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Publications (26)

cond-mat.supr-con2013

Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)2As2

P. Marsik, C. N. Wang, M. Roessle +8

We studied the doping and temperature (T) dependence of the infrared (IR) response of Ba(Fe1-xCox)2As2 single crystals. We show that a weak band around 1000 cm-1, that was previous…

cond-mat.supr-con2020

Infrared spectroscopy study of the in-plane response of YBa2Cu3O6.6 in magnetic fields up to 30 Tesla

F. Lyzwa, B. Xu, P. Marsik +4

With Terahertz and Infrared spectroscopy we studied the in-plane response of an underdoped YBa2Cu3O6.6 single crystal with Tc=58(1) K in high magnetic fields up to B=30 Tesla appli…

cond-mat.supr-con2017

Superconductivity and charge carrier localization in ultrathin $L a_{1.85} S r_{0.15} Cu O_{4} / L a_{2} Cu O_{4}$ bilayers

K. Sen, P. Marsik, S. Das +6

$L a_{1.85} S r_{0.15} Cu O_{4}$ / $L a_{2} Cu O_{4}$ (LSCO15/LCO) bilayers with a precisely controlled thickness of N unit cells (UCs) of the former and M UCs of the latter ([LS…

cond-mat.str-el2011

Optical identification of hybrid magnetic and electric excitations in Dy3Fe5O12 garnet

P. D. Rogers, Y. J. Choi, E. Standard +10

Far-infrared spectra of magneto-dielectric Dy3Fe5O12 garnet were studied between 13 and 100 cm-1 and at low temperatures between 5 and 80 K. A combination of transmission, reflecti…

cond-mat.supr-con2018

Optical study of Dirac fermions and related phonon anomalies in antiferromagnetic compound CaFeAsF

B. Xu, H. Xiao, B. Gao +8

We performed optical studies on CaFeAsF single crystals, a parent compound of the 1111-type iron-based superconductors that undergoes a structural phase transition from tetragonal…

cond-mat.supr-con2016

Muon spin rotation and infrared spectroscopy study of magnetism and superconductivity in Ba $_{1 - x}$ K $_{x}$ Fe $_{2}$ As $_{2}$

B. P. P. Mallett, C. N. Wang, P. Marsik +6

Using muon spin rotation and infrared spectroscopy we study the relation between magnetism and superconductivity in Ba $_{1 - x}$ K $_{x}$ Fe $_{2}$ As $_{2}$ single crystals from t…

cond-mat.str-el2013

Optical probe of ferroelectric order in bulk and thin film perovskite titanates

M. RÃ¶ssle, C. N. Wang, P. Marsik +8

We have measured the temperature dependence of the direct band gap, $E_{g}$ , in SrTi $^{16}$ O $_{3}$ and BaTiO $_{3}$ and related materials with quantum-paraelectric and ferroelectric prope…

cond-mat.str-el2021

Total angular momentum dichroism of the terahertz vortex beams at the antiferromagnetic resonances

A. A. Sirenko, P. Marsik, L. Bugnon +4

Terahertz vortex beams with different superposition of the orbital angular momentum $l = \pm 1$ , $\pm 2$ , $\pm 3$ , and $\pm 4$ and spin angular momentum $I ¨ = \pm 1$ were used to…

cond-mat.supr-con2019

Band-selective clean- and dirty-limit superconductivity with nodeless gaps in the bilayer iron-based superconductor CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$

B. Xu, Z. C. Wang, E. Sheveleva +4

The optical properties of the new iron-based superconductor CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ with $T_{c} \sim 29$ ~K have been determined. In the normal state a good description of the low-f…

cond-mat.supr-con2020

Muon spin rotation and infrared spectroscopy study of $B a_{1 - x} N a_{x} F e_{2} A s_{2}$

