Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Lorenz, W. E. A."'
Electron spin resonance experiments in the quasi-1D S=1/2 antiferromagnet K$_2$CuSO$_4$Cl$_2$ reveal opening of a gap in absence of magnetic ordering, as well as an anisotropic shift of the resonance magnetic field. These features of magnetic excitat
Externí odkaz:
http://arxiv.org/abs/1810.02675
Publikováno v:
Phys. Rev. B 97, 174431 (2018)
The field induced quantum phase transitions in the disorder-free and disordered samples of the spin ladder material (CH_3)_2CHNH_3Cu(Cl_{1-x}Br_x)_3 are studied using magnetic calorimetry and magnetic neutron diffraction on single crystal samples. Dr
Externí odkaz:
http://arxiv.org/abs/1803.00375
Autor:
Kuzian, R. O., Klingeler, R., Lorenz, W. E. A., Wizent, N., Nishimoto, S., Nitzsche, U., Rosner, H., Milosavljevic, D., Hozoi, L., Yadav, R., Richter, J., Hauser, A., Geck, J., Hayn, R., Yushankhai, V., Siurakshina, L., Monney, C., Schmitt, T., Thar, J., Roth, G., Ito, T., Yamaguchi, H., Matsuda, M., Johnston, S., Malek, J., Drechsler, S-L.
Publikováno v:
New J.Phys. 20 (2018) 058001
In a recent work devoted to the magnetism of Li$_{2}$CuO$_{2}$, Shu et al. [New J. Phys. 19 (2017) 023026] have proposed a "simplified" unfrustrated microscopic model that differs considerably from the models refined through decades of prior work. We
Externí odkaz:
http://arxiv.org/abs/1708.06335
Publikováno v:
Phys. Rev. B 92, 134417 (2015)
The electron spin resonance spectrum of a quasi 1D S=1/2 antiferromagnet K2CuSO4Br2 was found to demonstrate an energy gap and a doublet of resonance lines in a wide temperature range between the Curie--Weiss and Ne\`{e}l temperatures. This type of m
Externí odkaz:
http://arxiv.org/abs/1507.07518
Publikováno v:
J. Magn. Magn. Mater. 370, 62 (2014)
We report magnetic, specific heat and ESR measurements on a series of $S=1/2$ spin ladder compounds Cu(Qnx)(Cl$_{(1-x)}$Br$_{x}$)$_{2}$. Down to $T=2$ K all the observables can be described by the spin ladder model with about 1% of $S=1/2$ impurities
Externí odkaz:
http://arxiv.org/abs/1402.2532
Autor:
Drechsler, S. -L., Nishimoto, S., Kuzian, R., Malek, J., Lorenz, W. E. A., Richter, J., Brink, J. van den, Schmitt, M., Rosner, H.
Publikováno v:
Phys. Rev. Lett. 106, 219701 (2011)
We show that LiVCuO4 should be described by strongly ferromagnetically coupled Heisenberg antiferromagnetic chains (HAC) in sharp contrast with the effective exchange integrals Ji given in Enderle et al., Phys. Rev. Lett. vol. 104, 237207 (2010), and
Externí odkaz:
http://arxiv.org/abs/1006.5070
Autor:
Nishimoto, S., Drechsler, S. -L., Kuzian, R. O., Brink, J. van den, Richter, J., Lorenz, W. E. A., Skourski, Y., Klingeler, R., Buechner, B.
Publikováno v:
Phys. Rev. Lett. 107, 097201 (2011)
An efficient and precise thermodynamic method to extract the interchain coupling (IC) of spatially anisotropic 2D or 3D spin-1/2 systems from their empirical saturation field H_s (T=0) is proposed. Using density-matrix renormalization group, hard-cor
Externí odkaz:
http://arxiv.org/abs/1004.3300
Autor:
Lorenz, W. E. A., Kuzian, R. O., Drechsler, S. -L., Stein, W. -D., Wizent, N., Behr, G., Malek, J., Nitzsche, U., Rosner, H., Hiess, A., Schmidt, W., Klingeler, R., Loewenhaupt, M., Buechner, B.
We present an inelastic neutron scattering investigation of Li2CuO2 detecting the long sought quasi-1D magnetic excitations with a large dispersion along the CuO2-chains studied up to 25 meV. The total dispersion is governed by a surprisingly large f
Externí odkaz:
http://arxiv.org/abs/0909.5687
Publikováno v:
Scopus-Elsevier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd93301bbdc9abe0178319789a2e45e6
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