depositing boron films via RF magnetron sputtering…
Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB2 thin films
S. Patnaik, L. D. Cooley, A. Gurevich +16
An important predicted, but so far uncharacterized, property of the new superconductor MgB2 is electronic anisotropy arising from its layered crystal structure. Here we report on t…