Zobrazeno 1 - 10
of 152
pro vyhledávání: '"Hemberger, Joachim"'
We report on the magnetoelectric dynamics in the linear magnetoelectric antiferromagnet TbPO$_4$ studied by broadband dielectric spectroscopy. For the phase transition into the magnetoelectric antiferromagnetic phase at $T_{N} \approx 2.3$ K, a finit
Externí odkaz:
http://arxiv.org/abs/2312.00726
Autor:
Akbar, Mochammad Yan Pandu, Salam, Syafitra, Grams, Cristoph P., Diantoro, Markus, Prijamboedi, Bambang, Hemberger, Joachim, Nugroho, Agustinus Agung
Publikováno v:
Journal of Applied Physics; 9/7/2024, Vol. 136 Issue 9, p1-7, 7p
Autor:
Grams, Christoph P., Brüning, Daniel, Kopatz, Severin, Lorenz, Thomas, Becker, Petra, Bohatý, Ladislav, Hemberger, Joachim
Quantum spin liquids represent a magnetic ground state arising in the presence of strong quantum fluctuations that preclude ordering down to zero temperature and leave clear fingerprints in the excitation spectra. While theory bears a variety of poss
Externí odkaz:
http://arxiv.org/abs/1912.04705
Autor:
Wang, Jialu, Yang, Liangwei, Rischau, Carl Willem, Xu, Zhuokai, Ren, Zhi, Lorenz, Thomas, Hemberger, Joachim, Lin, Xiao, Behnia, Kamran
Publikováno v:
npj Quantum Materials 4, (2019) 61
The fate of electric dipoles inside a Fermi sea is an old issue, yet poorly-explored. Sr$_{1-x}$Ca$_x$TiO$_{3}$ hosts a robust but dilute ferroelectricity in a narrow ($0.002
Externí odkaz:
http://arxiv.org/abs/1909.04278
Autor:
Engelmayer, Johannes, Lin, Xiao, Koç, Fulya, Grams, Christoph P., Hemberger, Joachim, Behnia, Kamran, Lorenz, Thomas
Publikováno v:
Phys. Rev. B 100, 195121 (2019)
We report on a thermal-expansion study of the ferroelectric phase transition in insulating Sr$_{1-x}$Ca$_x$TiO$_3$ ($x=0.009$) and its evolution upon increasing charge-carrier concentration up to $n\simeq 60 \times 10^{19}$cm$^{-3}$. Although electri
Externí odkaz:
http://arxiv.org/abs/1907.10011
Autor:
Engelmayer, Johannes, Lin, Xiao, Grams, Christoph P., German, Raphael, Fröhlich, Tobias, Hemberger, Joachim, Behnia, Kamran, Lorenz, Thomas
Publikováno v:
Phys. Rev. Materials 3, 051401 (2019)
We report on a study of charge transport in EuTiO$_{3-\delta}$ single crystals with carrier density tuned across several orders of magnitude. Comparing this system with other quasi-cubic perovskites, in particular strontium titanate, we draw a compre
Externí odkaz:
http://arxiv.org/abs/1902.05512
Autor:
Bagchi, Mahasweta, Pitz-Paal, Lea, Grams, Christoph P., Breunig, Oliver, Borgwardt, Nick, Wang, Zhiwei, Ando, Yoichi, Grüninger, Markus, Hemberger, Joachim
Publikováno v:
Phys. Rev. B 99, 161121 (2019)
The bulk electronic properties of compensated topological insulators are strongly affected by the self-organized formation of charge puddles at low temperature, but their response in the microwave frequency range is little studied. We employed broadb
Externí odkaz:
http://arxiv.org/abs/1902.03970
Autor:
Grams, Christoph P., Kopatz, Severin, Brüning, Daniel, Biesenkamp, Sebastian, Becker, Petra, Bohatý, Ladislav, Lorenz, Thomas, Hemberger, Joachim
LiCuVO$_4$ is a model system of a 1D spin-1/2 chain that enters a planar spin-spiral ground state below its N\'eel temperature of 2.4 K due to competing nearest and next nearest neighbor interactions. The spin-spiral state is multiferroic with an ele
Externí odkaz:
http://arxiv.org/abs/1902.01135
Autor:
Rischau, Carl Willem, Lin, Xiao, Grams, Christoph P., Finck, Dennis, Harms, Steffen, Engelmayer, Johannes, Lorenz, Thomas, Gallais, Yann, Fauqué, Benoît, Hemberger, Joachim, Behnia, Kamran
SrTiO$_{3}$, a quantum paraelectric, becomes a metal with a superconducting instability after removal of an extremely small number of oxygen atoms. It turns into a ferroelectric upon substitution of a tiny fraction of strontium atoms with calcium. Th
Externí odkaz:
http://arxiv.org/abs/1703.01495
Publikováno v:
Nature Communications 5, 4853 (2014)
Competing interactions in the so-called spin-ice compounds stabilize a frustrated ground-state with finite zero-point entropy and, interestingly, emergent magnetic monopole excitations. The properties of these monopoles are at the focus of recent res
Externí odkaz:
http://arxiv.org/abs/1307.8287