Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Breunig, O."'
Autor:
Wang, Zhe, Schmidt, M., Loidl, A., Wu, Jianda, Zou, Haiyuan, Yang, Wang, Dong, Chao, Kohama, Y., Kindo, K., Gorbunov, D. I., Niesen, S., Breunig, O., Engelmayer, J., Lorenz, T.
Publikováno v:
Phys. Rev. Lett. 123, 067202 (2019)
We report a high-resolution terahertz spectroscopic study of quantum spin dynamics in the antiferromagnetic Heisenberg-Ising spin-chain compound BaCo$_2$V$_2$O$_8$ as a function of temperature and longitudinal magnetic field. Confined spinon excitati
Externí odkaz:
http://arxiv.org/abs/1903.05492
Autor:
Wang, Zhe, Lorenz, T., Gorbunov, D. I., Cong, P. T., Kohama, Y., Niesen, S., Breunig, O., Engelmayer, J., Herman, A., Wu, Jianda, Kindo, K., Wosnitza, J., Zherlitsyn, S., Loidl, A.
Publikováno v:
Phys. Rev. Lett. 120, 207205 (2018)
We report on magnetization, sound velocity, and magnetocaloric-effect measurements of the Ising-like spin-1/2 antiferromagnetic chain system BaCo$_2$V$_2$O$_8$ as a function of temperature down to 1.3 K and applied transverse magnetic field up to 60
Externí odkaz:
http://arxiv.org/abs/1805.02392
Autor:
Holbein, S., Ackermann, M., Chapon, L., Steffens, P., Gukasov, A., Sazonov, A., Breunig, O., Sanders, Y., Becker, P., Bohaty, L., Lorenz, T., Braden, M.
Publikováno v:
Phys. Rev. B 94, 104423 (2016)
The crystal structure of the double tungstate NaFe(WO$_4$)$_2$ arises from that of the spin-driven multiferroic MnWO$_4$ by inserting non-magnetic Na layers. NaFe(WO$_4$)$_2$ exhibits a three-dimensional incommensurate spin-spiral structure at low te
Externí odkaz:
http://arxiv.org/abs/1609.01849
Publikováno v:
Physical Review B 92, 180405(R) (2015)
Around 0.5 K, the entropy of the spin-ice Dy$_2$Ti$_2$O$_7$ has a plateau-like feature close to Pauling's residual entropy derived originally for water ice, but an unambiguous quantification towards lower temperature is prevented by ultra-slow therma
Externí odkaz:
http://arxiv.org/abs/1503.03856
Autor:
Breunig, O., Garst, M., Rosch, A., Sela, E., Buldmann, B., Becker, P., Bohaty, L., Müller, R., Lorenz, T.
Publikováno v:
Phys. Rev. B 91, 024423 (2015)
In this study the magnetic order of the spin-1/2 XXZ chain system Cs$_2$CoCl$_4$ in a temperature range from 50 mK to 0.5 K and in applied magnetic fields up to 3.5 T is investigated by high-resolution measurements of the thermal expansion and the sp
Externí odkaz:
http://arxiv.org/abs/1412.2988
Publikováno v:
Physical Review B 90, 104419 (2014)
BaCo$_2$V$_2$O$_8$ is a one-dimensional antiferromagnetic spin-1/2 chain system with pronounced Ising anisotropy of the magnetic exchange. Due to finite interchain interactions long-range antiferromagnetic order develops below $T_{\rm N} \simeq 5.5$
Externí odkaz:
http://arxiv.org/abs/1405.7273
Autor:
Breunig, O., Garst, M., Sela, E., Buldmann, B., Becker, P., Bohatý, L., Müller, R., Lorenz, T.
Publikováno v:
Phys. Rev. Lett. 111, 187202 (2013)
Comparing high-resolution specific heat and thermal expansion measurements to exact finite-size diagonalization, we demonstrate that Cs$_2$CoCl$_4$ for a magnetic field along the crystallographic b axis realizes the spin-$\frac{1}{2}$ XXZ chain in a
Externí odkaz:
http://arxiv.org/abs/1307.2870
Autor:
Niesen, S. K., Kolland, G., Seher, M., Breunig, O., Valldor, M., Braden, M., Grenier, B., Lorenz, T.
Publikováno v:
Phys. Rev. B 87, 224413 (2013)
In the effective Ising spin-1/2 antiferromagnetic chain system BaCo$_2$V$_2$O$_8, the magnetic-field influence is highly anisotropic. For magnetic fields along the easy axis $c$, the N\'{e}el order is strongly suppressed already for low fields and an
Externí odkaz:
http://arxiv.org/abs/1303.5599
Publikováno v:
Physical Review B 86, 060402(R) (2012)
Elementary excitations in the spin-ice compound Dy$_2$Ti$_2$O$_7$ can be described as magnetic monopoles propagating independently within the pyrochlore lattice formed by magnetic Dy ions. We studied the magnetic-field dependence of the thermal condu
Externí odkaz:
http://arxiv.org/abs/1205.5700
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