Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Grafe, Hans‐Joachim"'
Publikováno v:
Measurement, Vol. 237, 115075 (2024)
Interstellar travel requires propulsion systems beyond present possibilities and scientists search for new technologies and breakthrough concepts in physics. Frederick E. Alzofon came up with an alternative idea on the origin of the gravitational fie
Externí odkaz:
http://arxiv.org/abs/2402.15529
Autor:
Jakovac, Ivan, Dioguardi, Adam P., Grbić, Mihael S., Gu, Genda D., Tranquada, John M., Hicks, Clifford W., Požek, Miroslav, Grafe, Hans-Joachim
Publikováno v:
Physical Review B 108, 205113, (2023)
We study the response of spin and charge order in single crystals of La$_{1.875}$Ba$_{0.125}$CuO$_{4}$ to uniaxial stress, through $^{139}$La nuclear magnetic resonance (NMR) and $^{63}$Cu nuclear quadrupole resonance (NQR), respectively. In unstress
Externí odkaz:
http://arxiv.org/abs/2303.03145
Autor:
Lou, Rui, Suvorov, Oleksandr, Grafe, Hans-Joachim, Kuibarov, Andrii, Krivenkov, Maxim, Rader, Oliver, Büchner, Bernd, Borisenko, Sergey, Fedorov, Alexander
Publikováno v:
Phys. Rev. Research 5, 043011 (2023)
The nematicity in multilayer FeSe/SrTiO$_3$ films has been previously suggested to be enhanced with decreasing film thickness. Motivated by this, there have been many discussions about the competing relation between nematicity and superconductivity.
Externí odkaz:
http://arxiv.org/abs/2207.14416
Autor:
Scaravaggi, Francesco, Sauerland, Sven, Wang, Liran, Kappenberger, Rhea, Lepucki, Piotr, Dioguardi, Adam P., Hong, Xiaochen, Caglieris, Federico, Wuttke, Christoph, Hess, Christian, Grafe, Hans-Joachim, Aswartham, Saicharan, Wurmehl, Sabine, Klingeler, Rüdiger, Wolter, Anja U. B., Büchner, Bernd
Publikováno v:
Phys. Rev. B 103, 174506 (2021)
In this work we revisit the phase diagram of Co-doped LaFeAsO using single crystals and thermodynamic methods. From magnetic susceptibility studies we track the doping evolution of the antiferromagnetic phase, revealing a continuous suppression of $T
Externí odkaz:
http://arxiv.org/abs/2101.05760
Autor:
Lepucki, Piotr, Havemann, Raphael, Dioguardi, Adam P., Scaravaggi, Francesco, Wolter-Giraud, Anja U. B., Kappenberger, Rhea, Aswartham, Sai, Wurmehl, Sabine, Büchner, Bernd, Grafe, Hans-Joachim
Publikováno v:
Phys. Rev. B 103, 180506 (2021)
We determine the phase diagram of LaFe$_{1-x}$Co$_x$AsO single crystals by using nuclear magnetic resonance (NMR). Up to a nominal doping of $x=0.03$, it follows the phase diagram for F-doped polycrystals. Above $x=0.03$, the F-doped samples become s
Externí odkaz:
http://arxiv.org/abs/2011.13641
Autor:
Grafe, Hans-Joachim, Lepucki, Piotr, Witschel, Markus, Dioguardi, Adam P., Kappenberger, Rhea, Aswartham, Saicharan, Wurmehl, Sabine, Büchner, Bernd
Publikováno v:
Phys. Rev. B 101, 054519 (2020)
We present $^{75}$As Nuclear Magnetic and Quadrupole Resonance results (NMR, NQR) on a new set of LaFeAsO$_{1-x}$F$_x$ polycrystalline samples. Improved synthesis conditions led to more homogenized samples with better control of the fluorine content.
Externí odkaz:
http://arxiv.org/abs/2003.00733
Autor:
Hong, Xiaochen, Caglieris, Federico, Kappenberger, Rhea, Wurmehl, Sabine, Aswartham, Saicharan, Scaravaggi, Francesco, Lepucki, Piotr, Wolter, Anja U. B., Grafe, Hans-Joachim, Büchner, Bernd, Hess, Christian
Publikováno v:
Phys. Rev. Lett. 125, 067001 (2020)
The identification of electronic nematicity across series of iron-based superconductors raises the question of its relationship with superconductivity and other ordered states. Here, we report a systematic elastoresistivity study on LaFe$_{1-x}$Co$_x
Externí odkaz:
http://arxiv.org/abs/1908.00484
Autor:
Karnaushenko, Dmitriy D., Karnaushenko, Daniil, Grafe, Hans-Joachim, Kataev, Vladislav, Büchner, Bernd, Schmidt, Oliver G.
Three-dimensional self-assembly of lithographically patterned ultrathin films opens a path to manufacture microelectronic architectures with functionalities and integration schemes not accessible by conventional two-dimensional technologies. Among ot
Externí odkaz:
http://arxiv.org/abs/1805.00656
Autor:
Utz, Yannic, Hammerath, Franziska, Kraus, Roberto, Ritschel, Tobias, Geck, Jochen, Hozoi, Liviu, Brink, Jeroen van den, Mohan, Ashwin, Hess, Christian, Karmakar, Koushik, Singh, Surjeet, Bounoua, Dalila, Saint-Martin, Romuald, Pinsard-Gaudart, Loreynne, Revcolevschi, Alexandre, Buechner, Bernd, Grafe, Hans-Joachim
Publikováno v:
Phys. Rev. B 96, 115135 (2017)
The S=1/2 Heisenberg spin chain compound SrCuO2 doped with different amounts of nickel (Ni), palladium (Pd), zinc (Zn) and cobalt (Co) has been studied by means of Cu nuclear magnetic resonance (NMR). Replacing only a few of the S=1/2 Cu ions with Ni
Externí odkaz:
http://arxiv.org/abs/1706.02604
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