muon spin rotation; multiferroic properties; resonant X-ray absorption and reflectometry; strongly correlated electronic materials; High temperature superconductors; magneto-optics; oxide multilayers; optical spectroscopy; neutron reflectometry and diffraction
Gaina Roxana, Nicholson Christopher W., Rumo Maxime, Sarkar Subhrangsu, Khmaladze Jarji, Paris Eugenio, Tseng Yi, Zhang Wenliang, Asmara Teguh C., McNally Daniel, Piamonteze Cinthia, Weschke Eugen, Schmitt Thorsten, Monney Claude, Bernhard Christian (2021), Long-ranged Cu-based order with $$d_{z^2}$$ orbital character at a YBa2Cu3O7/ manganite interface, in
npj Quantum Materials, 6(1), 12-12.
Xu Bing, Zhang Y., Alizade E. H., Jahangirli Z. A., Lyzwa F., Sheveleva E., Marsik P., Li Y. K., Yao Y. G., Wang Z. W., Shen B., Dai Y. M., Kataev V., Otrokov M. M., Chulkov E. V., Mamedov N. T., Bernhard C. (2021), Infrared study of the multiband low-energy excitations of the topological antiferromagnet MnBi2Te4, in
Physical Review B, 103(12), L121103-L121103.
Ni Zhuoliang, Xu B., Sánchez-Martínez M.-Á., Zhang Y., Manna K., Bernhard C., Venderbos J. W. F., de Juan F., Felser C., Grushin A. G., Wu Liang (2020), Linear and nonlinear optical responses in the chiral multifold semimetal RhSi, in
npj Quantum Materials, 5(1), 96-96.
Sheveleva E., Xu B., Marsik P., Lyzwa F., Mallett B. P. P., Willa K., Meingast C., Wolf Th., Shevtsova T., Pashkevich Yu. G., Bernhard C. (2020), Muon spin rotation and infrared spectroscopy study of Ba1−xNaxFe2As2, in
Physical Review B, 101(22), 224515-224515.
Xu B., Munzar D., Dubroka A., Sheveleva E., Lyzwa F., Marsik P., Wang C. N., Wang Z. C., Cao G. H., Bernhard C. (2020), Superconductivity-induced transverse plasma mode and phonon anomaly in the c -axis response of the bilayer compound RbCa2Fe4As4F2, in
Physical Review B, 101(21), 214512-214512.
Lyzwa F., Xu B., Marsik P., Sheveleva E., Crassee I., Orlita M., Bernhard C. (2020), Infrared spectroscopy study of the in-plane response of YBa2Cu3O6.6 in magnetic fields up to 30 Tesla, in
Physical Review Research, 2(2), 023218-023218.
Lyzwa F., Chan A., Khmaladze J., Fürsich K., Keimer B., Bernhard C., Minola M., Mallett B. P. P. (2020), Backfolded acoustic phonons as ultrasonic probes in metal-oxide superlattices, in
Physical Review Materials, 4(4), 043606-043606.
Baldini Edoardo, Sentef Michael A., Acharya Swagata, Brumme Thomas, Sheveleva Evgeniia, Lyzwa Fryderyk, Pomjakushina Ekaterina, Bernhard Christian, van Schilfgaarde Mark, Carbone Fabrizio, Rubio Angel, Weber Cédric (2020), Electron–phonon-driven three-dimensional metallicity in an insulating cuprate, in
Proceedings of the National Academy of Sciences, 117(12), 6409-6416.
Xu B., Marsik P., Sheveleva E., Lyzwa F., Louat A., Brouet V., Munzar D., Bernhard C. (2020), Optical Signature of a Crossover from Mott- to Slater-Type Gap in Sr2Ir1−xRhxO4, in
Physical Review Letters, 124(2), 027402-027402.
de Andrés Prada R., Gaina R., Biškup N., Varela M., Stahn J., Bernhard C. (2019), Controlling the strength of ferromagnetic order in YBa2Cu3O7/La2/3Ca1/3MnO3 multilayers, in
Physical Review B, 100(11), 115129-115129.
de Andrés Prada R., Golod T., Bernhard C., Krasnov V. M. (2019), Growth and Nanofabrication of All-Perovskite Superconducting/Ferromagnetic/Superconducting Junctions, in
Journal of Superconductivity and Novel Magnetism, 32(9), 2721-2726.
