J. Wosnitza
Dresden University of Technology
Magnetic fieldPhysicsParamagnetismPhase transitionAntiferromagnetismElectron paramagnetic resonanceField (physics)Materials scienceFermi surfaceCondensed matter physicsOrganic superconductorMagnetizationSpin (physics)SuperconductivityQuantum oscillationsFerrimagnetismFerromagnetismAnisotropy
Publications 160
#3J. Wosnitza (TUD: Dresden University of Technology)H-Index: 26
#4N. Khan (University of Augsburg)H-Index: 14
Last. M. E. Zhitomirsky (UGA: University of Grenoble)H-Index: 7
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#1Vadim Grinenko (SJTU: Shanghai Jiao Tong University)H-Index: 2
#2Daniel Weston (KTH: Royal Institute of Technology)H-Index: 1
Last. J. Wosnitza (TUD: Dresden University of Technology)H-Index: 26
view all 22 authors...
The most well-known example of an ordered quantum state—superconductivity—is caused by the formation and condensation of pairs of electrons. Fundamentally, what distinguishes a superconducting state from a normal state is a spontaneously broken symmetry corresponding to the long-range coherence of pairs of electrons, leading to zero resistivity and diamagnetism. Here we report a set of experimental observations in hole-doped Ba1−xKxFe2As2. Our specific-heat measurements indicate the formation of...
#3Sanjay Kumar Singh (IIT: Indian Institute of Technology (BHU) Varanasi)H-Index: 80
#9M. Jeong (University of Birmingham)H-Index: 10
#1Eduard Bykov (TUD: Dresden University of Technology)H-Index: 2
#2Wei Liu (Technische Universität Darmstadt)H-Index: 2
Last. J. Wosnitza (TUD: Dresden University of Technology)H-Index: 26
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#1T. NomuraH-Index: 6
#2Atsushi IkedaH-Index: 26
Last. H. Tsuda
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We studied the acoustic properties of liquid oxygen up to 90 T by means of ultrasound measurements. We observed a monotonic decrease of the sound velocity and an asymptotic increase of the sound attenuation when applying magnetic fields. The unusual attenuation, twenty times as large as the zero-field value, suggests strong fluctuations of the local molecular arrangement. We point out that the observed fluctuations are related to a liquid-liquid transition or crossover, from a small-magnetizatio...
#5Zhen Zhang (HZDR: Helmholtz-Zentrum Dresden-Rossendorf)H-Index: 17
A number of recent experiments indicate that the iron-chalcogenide FeSe provides the long-sought possibility to study bulk superconductivity in the cross-over regime between the weakly coupled Bardeen--Cooper--Schrieffer (BCS) pairing and the strongly coupled Bose--Einstein condensation (BEC). We report on ^{77}e nuclear magnetic resonance experiments of FeSe, focused on the superconducting phase for strong magnetic fields applied along the caxis, where a distinct state with large spin pol...
#1Stanislaw Galeski (MPG: Max Planck Society)H-Index: 6
#2T. Ehmcke (TUD: Dresden University of Technology)H-Index: 2
Last. Manuel Brando (MPG: Max Planck Society)H-Index: 27
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The quantum Hall effect (QHE) is traditionally considered to be a purely two-dimensional (2D) phenomenon. Recently, however, a three-dimensional (3D) version of the QHE was reported in the Dirac semimetal ZrTe5. It was proposed to arise from a magnetic-field-driven Fermi surface instability, transforming the original 3D electron system into a stack of 2D sheets. Here, we report thermodynamic, spectroscopic, thermoelectric and charge transport measurements on such ZrTe5 samples. The measured prop...
#1Sergei ZvyaginH-Index: 29
#2Alexey PonomaryovH-Index: 11
Last. C. P. LandeeH-Index: 13
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#1S. MishraH-Index: 1
#2Denis I. GorbunovH-Index: 11
Last. Ilya SheikinH-Index: 31
view all 12 authors...
We present a comprehensive ultrasound study of the prototypical heavy-fermion material CeRhIn_5 examining the origin of the enigmatic 30 T transition. For a field applied at 2^\circfrom the caxis, we observed two sharp anomalies in the sound velocity, at B_m \approx20 T and B^* \approx30 T, in all the symmetry-breaking ultrasound modes at low temperatures. The lower-field anomaly corresponds to the well-known first-order metamagnetic incommensurate-to-commensurate transition. The ...
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