Zobrazeno 1 - 10
of 2 210
pro vyhledávání: '"Geibel C"'
Autor:
Khanenko, P., Hafner, D., Semeniuk, K., Banda, J., Luehmann, T., Baertl, F., Kotte, T., Wosnitza, J., Zwicknagl, G., Geibel, C., Landaeta, J. F., Khim, S., Hassinger, E., Brando, M.
Unconventional superconductivity in heavy-fermion systems appears often near magnetic quantum critical points (QCPs). This seems to be the case also for CeRh2As2 (Tc $\approx$ 0.31 K). CeRh2As2 shows two superconducting (SC) phases, SC1 and SC2, for
Externí odkaz:
http://arxiv.org/abs/2409.11894
Autor:
Banda, J., Hafner, D., Landaeta, J. F., Hassinger, E., Mitsumoto, K., Giovannini, M., Sereni, J. G., Geibel, C., Brando, M.
We present here a rare example of electronuclear quantum criticality in a metal. The compound YbCu4.6Au0.4 is located at an unconventional quantum critical point (QCP). In this material the relevant Kondo and RKKY exchange interactions are very weak,
Externí odkaz:
http://arxiv.org/abs/2308.15294
Autor:
Ajeesh, M. O., Materne, P., Reis, R. D. dos, Weber, K., Dengre, S., Sarkar, R., Khasanov, R., Kraft, I., León, A. M., Bi, W., Zhao, J., Alp, E. E., Medvedev, S., Ksenofontov, V., Rosner, H., Klauss, H. -H., Geibel, C., Nicklas, M.
Publikováno v:
Phys. Rev. B 107, 125136 (2023)
LuFe$_4$Ge$_2$ crystallizes in the ZrFe$_4$Si$_2$-type structure, hosting chains of Fe-tetrahedra giving rise to geometric frustration and low-dimensionality. The compound orders antiferromagnetically at around 36 K accompanied by a simultaneous stru
Externí odkaz:
http://arxiv.org/abs/2301.04596
Autor:
Knapp, J., Levitin, L. V., Nyéki, J., Ho, A. F., Cowan, B., Saunders, J., Brando, M., Geibel, C., Kliemt, K., Krellner, C.
The nature of the antiferromagnetic order in the heavy fermion metal YbRh$_2$Si$_2$, its quantum criticality, and superconductivity, which appears at low mK temperatures, remain open questions. We report measurements of the heat capacity over the wid
Externí odkaz:
http://arxiv.org/abs/2210.03673
Autor:
Seifert, M., Schmakat, P., Schulz, M., Jorba, P., Hutanu, V., Geibel, C., Deppe, M., Pfleiderer, C.
Publikováno v:
Physical Review Research 4, 043029 (2022)
We report neutron depolarization measurements of the suppression of long-range ferromagnetism and the emergence of magnetic irreversibilities and spin freezing in CePd$_{1-x}$Rh$_x$ around $x^*\approx0.6$. Tracking the temperature versus field histor
Externí odkaz:
http://arxiv.org/abs/2209.11246
Autor:
Landaeta, J. F., Khanenko, P., Cavanagh, D. C., Geibel, C., Khim, S., Mishra, S., Sheikin, I., Brydon, P. M. R., Agterberg, D. F., Brando, M., Hassinger, E.
Publikováno v:
Phys. Rev. X 12, 031001 (2022)
CeRh$_2$As$_2$ is an unconventional superconductor with multiple superconducting phases and $T_\mathrm{c} = 0.26$ K. When $H\parallel c$, it shows a field-induced transition at $\mu_0H^* = 4$ T from a low-field superconducting state SC1 to a high-fie
Externí odkaz:
http://arxiv.org/abs/2204.07975
Conventional type-II superconductivity in locally non-centrosymmetric LaRh$_2$As$_2$ single crystals
Autor:
Landaeta, J. F., Leon, A. M., Zwickel, S., Lühmann, T., Brando, M., Geibel, C., Eljaouhari, E. -O., Rosner, H., Zwicknagl, G., Hassinger, E., Khim, S.
Publikováno v:
Phys. Rev. B 106, 045107 (2022)
We report on the observation of superconductivity in LaRh$_2$As$_2$, which is the analogue without $f$-electrons of the heavy-fermion system with two superconducting phases CeRh$_2$As$_2$. A zero-resistivity transition, a specific-heat jump and a dro
Externí odkaz:
http://arxiv.org/abs/2204.07740
Autor:
Hafner, D., Khanenko, P., Eljaouhari, E. -O., Küchler, R., Banda, J., Bannor, N., Lühmann, T., Landaeta, J. F., Mishra, S., Sheikin, I., Hassinger, E., Khim, S., Geibel, C., Zwicknagl, G., Brando, M.
Publikováno v:
Phys. Rev. X 12, 011023 (2022)
CeRh2As2 has recently been reported to be a rare case of multi-phase unconventional superconductor [S. Khim et al., arXiv:2101.09522] close to a quantum critical point (QCP). Here, we present a comprehensive study of its normal state properties and o
Externí odkaz:
http://arxiv.org/abs/2108.06267
Autor:
Zhao, L., Hu, Z., Guo, H., Geibel, C., Lin, H. J., Chen, C. T., Khomskii, D. I., Tjeng, L. H., Komarek, A. C.
Publikováno v:
Crystals 11(4), 378 (2021)
We report on the synthesis and physical properties of cm-sized CoGeO$_3$ single crystals grown in a high pressure mirror furnace at pressures of 80~bar. Direction dependent magnetic susceptibility measurements on our single crystals reveal highly ani
Externí odkaz:
http://arxiv.org/abs/2103.14505
Autor:
Khim, S., Landaeta, J. F., Banda, J., Bannor, N., Brando, M., Brydon, P. M. R., Hafner, D., Küchler, R., Cardoso-Gil, R., Stockert, U., Mackenzie, A. P., Agterberg, D. F., Geibel, C., Hassinger, E.
Publikováno v:
Science 373, 1012 (2021)
We report the discovery of two-phase unconventional superconductivity in CeRh$_2$As$_2$. Using thermodynamic probes, we establish that the superconducting critical field of its high-field phase is as high as 14 T, remarkable in a material whose trans
Externí odkaz:
http://arxiv.org/abs/2101.09522