E. Sheveleva, B. Xu, P. Marsik +8

The magnetic and superconducting properties of a series of underdoped $B a_{1 - x} N a_{x} F e_{2} A s_{2}$ (BNFA) single crystals with $0.19 \leq x \leq 0.34$ has been investigated with the…

cond-mat.other2025

Large magnon dichroism and other optical properties of hexagonal ferrite h-Lu0.6Sc0.4FeO3 with altermagnetic A2 spin ordering

V. A. Martinez, A. A. Sirenko, L. Bugnon +8

Multiferroic hexagonal h-Lu0.6Sc0.4FeO3 single crystals with non-collinear spins were studied using the THz and Raman scattering spectroscopies and ellipsometry. Antiferromagnetic…

cond-mat.mes-hall2026

Dynamics of surface electrons in a topological insulator: cyclotron resonance at room temperature

I. Mohelsky, F. Le Mardele, J. Dzian +13

The ability to manipulate the surface states of topological insulators using electric or magnetic fields under ambient conditions is a key step toward their integration into future…

cond-mat.mtrl-sci2020

Infrared study of the multiband low-energy excitations of the topological antiferromagnet MnBi $_{2}$ Te $_{4}$

Bing Xu, Y. Zhang, E. H. Alizade +14

With infrared spectroscopy we studied the bulk electronic properties of the topological antiferromagnet MnBi $_{2}$ Te $_{4}$ with $T_{N} ≃ 25 K$ . With the support of band str…

cond-mat.str-el2017

Infrared ellipsometry study of the photo-generated charge carriers at the (001) and (110) surfaces of SrTiO $_{3}$ crystals and the interface of corresponding LaAlO $_{3}$ /SrTiO $_{3}$ heterostructures

M. Yazdi-Rizi, P. Marsik, B. P. P. Mallett +7

With infrared (IR) ellipsometry and DC resistance measurements we investigated the photo-doping at the (001) and (110) surfaces of SrTiO $_{3}$ (STO) single crystals and at the corres…

cond-mat.supr-con2018

Scaling of the Fano effect of the in-plane Fe-As phonon and the superconducting critical temperature in Ba $_{1 - x}$ K $_{x}$ Fe $_{2}$ As $_{2}$

B. Xu, E. Cappelluti, L. Benfatto +11

By means of infrared spectroscopy we determine the temperature-doping phase diagram of the Fano effect for the in-plane Fe-As stretching mode in Ba $_{1 - x}$ K $_{x}$ Fe $_{2}$ As $_{2}$ .…

cond-mat.mtrl-sci2012

Electric-field-induced pyroelectric order and localization of the confined electrons in LaAlO3/SrTiO3 heterostructures

M. RÃ¶ssle, K. W. Kim, A. Dubroka +13

With infrared ellipsometry, x-ray diffraction, and electric transport measurements we investigated the electric-field-effect on the confined electrons at the LaAlO3/SrTiO3 interfac…

cond-mat.str-el2021

Infrared study of the interplay of charge, spin, and lattice excitations in the magnetic topological insulator EuIn $_{2}$ As $_{2}$

B. Xu, P. Marsik, S. Sarkar +4

We report an infrared spectroscopy study of the axion topological insulator candidate EuIn $_{2}$ As $_{2}$ for which the Eu moments exhibit an A-type antiferromagnetic (AFM) order below…

cond-mat.supr-con2020

Superconductivity-induced transverse plasma mode and phonon anomaly in the $c$ -axis response of the bilayer compound RbCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$

B. Xu, D. Munzar, A. Dubroka +7

With infrared spectroscopy we studied the out-of-plane ( $c$ -axis) response of the iron arsenide superconductor ACa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$ (A = Rb,Cs) which has a bilayer structure si…

cond-mat.mtrl-sci2016

X-ray absorption study of the ferromagnetic Cu moment at the $YB a_{2} C u_{3} O_{7} / L a_{2/3} C a_{1/3} Mn O_{3}$ interface and the variation of its exchange interaction with the Mn moment