Khmaladze J., Sarkar S., Soulier M., Lyzwa F., de Andres Prada R., Perret E., Mallett B. P. P., Minola M., Keimer B., Bernhard C. (2019), Granular superconductivity and charge/orbital order in YBa2Cu3O7 /manganite trilayers, in
Physical Review Materials, 3(8), 084801-084801.
de Andrés Prada R., Golod T., Kapran O. M., Borodianskyi E. A., Bernhard Ch., Krasnov V. M. (2019), Memory-functionality superconductor/ferromagnet/superconductor junctions based on the high- Tc cuprate superconductors YBa2Cu3O7−x and the colossal magnetoresistive manganite ferromagnets La2/3X1/3MnO3+δ(X=Ca,Sr), in
Physical Review B, 99(21), 214510-214510.
Sirenko A. A., Marsik P., Bernhard C., Stanislavchuk T. N., Kiryukhin V., Cheong S.-W. (2019), Terahertz Vortex Beam as a Spectroscopic Probe of Magnetic Excitations, in
Physical Review Letters, 122(23), 237401-237401.
Xu B., Cappelluti E., Benfatto L., Mallett B. P. P., Marsik P., Sheveleva E., Lyzwa F., Wolf Th., Yang R., Qiu X. G., Dai Y. M., Wen H. H., Lobo R. P. S. M., Bernhard C. (2019), Scaling of the Fano Effect of the In-Plane Fe-As Phonon and the Superconducting Critical Temperature in Ba1−xKxFe2As2, in
Physical Review Letters, 122(21), 217002-217002.
Kozina M., Fechner M., Marsik P., van Driel T., Glownia J. M., Bernhard C., Radovic M., Zhu D., Bonetti S., Staub U., Hoffmann M. C. (2019), Terahertz-driven phonon upconversion in SrTiO3, in
Nature Physics, 15(4), 387-392.
Xu B., Wang Z. C., Sheveleva E., Lyzwa F., Marsik P., Cao G. H., Bernhard C. (2019), Band-selective clean-limit and dirty-limit superconductivity with nodeless gaps in the bilayer iron-based superconductor CsCa2Fe4As4F2, in
Physical Review B, 99(12), 125119-125119.
Mallett B. P. P., Marsik P., Munzar D., Bernhard C., Dubroka A. (2019), Signatures of the bonding-antibonding splitting in the c -axis infrared response of moderately underdoped bilayer and trilayer cuprate superconductors, in
Physical Review B, 99(5), 054513-054513.
Perret E., Monney C., Johnston S., Khmaladze J., Lyzwa F., Gaina R., Dantz M., Pelliciari J., Piamonteze C., Mallett B. P. P., Minola M., Keimer B., Schmitt T., Bernhard C. (2018), Coupled Cu and Mn charge and orbital orders in YBa2Cu3O7/Nd0.65(Ca1-ySry)0.35MnO3 multilayers, in
Communications Physics, 1(1), 45-45.
Xu B., Zhao L. X., Marsik P., Sheveleva E., Lyzwa F., Dai Y. M., Chen G. F., Qiu X. G., Bernhard C. (2018), Temperature-Driven Topological Phase Transition and Intermediate Dirac Semimetal Phase in ZrTe5, in
Physical Review Letters, 121(18), 187401-187401.
Xu B., Xiao H., Gao B., Ma Y. H., Mu G., Marsik P., Sheveleva E., Lyzwa F., Dai Y. M., Lobo R. P. S. M., Bernhard C. (2018), Optical study of Dirac fermions and related phonon anomalies in the antiferromagnetic compound CaFeAsF, in
Physical Review B, 97(19), 195110-195110.
Lyzwa F, Marsik P, Roddatis V, Bernhard C, Jungbauer M, Moshnyaga V (2018), In situ monitoring of atomic layer epitaxy via optical ellipsometry, in
Journal of Physics D: Applied Physics, 51(12), 125306-125306.
Lyzwa F, Marsik P, Roddatis V, Bernhard C, Jungbauer M, Moshnyaga V (2018), In situ monitoring of atomic layer epitaxy via optical ellipsometry, in
Journal of Physics D: Applied Physics, 51(12), 125306-125306.
