Zobrazeno 1 - 10
of 930
pro vyhledávání: '"Grove, M."'
Autor:
Choi, K. -Y., Grove, M., Lemmens, P., Fischer, M., Güntherodt, G., Ammerahl, U., Büchner, B., Dhalenne, G., Revcolevschi, A., Akimitsu, J.
We report inelastic light scattering experiments in the spin-chain and ladder system Sr_14-xCa_xCu_24O_41. A depletion of an electronic background is observed for 0 < x < 5 at low temperatures and with light polarization both parallel to the leg and
Externí odkaz:
http://arxiv.org/abs/cond-mat/0601203
Autor:
Sparta, K., Redhammer, G. J., Roussel, P., Heger, G., Roth, G., Lemmens, P., Ionescu, A., Grove, M., Guentherodt, G., Huening, F., Lueken, H., Kageyama, H., Onizuka, K., Ueda, Y.
A displacive, 2nd order structural phase transition at Ts=395 K from space group I`4 2 m below Ts to I 4/m c m above Ts has been discovered in the two-dimensional spin dimer compound SrCu2(BO3)2. The temperature evolution of the structure in both pha
Externí odkaz:
http://arxiv.org/abs/cond-mat/0012383
Autor:
Lemmens, Peter, Grove, M., Fischer, M., Guntherodt, G., Kotov, Valeri N., Kageyama, H., Onizuka, K., Ueda, Y.
Publikováno v:
Phys. Rev. Lett. 85, 2605 (2000).
We present a Raman light scattering study of the two-dimensional quantum spin system SrCu2(BO3)2 and show that the magnetic excitation spectrum has a rich structure, including several well-defined bound state modes at low temperature, and a scatterin
Externí odkaz:
http://arxiv.org/abs/cond-mat/0003094
Publikováno v:
aceepted for publication in PRB Feb. 2000
Single crystals of the spin-gap system $\rm (VO)_2P_2O_7$ have been investigated by means of Raman scattering. At temperatures below T=75 K~$\approx 2\Delta_{01}({\bf k}=0)$, with $\Delta_{01}$ the singlet-triplet gap, a shoulder appears at 47 cm$^{-
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912050
Autor:
Lemmens, P., Fischer, M., Grove, M., Loosdrecht, P. H. M. v., Els, G., Sherman, E., Pinettes, C., Güntherodt, G.
Publikováno v:
Advances in Solid State Physics Vol. 39, Vieweg Braunschweig 1999, p. 281-290
Many low dimensional spin systems with a dimerized or ladder-like antiferromagnetic exchange coupling have a gapped excitation spectrum with magnetic bound states within the spin gap. For spin ladders with an even number of legs the existence of spin
Externí odkaz:
http://arxiv.org/abs/cond-mat/9910074
Autor:
Pashkevich, Yu. G., Blinkin, V. A., Gnezdilov, V. P., Tsapenko, V. V., Eremenko, V. V., Lemmens, P., Fischer, M., Grove, M., Guentherodt, G., Degiorgi, L., Wachter, P., Tranquada, J. M., Buttrey, D. J.
We report Raman light-scattering and optical conductivity measurements on a single crystal of La(1.775)Sr(0.225)NiO(4) which exhibits incommensurate charge-stripe order. The extra phonon peaks induced by stripe order can be understood in terms of the
Externí odkaz:
http://arxiv.org/abs/cond-mat/9909270
Autor:
Lemmens, P., Fischer, M., Grove, M., Els, G., Güntherodt, G., Weiden, M., Geibel, C., Steglich, F.
Magnetic bound states are a general phenomenon in low dimensional antiferromagnets with gapped singlet states. Using Raman scattering on three compounds as dedicated examples we show how exchange topology, dimensionality, defects and thermal fluctuat
Externí odkaz:
http://arxiv.org/abs/cond-mat/9809289
Akademický článek
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Akademický článek
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Autor:
Blinkhorn, J.1,2 (AUTHOR) blinkhorn@shh.mpg.de, Grove, M.3 (AUTHOR)
Publikováno v:
Archaeological & Anthropological Sciences. 2021, Vol. 13 Issue 1, p1-7. 7p.