Zobrazeno 1 - 10
of 552
pro vyhledávání: '"Vaknin, D"'
Autor:
Ning, Zhenhua, Das, Pinaki, Lee, Y., Sangeetha, N. S., Abernathy, D. L., Johnston, D. C., McQueeney, R. J., Vaknin, D., Ke, Liqin
SrCr$_2$As$_2$ is an itinerant antiferromagnet in the same structural family as the SrFe2As2 high-temperature superconductors. We report our calculations of exchange coupling parameters $J_{ij}$ for SrCr$_2$As$_2$ using a static linear-response metho
Externí odkaz:
http://arxiv.org/abs/2408.05583
Autor:
Vaknin, D., Pakhira, Santanu, Schlagel, D., Islam, F., Zhang, Jianhua, Pajerowski, D., Wang, C. Z., Johnston, D. C., McQueeney, R. J.
Publikováno v:
Phys. Rev. B 101, 140406 (2020)
The development of long-range ferromagnetic (FM) order in dilute magnetic topological insulators can induce dissipationless electronic surface transport via the quantum anomalous Hall effect. We measure the magnetic excitations in a prototypical magn
Externí odkaz:
http://arxiv.org/abs/1912.08268
Autor:
Yan, J. -Q., Pajerowski, D., Ke, Liqin, Nedić, A. M., Sizyuk, Y., Gordon, Elijah, Orth, P. P., Vaknin, D., McQueeney, R. J.
Publikováno v:
Phys. Rev. Lett. 124, 167204 (2020)
The antiferromagnetic (AF) compound MnBi$_{2}$Te$_{4}$ is suggested to be the first realization of an antiferromagnetic (AF) topological insulator. Here we report on inelastic neutron scattering studies of the magnetic interactions in MnBi$_{2}$Te$_{
Externí odkaz:
http://arxiv.org/abs/1908.02332
Autor:
Wilde, J. M., Kreyssig, A., Vaknin, D., Sangeetha, N. S., Li, Bing, Tian, W., Orth, P. P., Johnston, D. C., Ueland, B. G., McQueeney, R. J.
Publikováno v:
Phys. Rev. B 100, 161113 (2019)
SrCo2As2 is a peculiar itinerant magnetic system that does not order magnetically, but inelastic neutron scattering experiments observe the same stripe-type antiferromagnetic (AF) fluctuations found in many of the Fe-based superconductors along with
Externí odkaz:
http://arxiv.org/abs/1907.11676
Autor:
Yan, J. -Q., Zhang, Q., Heitmann, T., Huang, Z. L., Wu, W. D., Vaknin, D., Sales, B. C., McQueeney, R. J.
Publikováno v:
Phys. Rev. Materials 3, 064202 (2019)
Millimeter-sized MnBi$_2$Te$_4$ single crystals are grown out of Bi-Te flux and characterized by measuring magnetic and transport properties, scanning tunneling microscope (STM) and spectroscopy (STS). The magnetic structure of MnBi$_2$Te$_4$ below T
Externí odkaz:
http://arxiv.org/abs/1902.10110
Publikováno v:
In Journal of Environmental Radioactivity November 2022 253-254
Autor:
Das, Pinaki, Sangeetha, N. S., Lindemann, George R., Heitmann, T. W., Kreyssig, A., Goldman, A. I., McQueeney, R. J., Johnston, D. C., Vaknin, D.
Publikováno v:
Phys. Rev. B 96, 014411 (2017)
Neutron diffraction and magnetic susceptibility studies of a polycrystalline SrCr$_2$As$_2$ sample reveal that this compound is an itinerant G-type antiferromagnet below the N${\rm \acute{e}}$el temperature $T_{\textrm N}$ = 590(5) K with the Cr magn
Externí odkaz:
http://arxiv.org/abs/1705.04246
Autor:
Kaneko, U. F., Gomes, P. F., Garcia-Flores, A. F., Yan, J. Q., Lograsso, T. A., Barberis, G. E., Vaknin, D., Granado, E.
Publikováno v:
Phys. Rev. B 96, 014506 (2017)
Raman scattering experiments on LaFeAsO with splitted antiferromagnetic (T_AFM = 140 K) and tetragonal-orthorhombic (T_S = 155 K) transitions show a quasi-elastic peak (QEP) in B2g symmetry (2 Fe tetragonal cell) that fades away below ~T_AFM and is a
Externí odkaz:
http://arxiv.org/abs/1702.03774
Autor:
Jayasekara, W. T., Pandey, Abhishek, Kreyssig, A., Sangeetha, N. S., Sapkota, A., Kothapalli, K., Anand, V. K., Tian, W., Vaknin, D., Johnston, D. C., McQueeney, R. J., Goldman, A. I., Ueland, B. G.
Publikováno v:
Phys. Rev. B 95, 064425 (2017)
Magnetization, neutron diffraction, and high-energy x-ray diffraction results for Sn-flux grown single-crystal samples of Ca(Co$_{1-x}$Fe$_{x}$)$_{y}$As$_{2}$, $0\leq x\leq1$, $1.86\leq y \leq 2$, are presented and reveal that A-type antiferromagneti
Externí odkaz:
http://arxiv.org/abs/1702.02104
Autor:
Li, B., Kawakita, Y., Zhang, Q., Wang, H., Feygenson, M., Yu, H. L., Wu, D., Ohara, K., Kikuchi, T., Shibata, K., Yamada, T., Chen, Y., He, J. Q., Vaknin, D., Wu, R. Q., Nakajima, K., Kanatzidis, M. G.
A solid conducts heat through both transverse and longitudinal acoustic phonons, but a liquid employs only longitudinal vibrations. Here, we report that the crystalline solid AgCrSe2 has liquid-like thermal conduction. In this compound, Ag atoms exhi
Externí odkaz:
http://arxiv.org/abs/1701.01192