K. Sen, E. Perret, A. Alberca +14

With x-ray absorption spectroscopy and polarized neutron reflectometry we studied how the magnetic proximity effect at the interface between the cuprate high- $T_{C}$ superconductor $…

cond-mat.mtrl-sci2018

Temperature-driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ZrTe $_{5}$

B. Xu, L. X. Zhao, P. Marsik +6

We present an infrared spectroscopy study of ZrTe $_{5}$ , which confirms a recent theoretical proposal that this material exhibits a temperature-driven topological quantum phase trans…

cond-mat.supr-con2016

Granular superconductivity and magnetic-field-driven recovery of macroscopic coherence in a cuprate/manganite multilayer

B. P. P. Mallett, J. Khmaladze, P. Marsik +6

We show that in Pr $_{0.5}$ La $_{0.2}$ Ca $_{0.3}$ MnO $_{3}$ /YBa $_{2}$ Cu $_{3}$ O $_{7}$ (PLCMO/YBCO) multilayers the low temperature state of YBCO is very resistive and rese…

cond-mat.supr-con2010

Coexistence and competition of magnetism and superconductivity on the nanometer scale in underdoped BaFe1.89Co0.11As2

P. Marsik, K. W. Kim, A. Dubroka +9

We report muon spin rotation (muSR) and infrared (IR) spectroscopy experiments on underdoped BaFe1.89Co0.11As2 which show that bulk magnetism and superconductivity (SC) coexist and…

cond-mat.str-el2020

Optical Signature of a Crossover from Mott- to Slater-type Gap in Sr $_{2}$ Ir $_{1 - x}$ Rh $_{x}$ O $_{4}$

B. Xu, P. Marsik, E. Sheveleva +5

With optical spectroscopy we provide evidence that the insulator-metal transition in Sr $_{2}$ Ir $_{1 - x}$ Rh $_{x}$ O $_{4}$ occurs close to a crossover from the Mott- to the Slater-type.…

cond-mat.mtrl-sci2023

Infrared ellipsometry study of the charge dynamics in K3p-terphenyl

We report an infrared ellipsometry study of the charge carrier dynamics in polycrystalline Kxp-terphenyl samples with nominal $x = 3$ , for which signatures of high-temperature superc…

cond-mat.mtrl-sci2016

Anisotropy of the infrared-active phonon modes in the mono-domain state of tetragonal SrTiO3 (110)

M. Yazdi-Rizi, P. Marsik, B. P. P. Mallett +1

With infrared and terahertz ellipsometry we investigated the anisotropy of the infrared active phonon modes in SrTiO3 (110) single crystals in the tetragonal state below the so-cal…

cond-mat.supr-con2012

Macroscopic phase segregation in superconducting K0.73Fe1.67Se2 as seen by muon spin rotation and infrared spectroscopy

C. N. Wang, P. Marsik, R. Schuster +8

Using muon spin rotation (\muSR) and infrared spectroscopy we investigated the recently discovered superconductor K0.73Fe1.67Se2 with Tc = 32 K. We show that the combined data can…

Publications (26)

Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)2As2

Infrared spectroscopy study of the in-plane response of YBa2Cu3O6.6 in magnetic fields up to 30 Tesla

Superconductivity and charge carrier localization in ultrathin La1.85​Sr0.15​CuO4​/La2​CuO4​ bilayers

Optical identification of hybrid magnetic and electric excitations in Dy3Fe5O12 garnet

Optical study of Dirac fermions and related phonon anomalies in antiferromagnetic compound CaFeAsF

Muon spin rotation and infrared spectroscopy study of magnetism and superconductivity in Ba1−x​Kx​Fe2​As2​

Optical probe of ferroelectric order in bulk and thin film perovskite titanates

Total angular momentum dichroism of the terahertz vortex beams at the antiferromagnetic resonances

Band-selective clean- and dirty-limit superconductivity with nodeless gaps in the bilayer iron-based superconductor CsCa2​Fe4​As4​F2​

