J. Kačmarčı́k
YOU?
Author Swipe
View article: Single-gap two-band superconductivity well above the Pauli limit in non-centrosymmetric TaIr <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e574" altimg="si26.svg"> <mml:msub> <mml:mrow/> <mml:mrow> <mml:mn>2</mml:mn> </mml:mrow> </mml:msub> </mml:math> B <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e582" altimg="si26.svg"> <mml:msub> <mml:mrow/> <mml:mrow> <mml:mn>2</mml:mn> </mml:mrow> </mml:msub> </mml:math>
Single-gap two-band superconductivity well above the Pauli limit in non-centrosymmetric TaIr B Open
View article: Ising superconductivity in noncentrosymmetric bulk NbSe2
Ising superconductivity in noncentrosymmetric bulk NbSe2 Open
Ising superconductivity allows in-plane upper critical magnetic fields to vastly surpass Pauli limit by locking the antiparallel electron spins of Cooper pairs in the out-of-plane direction. It was first explicitly demonstrated in fully tw…
View article: Two-gap superconductivity in the noncentrosymmetric <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">L</mml:mi><mml:msub><mml:mi mathvariant="normal">a</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:msub><mml:mi mathvariant="normal">e</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math> compound
Two-gap superconductivity in the noncentrosymmetric compound Open
Point-contact Andreev reflection spectroscopy at low temperatures and high magnetic fields has been performed on a noncentrosymmetric La$_3$Se$_4$ superconductor with a critical temperature $T_c$ = 8 K. Two superconducting energy gaps $\De…
View article: Anti-hyperuniform diluted vortex matter induced by correlated disorder
Anti-hyperuniform diluted vortex matter induced by correlated disorder Open
Disordered hyperuniform materials are very promising for applications but the successful route for synthesizing them requires understanding the interactions induced by the host media that can switch off this hidden order. With this aim we …
View article: Disorder- and magnetic field-tuned fermionic superconductor-insulator transition in MoN thin films. Transport and STM studies
Disorder- and magnetic field-tuned fermionic superconductor-insulator transition in MoN thin films. Transport and STM studies Open
Superconductor-insulator transition (SIT) driven by disorder and transverse magnetic field has been investigated in ultrathin MoN films by means of transport measurements and scanning tunneling microscopy and spectroscopy. Upon decreasing …
View article: Unveiling the double-peak structure of quantum oscillations in the specific heat
Unveiling the double-peak structure of quantum oscillations in the specific heat Open
View article: Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation
Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation Open
We report about the influence of nitrogen incorporation on the superconducting transition temperature TC of TiNbMoTaW high entropy alloy films deposited using high power impulse magnetron sputtering. By measuring the temperature dependence…
View article: Unveiling the double-peak structure of quantum oscillations in the specific heat
Unveiling the double-peak structure of quantum oscillations in the specific heat Open
Quantum oscillation phenomenon is an essential tool to understand the electronic structure of quantum matter. Here we report a systematic study of quantum oscillations in the electronic specific heat $C_{el}$ in natural graphite. We show t…
View article: Defect-induced weak collective pinning in superconducting YB<sub>6</sub> crystals
Defect-induced weak collective pinning in superconducting YB<sub>6</sub> crystals Open
In a previous study (2017 Phys. Rev. B 96 144501), a strong variation in the superconducting transition temperature T c of YB 6 differing by a factor of two has been explained by a change in the density of yttrium and boron vacancies tunin…
View article: Multiple Transition Temperature Enhancement in Superconducting TiNbMoTaW High Entropy Alloy Films Through Tailored N Incorporation
Multiple Transition Temperature Enhancement in Superconducting TiNbMoTaW High Entropy Alloy Films Through Tailored N Incorporation Open
View article: Maltese Cross-Type Magnetic Phase Diagrams in Tm1- X Yb X B12 Antiferromagnets with Yb-Valence Instability and Dynamic Charge Stripes
Maltese Cross-Type Magnetic Phase Diagrams in Tm1- X Yb X B12 Antiferromagnets with Yb-Valence Instability and Dynamic Charge Stripes Open
View article: Extreme in-plane upper critical magnetic fields of heavily doped quasi-two-dimensional transition metal dichalcogenides
Extreme in-plane upper critical magnetic fields of heavily doped quasi-two-dimensional transition metal dichalcogenides Open
International audience
View article: Evidence of symmetry lowering in antiferromagnetic metal TmB<sub>12</sub> with dynamic charge stripes
Evidence of symmetry lowering in antiferromagnetic metal TmB<sub>12</sub> with dynamic charge stripes Open
Precise angle-resolved magnetoresistance (ARMR) and magnetization measurements have revealed (i) strong charge transport and magnetic anisotropy and (ii) emergence of a huge number of magnetic phases in the ground state of isotopically 11 …
View article: Evidence of symmetry lowering in antiferromagnetic metal TmB12 with dynamic charge stripes
Evidence of symmetry lowering in antiferromagnetic metal TmB12 with dynamic charge stripes Open
Precise angle-resolved magnetoresistance and magnetization measurements have revealed (i) strong charge transport and magnetic anisotropy and (ii) emergence of a huge number of magnetic phases in the ground state of TmB12 antiferromagnetic…
View article: Extreme in-plane upper critical magnetic fields of heavily doped quasi-two-dimensional transition metal dichalcogenides
Extreme in-plane upper critical magnetic fields of heavily doped quasi-two-dimensional transition metal dichalcogenides Open
Extreme in-plane upper critical magnetic fields $B_{c2//ab}$ strongly violating the Pauli paramagnetic limit have been observed in the misfit layer $(LaSe)_{1.14}(NbSe_2)$ and $(LaSe)_{1.14}(NbSe_2)_2$ single crystals with $T_c$ = 1.23 K a…
View article: Ground state and stability of the fractional plateau phase in metallic Shastry–Sutherland system TmB4
Ground state and stability of the fractional plateau phase in metallic Shastry–Sutherland system TmB4 Open
View article: Wide Critical Fluctuations of the Field-Induced Phase Transition in Graphite
Wide Critical Fluctuations of the Field-Induced Phase Transition in Graphite Open
In the immediate vicinity of the critical temperature (T_{c}) of a phase transition, there are fluctuations of the order parameter that reside beyond the mean-field approximation. Such critical fluctuations usually occur in a very narrow t…
View article: Zeeman-driven superconductor-insulator transition in strongly disordered MoC films: Scanning tunneling microscopy and transport studies in a transverse magnetic field
Zeeman-driven superconductor-insulator transition in strongly disordered MoC films: Scanning tunneling microscopy and transport studies in a transverse magnetic field Open
Superconductor insulator transition in transverse magnetic field is studied\nin the highly disordered MoC film with the product of the Fermi momentum and\nthe mean free path $k_F*l$ close to unity. Surprisingly, the Zeeman\nparamagnetic ef…
View article: Yu-Shiba-Rusinov bands in ferromagnetic superconducting diamond
Yu-Shiba-Rusinov bands in ferromagnetic superconducting diamond Open
Ferromagnetic superconducting nanodiamond films show Yu-Shiba-Rusinov bands with an extraordinarily large spatial extent.
