305 citations · 1.3k across the 25 of their papers we have counts for
25 papers
Calorimetric evidence for two phase transitions in BaKFeAs with fermion pairing and quadrupling states
Ilya Shipulin, Nadia Stegani, Ilaria Maccari +9
Theoretically, materials that break multiple symmetries allow, under certain conditions, the formation of four-fermion condensates above the superconducting critical temperature. S…
The thermoelectric conversion efficiency problem: Insights from the electron gas thermodynamics close to a phase transition
I. Khomchenko, A. Ryzhov, F. Maculewicz +10
The bottleneck in modern thermoelectric power generation and cooling is the low energy conversion efficiency of thermoelectric materials. The detrimental effects of lattice phonons…
THz electrodynamics of BaFeNiAs film analyzed in the framework of multiband Eliashberg theory
G. A. Ummarino, A. V. Muratov, L. S. Kadyrov +5
The temperature dependences of the plasma frequency, superfluid density and London penetration depth were determined from terahertz spectra of conductivity and dielectric permittiv…
Yanson point-contact spectroscopy of Weyl semimetal WTe2
Yu. G. Naidyuk, D. L. Bashlakov, O. E. Kvitnitskaya +10
We carried out point contact (PC) investigation of WTe2 single crystals. We measured Yanson d2V/dI2 PC spectra of the electron-phonon interaction (EPI) in WTe2. The spectra demonst…
Universal scaling behavior of the upper critical field in strained FeSe0.7Te0.3 thin films
Feifei Yuan, Vadim Grinenko, Kazumasa Iida +12
Revealing the universal behaviors of iron-based superconductors (FBS) is important to elucidate the microscopic theory of superconductivity. In this work, we investigate the effect…
Emerging superconductivity with broken time reversal symmetry inside a superconducting -wave state
V. Grinenko, R. Sarkar, K. Kihou +17
In general, magnetism and superconductivity are antagonistic to each other. However, there are several families of superconductors, in which superconductivity may coexist with magn…
The superconducting gaps in FeSe studied by soft point-contact Andreev reflection spectroscopy
Yu. G. Naidyuk, O. E. Kvitnitskaya, N. V. Gamayunova +6
FeSe single crystals have been studied by soft point-contact Andreev-reflection spectroscopy. Superconducting gap features in the differential resistance dV/dI(V) of point contacts…
Reversible tuning of magnetocaloric Ni-Mn-Ga-Co films on ferroelectric PMN-PT substrates
Benjamin Schleicher, Robert Niemann, Stefan Schwabe +4
Tuning functional properties of thin caloric films by mechanical stress is currently of high interest. In particular, a controllable magnetisation or transition temperature is desi…
The influence of the in-plane lattice constant on the superconducting transition temperature of FeSe0.7Te0.3 thin films
Feifei Yuan, Kazumasa Iida, Vadim Grinenko +12
Epitaxial Fe(Se,Te) thin films were prepared by pulsed laser deposition on (La0.18Sr0.82)(Al0.59Ta0.41)O3 (LSAT), CaF2-buffered LSAT and bare CaF2 substrates, which exhibit an almo…
Selective mass enhancement close to the quantum critical point in BaFe(AsP)
V. Grinenko, K. Iida, F. Kurth +16
A quantum critical point (QCP) is currently being conjectured for the BaFe(AsP) system at the critical value 0.3. In the proximity of a QCP,…
Experimental signatures of the mixed axial-gravitational anomaly in the Weyl semimetal NbP
Johannes Gooth, Anna Corinna Niemann, Tobias Meng +12
Weyl semimetals are materials where electrons behave effectively as a kind of massless relativistic particles known asWeyl fermions. These particles occur in two flavours, or chira…
Superconducting properties of Ba(Fe1-xNix)2As2 thin films in high magnetic fields
Stefan Richter, Fritz Kurth, Kazumasa Iida +9