Muon spin rotation and infrared spectroscopy study of Ba1−x​Nax​Fe2​As2​

Large magnon dichroism and other optical properties of hexagonal ferrite h-Lu0.6Sc0.4FeO3 with altermagnetic A2 spin ordering

Dynamics of surface electrons in a topological insulator: cyclotron resonance at room temperature

Infrared study of the multiband low-energy excitations of the topological antiferromagnet MnBi2​Te4​

Infrared ellipsometry study of the photo-generated charge carriers at the (001) and (110) surfaces of SrTiO3​ crystals and the interface of corresponding LaAlO3​/SrTiO3​ heterostructures

Scaling of the Fano effect of the in-plane Fe-As phonon and the superconducting critical temperature in Ba1−x​Kx​Fe2​As2​

Electric-field-induced pyroelectric order and localization of the confined electrons in LaAlO3/SrTiO3 heterostructures

Infrared study of the interplay of charge, spin, and lattice excitations in the magnetic topological insulator EuIn2​As2​

Superconductivity-induced transverse plasma mode and phonon anomaly in the c-axis response of the bilayer compound RbCa2​Fe4​As4​F2​

X-ray absorption study of the ferromagnetic Cu moment at the YBa2​Cu3​O7​/La2/3​Ca1/3​MnO3​ interface and the variation of its exchange interaction with the Mn moment

Temperature-driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ZrTe5​

Granular superconductivity and magnetic-field-driven recovery of macroscopic coherence in a cuprate/manganite multilayer

Coexistence and competition of magnetism and superconductivity on the nanometer scale in underdoped BaFe1.89Co0.11As2

Optical Signature of a Crossover from Mott- to Slater-type Gap in Sr2​Ir1−x​Rhx​O4​

Infrared ellipsometry study of the charge dynamics in K3p-terphenyl

Anisotropy of the infrared-active phonon modes in the mono-domain state of tetragonal SrTiO3 (110)

Macroscopic phase segregation in superconducting K0.73Fe1.67Se2 as seen by muon spin rotation and infrared spectroscopy

Superconductivity and charge carrier localization in ultrathin $L a_{1.85} S r_{0.15} Cu O_{4} / L a_{2} Cu O_{4}$ bilayers

Muon spin rotation and infrared spectroscopy study of magnetism and superconductivity in Ba $_{1 - x}$ K $_{x}$ Fe $_{2}$ As $_{2}$

Band-selective clean- and dirty-limit superconductivity with nodeless gaps in the bilayer iron-based superconductor CsCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$

Muon spin rotation and infrared spectroscopy study of $B a_{1 - x} N a_{x} F e_{2} A s_{2}$

Infrared study of the multiband low-energy excitations of the topological antiferromagnet MnBi $_{2}$ Te $_{4}$

Infrared ellipsometry study of the photo-generated charge carriers at the (001) and (110) surfaces of SrTiO $_{3}$ crystals and the interface of corresponding LaAlO $_{3}$ /SrTiO $_{3}$ heterostructures

Scaling of the Fano effect of the in-plane Fe-As phonon and the superconducting critical temperature in Ba $_{1 - x}$ K $_{x}$ Fe $_{2}$ As $_{2}$

Infrared study of the interplay of charge, spin, and lattice excitations in the magnetic topological insulator EuIn $_{2}$ As $_{2}$

Superconductivity-induced transverse plasma mode and phonon anomaly in the $c$ -axis response of the bilayer compound RbCa $_{2}$ Fe $_{4}$ As $_{4}$ F $_{2}$

X-ray absorption study of the ferromagnetic Cu moment at the $YB a_{2} C u_{3} O_{7} / L a_{2/3} C a_{1/3} Mn O_{3}$ interface and the variation of its exchange interaction with the Mn moment

Temperature-driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ZrTe $_{5}$

Optical Signature of a Crossover from Mott- to Slater-type Gap in Sr $_{2}$ Ir $_{1 - x}$ Rh $_{x}$ O $_{4}$