Baldini Edoardo, Kubacka Teresa, Mallett Benjamin P. P., Ma Chao, Koohpayeh Seyed M., Zhu Yimei, Bernhard Christian, Johnson Steven L., Carbone Fabrizio (2018), Lattice-mediated magnetic order melting in TbMnO3, in
Physical Review B, 97(12), 125149-125149.
Baldini E., Chiodo L., Dominguez A., Palummo M., Moser S., Yazdi-Rizi M., Auböck G., Mallett B.P.P., Berger H., Magrez A., Bernhard C., Grioni M., Rubio A., Chergui M. (2017), Strongly bound excitons in anatase TiO2 single crystals and nanoparticles, in
Nature Communications, 8(1), 13-13.
Perret E, Sen K, Khmaladze J, Mallett B P P, Yazdi-Rizi M, Marsik P, Das S, Marozau I, Uribe-Laverde M A, de Andrés Prada R, Strempfer J, Döbeli M, Biškup N, Varela M, Mathis Y-L, Bernhard C (2017), Structural, magnetic and electronic properties of pulsed-laser-deposition grown SrFeO 3− δ thin films and SrFeO 3− δ /La 2/3 Ca 1/3 MnO 3 multilayers, in
Journal of Physics: Condensed Matter, 29(49), 495601-495601.
Sen K., Marsik P., Das S., Perret E., de Andres Prada R., Alberca A., Biškup N., Varela M., Bernhard C. (2017), Superconductivity and charge-carrier localization in ultrathin La1.85Sr0.15CuO4/La2CuO4 bilayers, in
Physical Review B, 95(21), 214506-214506.
This is a continuation proposal for our ongoing research on the interplay between magnetism and superconductivity (SC) in bulk high-Tc SC´s and on the emergent magnetic and electronic phenomena in thin-film-based multilayers from strongly correlated oxides. The multilayers are grown with our in-house PLD system, the single crystals are obtained through collaborations. The experimental techniques are THz- to UV-spectroscopy, in particular, THz- and IR-magneto-ellipsometry up to 7.5 Tesla; muon spin rotation (µSR); polarised neutron reflectometry (PNR); and resonant X-ray absorption, reflectometry and diffraction. The muon, neutron and resonant X-ray experiments are performed at various large scale facilities.We request funding for three PhD students and one Postdoc. The Postdoc is required since he needs to master the complex instrumentation for the PLD thin film growth and characterization and also the THz- and IR-magneto-ellipsometry. They will be working on the following three main topics:A) Interplay of magnetic and electronic orders with high-Tc superconductivity: Using THz- to UV-magneto-ellipsometry and µSR, we will study the various magnetic and electronic orders in the cuprate and iron arsenide high Tc´s and try to clarify their relationship with SC. Specific topics are the dramatic changes of the Fermi-surface around p*?0.19 and the relationship between a static charge density wave and SC in the cuprates and the complex magnetic phase diagram and the role of nematicity in the iron arsenides and selenides. B) Interface-effects in multilayers from cuprates and perovskite oxides: In the first place, we want to understand the mechanism that drives the so-called orbital reconstruction of the Cu ions at the interface of YBa2Cu3O7 (YBCO) with a perovskite oxide like La2/3Ca1/3MnO3. Furthermore, we want to follow up on our recent observation that a granular SC state with an insulator-like dc-resistivity is induced by an unknown interface effect in multilayers of YBCO with manganites, like (Nd,Pr)1-x(Ca1-ySry)xMnO3 (NCSMO), which are in an insulating, antiferromagnetic and charge/orbital ordered state. Notably, a macroscopically coherent SC response can be restored with a magnetic field which suppresses the charge/orbital order in the manganite (toward an itinerant ferromagnetic state). Finally, we want to use the magnetic-field-effect on the charge/orbital order and the related, large orthorhombic distortions in a NCSMO layer to influence the ferroelectric properties of a Sr1-xBaxTiO3 layer that is grown on top. The goal is to obtain a system for which the electric polarization can be rotated or switched on and off with a magnetic field.C) THz- and IR-ellipsometry in high magnetic field: We are developing a world-wide unique setup for THz- and IR-ellipsometry measurements in grazing incidence geometry and high magnetic fields up to 7.5 Tesla (partially financed by the R´EQUIP 206021_163980). This instrument will be used for high precision measurements of the magneto-dielectric tensor of various materials with strongly electronic correlations, including the ones from parts A) and B).