We report on electrical transport properties of epitaxial Ba(Fe1-xNix)2As2 thin films grown by pulsed laser deposition in static magnetic fields up to 35 T. The thin film shows a c…
Purely Antiferromagnetic Magnetoelectric Random Access Memory
Tobias Kosub, Martin Kopte, Ruben Hühne +8
Magnetic random access memory schemes employing magnetoelectric coupling to write binary information promise outstanding energy efficiency. We propose and demonstrate a purely anti…
Chiral magnetoresistance in the Weyl semimetal NbP
Anna Corinna Niemann, Johannes Gooth, Shu-Chun Wu +10
NbP is a recently realized Weyl semimetal (WSM), hosting Weyl points through which conduction and valence bands cross linearly in the bulk and exotic Fermi arcs appear. However, th…
Hall-plot of the phase diagram for Ba(Fe1-xCox)2As2
Kazumasa Iida, Vadim Grinenko, Fritz Kurth +16
The Hall effect is a powerful tool for investigating carrier type and density. For single-band materials, the Hall coefficient is traditionally expressed simply by …
Interface control by homoepitaxial growth in pulsed laser deposited iron chalcogenide thin ilms
Sebastian Molatta, Silvia Haindl, Sascha Trommler +3
Thin film growth of iron chalcogenides by pulsed laser deposition (PLD) is still a delicate issue in terms of simultaneous control of stoichiometry, texture, substrate/film interfa…
Strain induced superconductivity in the parent compound BaFe2As2
J. Engelmann, V. Grinenko, P. Chekhonin +10
The discovery of superconductivity (SC) with a transition temperature, Tc, up to 65K in single-layer FeSe (bulk Tc =8K) films grown on SrTiO3 substrates has attracted special atten…
The Effect of 45° Grain Boundaries and associated Fe particles on Jc and resistivity in Ba(Fe0.9Co0.1)2As2 Thin Films
J. Hänisch, K. Iida, F. Kurth +6
The anisotropy of the critical current density Jc depends in general on both the properties of the flux lines (such as line tension, coherence length and penetration depth) and the…
Thickness dependence of structural and transport properties of Co-doped BaFe2As2 on Fe buffered MgO substrates
Kazumasa Iida, Jens Haenisch, Sascha Trommler +5
We have investigated the influence of the superconducting layer thickness, d, on the structural and transport properties of Co-doped BaFe2As2 films deposited on Fe-buffered MgO sub…
Epitaxial Growth of Superconducting Ba(Fe1-xCox)2As2 Thin Films on Technical IBAD-MgO Substrates
Kazumasa Iida, Jens Hänisch, Sascha Trommler +9
The biaxially textured growth of superconducting Co-doped BaFe2As2 (Ba-122) thin films has been realized on ion beam assisted deposition (IBAD) MgO coated conductor templates by em…
Coherent interfacial bonding on the FeAs tetrahedron in Fe/Ba(Fe(1-x)Co(x))2As2 bilayers
Thomas Thersleff, Kazumasa Iida, Silvia Haindl +9
We demonstrate the growth of epitaxial Fe/Ba(Fe(1-x)Co(x))2As2 (Fe/Ba-122) bilayers on MgO(001) and LSAT(001) single crystal substrates using Pulsed Laser Deposition (PLD). By expl…
Scaling behaviour of the critical current in clean epitaxial Ba(Fe1-xCox)2As2 thin films
K. Iida, J. Haenisch, T. Thersleff +6
The angular-dependent critical current density, Jc(theta), and the upper critical field, Hc2(theta), of epitaxial Ba(Fe1-xCox)2As2 thin films have been investigated. No Jc(theta) p…
Texture and morphology of epitaxially grown LuNi2B2C thin films on single crystalline MgO substrates of different orientation
T. Niemeier, R. Huhne, L. Schultz +1
This paper has been withdrawn and will be replaced as soon as possible.
Growth and characterization of epitaxial LuNi2B2C thin films on MgO single crystals
T. Niemeier, R. Hühne, A. Köhler +3
Biaxially textured LuNi2BC thin films with Tc up to 15.8 K and a residual resistivity ratio up to 15 have been prepared. The films were deposited on MgO(110) substrates using pulse…