View article: Local Magnetometry of Superconducting Mo<sub>8</sub>Ga<sub>41</sub> and Mo<sub>7</sub>VGa<sub>41</sub>: Vortex Pinning Study
Local Magnetometry of Superconducting Mo<sub>8</sub>Ga<sub>41</sub> and Mo<sub>7</sub>VGa<sub>41</sub>: Vortex Pinning Study Open
Endohedral gallide cluster superconductor Mo8Ga41 indicated some unusual superconducting properties that deviated from BCS theory.This was ascribed to possible multi-gap superconductivity.Moreover, these properties seem to vanish after the…
View article: Anomalous Anisotropy in Superconducting Nanodiamond Films Induced by Crystallite Geometry
Anomalous Anisotropy in Superconducting Nanodiamond Films Induced by Crystallite Geometry Open
Tunable electronic properties upon doping make laboratory-grown nanodiamond films a promising and intriguing platform for not only refining conventional electronics, but also developing superconducting quantum devices. In a variety of supe…
View article: Sub-kelvin Andreev reflection spectroscopy of superconducting gaps in FeSe
Sub-kelvin Andreev reflection spectroscopy of superconducting gaps in FeSe Open
Point contact Andreev reflection studies have been conducted on FeSe single crystals by lowering the temperatures down to 0.5 K. The point contact Andreev reflection spectra were analyzed in the framework of the two-band model. As a result…
View article: Single-gap superconductivity in Mo8Ga41
Single-gap superconductivity in Mo8Ga41 Open
View article: Single-gap superconductivity in Mo$_8$Ga$_{41}$
Single-gap superconductivity in Mo$_8$Ga$_{41}$ Open
In this paper, potential two-gap superconductivity in Mo$_8$Ga$_{41}$ is addressed in detail by means of thermodynamic and spectroscopic measurements. Combination of highly sensitive ac-calorimetry and scanning tunneling spectroscopy (STS)…
View article: On the origin of in-gap states in homogeneously disordered ultrathin films. MoC case
On the origin of in-gap states in homogeneously disordered ultrathin films. MoC case Open
View article: Pressure effect on the superconducting and the normal state of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>β</mml:mi><mml:mo>−</mml:mo><mml:mi mathvariant="normal">B</mml:mi><mml:msub><mml:mi mathvariant="normal">i</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Pd</mml:mi></mml:mrow></mml:math>
Pressure effect on the superconducting and the normal state of Open
The pressure effect up to 24.0 kbar on superconducting and normal-state properties of β-Bi2Pd single crystal (Tc≈4.98K at ambient pressure) has been investigated by measurements of the electrical resistivity. In addition, we have performed…
View article: Unconventional superconductivity in the strong-coupling limit for the heavy fermion system CeCoIn5
Unconventional superconductivity in the strong-coupling limit for the heavy fermion system CeCoIn5 Open
View article: Magnetic and thermodynamic properties of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Cu</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>TiSe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> single crystals
Magnetic and thermodynamic properties of single crystals Open
We present a detailed study of the phase diagram of copper-intercalated TiSe2 single crystals, combining local Hall-probe magnetometry, tunnel diode oscillator technique (TDO), and specific-heat and angle-resolved photoemission spectroscop…
View article: Single-gap superconductivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>β</mml:mi><mml:mtext>−</mml:mtext><mml:mi mathvariant="normal">B</mml:mi><mml:msub><mml:mi mathvariant="normal">i</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Pd</mml:mi></mml:mrow></mml:math>
Single-gap superconductivity in Open
The β-Bi2Pd compound has been proposed as another example of a multigap superconductor [Imai et al., J. Phys. Soc. Jpn. 81, 113708 (2012)10.1143/JPSJ.81.113708]. Here, we report on measurements of several important physical quantities capa…
View article: Puzzling evidence for surface superconductivity in the layered dichalcogenide Cu<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msub><mml:mrow/><mml:mrow><mml:mn>10</mml:mn><mml:mo>%</mml:mo></mml:mrow></mml:msub></mml:math>TiSe2
Puzzling evidence for surface superconductivity in the layered dichalcogenide CuTiSe2 Open