Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Sologubenko, A. V."'
Autor:
Sologubenko, A. V., Lorenz, T., Mydosh, J. A., Thielemann, B., Ronnow, H. M., Ruegg, Ch., Kramer, K.
Publikováno v:
PHYSICAL REVIEW B 80, 220411(R) (2009)
We present experiments on the magnetic field-dependent thermal transport in the spin-1/2 ladder system (C$_5$H$_{12}$N)$_2$CuBr$_4$. The thermal conductivity $\kappa(B)$ is only weakly affected by the field-induced transitions between the gapless Lut
Externí odkaz:
http://arxiv.org/abs/0909.5180
Publikováno v:
Phys. Rev. B 79, 064406 (2009)
The interplay of different scattering mechanisms can lead to novel effects in transport. We show theoretically that the interplay of weak impurity and Umklapp scattering in spin-1/2 chains leads to a pronounced dip in the magnetic field dependence of
Externí odkaz:
http://arxiv.org/abs/0811.2836
Motivated by the observation of a giant Nernst effect in URu_2Si_2, the thermoelectric response of the related system UPt_2Si_2 was investigated using thermal and electric transport properties such as the Nernst and Seebeck effects, thermal conductiv
Externí odkaz:
http://arxiv.org/abs/0804.1318
Autor:
Sologubenko, A. V., Lorenz, T., Mydosh, J. A., Rosch, A., Shortsleeves, K. C., Turnbull, M. M.
Publikováno v:
Phys. Rev. Lett. 100, 137202 (2008)
We present a study of the magnetic field-dependent thermal transport in the spin S=1 chain material Ni(C2H8N2)2NO2(ClO4) (NENP). The measured thermal conductivity is found to be very sensitive to the field-induced changes in the spin excitation spect
Externí odkaz:
http://arxiv.org/abs/0712.3991
Publikováno v:
Phys. Rev. B 76, 020512(R) (2007)
In NdBa_2[Cu_{1-y}Ni_y]_3O_{7-\delta}, magnetic Ni-impurities suppress Tc but at the same time the pseudogap is strongly enhanced. This unique feature makes it an ideal system to study possible relations between the anomalous Nernst effect, supercond
Externí odkaz:
http://arxiv.org/abs/0706.1463
Autor:
Sologubenko, A. V., Berggold, K., Lorenz, T., Rosch, A., Shimshoni, E., Phillips, M. D., Turnbull, M. M.
Publikováno v:
Phys. Rev. Lett. 98, 107201 (2007)
We present experiments on the thermal transport in the spin-1/2 chain compound copper pyrazine dinitrate Cu(C_4 H_4 N_2)(NO_3)_2. The heat conductivity shows a surprisingly strong dependence on the applied magnetic field B, characterized at low tempe
Externí odkaz:
http://arxiv.org/abs/cond-mat/0612486
Publikováno v:
J. Low Temp. Phys. 147, 387 (2007)
We discuss the recent progress and the current status of experimental investigations of spin-mediated energy transport in spin-chain and spin-ladder materials with antiferromagnetic coupling. We briefly outline the central results of theoretical stud
Externí odkaz:
http://arxiv.org/abs/cond-mat/0611052
Publikováno v:
Phys. Rev. B 74, 184523 (2006)
We report data on the thermal conductivity K(T,H) along the basal plane of the hexagonal crystal structure of superconducting Mg{1-y}Al{y}B2 with y=0.02 and 0.07 at temperatures between 0.5 and 50 K and in external magnetic fields between 0 and 70 kO
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608143
Publikováno v:
Phys. Rev. Lett. 97, 115901 (2006)
We have measured the thermal conductivity of the spin S=1 chain compound Y2BaNiO5. Analyzing the anisotropy of the thermal transport allows to identify a definite spin-mediated thermal conductivity \kappa_s along the chain direction. The calculated s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603586
Publikováno v:
Phys. Rev. B 71, 020501(R) (2005)
We report data on the thermal conductivity \kappa(T,H) in the basal plane of hexagonal single-crystalline and superconducting Mg(B_{1-x}C_x)_2 (x= 0.03, 0.06) at temperatures between 0.5 and 50 K, and in external magnetic fields H between 0 and 50 kO
Externí odkaz:
http://arxiv.org/abs/cond-mat/0409110