Zobrazeno 1 - 10
of 878
pro vyhledávání: '"Post K"'
Autor:
Legros, A., Post, K. W., Chauhan, Prashant, Rickel, D. G., He, Xi, Xu, Xiaotao, Shi, Xiaoyan, Bozovic, Ivan, Crooker, S. A., Armitage, N. P.
The recent observation of cyclotron resonance in optimally-doped La$_{2-x}$Sr$_x$CuO$_4$ using time-domain THz spectroscopy in high magnetic field has given new possibilities for the study of cuprate superconductors. One can measure the cyclotron mas
Externí odkaz:
http://arxiv.org/abs/2205.12444
Autor:
Post, K. W., Legros, A., Rickel, D. G., Singleton, J., McDonald, R. D., He, Xi, Bozovic, I., Xu, X., Shi, X., Armitage, N. P., Crooker, S. A.
Publikováno v:
Phys. Rev. B 103, 134515 (2021)
Using time-domain terahertz spectroscopy in pulsed magnetic fields up to 31 T, we measure the terahertz optical conductivity in an optimally-doped thin film of the high temperature superconducting cuprate La$_{1.84}$Sr$_{0.16}$CuO$_4$. We observe sys
Externí odkaz:
http://arxiv.org/abs/2006.09131
Autor:
McLeod, A. S., Zhang, J., Gu, M. Q., Jin, F., Zhang, G., Post, K. W., Zhao, X. G., Millis, A. J., Wu, W., Rondinelli, J. M., Averitt, R. D., Basov, D. N.
The ground state properties of correlated electron systems can be extraordinarily sensitive to external stimuli, such as temperature, strain, and electromagnetic fields, offering abundant platforms for functional materials. We present a metastable an
Externí odkaz:
http://arxiv.org/abs/1910.10361
Autor:
Zapf, S., Neubauer, D., Post, K. W., Kadau, A., Merz, J., Clauss, C., Löhle, A., Jeevan, H. S., Gegenwart, P., Basov, D. N., Dressel, M.
Publikováno v:
Comptes Rendus Physique 17, 188 (2016)
In a comprehensive study, we investigate the electronic scattering effects in EuFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$ by using Fourier-transform infrared spectroscopy. In spite of the fact that Eu$^{2+}$ local moments order around $T_\text{Eu} \approx 20
Externí odkaz:
http://arxiv.org/abs/1602.06544
Autor:
Charnukha, A., Post, K. W., Thirupathaiah, S., Pröpper, D., Wurmehl, S., Roslova, M., Morozov, I., Büchner, B., Yaresko, A. N., Boris, A. V., Borisenko, S. V., Basov, D. N.
Publikováno v:
Sci. Rep. 5, 18620 (2015)
Iron-based superconductors have been found to exhibit an intimate interplay of orbital, spin, and lattice degrees of freedom, dramatically affecting their low-energy electronic properties, including superconductivity. Albeit the precise pairing mecha
Externí odkaz:
http://arxiv.org/abs/1601.08195
Autor:
Fei, Z., Goldflam, M. D., Wu, J. -S., Dai, S., Wagner, M., McLeod, A. S., Liu, M. K., Post, K. W., Zhu, S., Janssen, G. C. A. M., Fogler, M. M., Basov, D. N.
Publikováno v:
Nano Lett. 15, 8271-8276 (2015)
We report on nano-infrared (IR) imaging studies of confined plasmon modes inside patterned graphene nanoribbons (GNRs) fabricated with high-quality chemical-vapor-deposited (CVD) graphene on Al2O3 substrates. The confined geometry of these ribbons le
Externí odkaz:
http://arxiv.org/abs/1512.06910
Autor:
McNally, D. E., Zellman, S., Yin, Z. P., Post, K. W., He, Hua, Hao, K., Kotliar, G., Basov, D., Homes, C. C., Aronson, M. C.
Publikováno v:
Physical Review B 92, 115142 (2015)
We present optical transmission measurements that reveal a charge gap of 0.86 eV in the local moment antiferromagnetic insulator BaMn$_2$As$_2$, an order of magnitude larger than previously reported. Density functional theory plus dynamical mean fiel
Externí odkaz:
http://arxiv.org/abs/1509.06759
Autor:
Zapf, S., Stingl, C., Post, K. W., Maiwald, J., Bach, N., Pietsch, I., Neubauer, D., Loehle, A., Clauss, C., Jiang, S., Jeevan, H. S., Basov, D. N., Gegenwart, P., Dressel, M.
Our comprehensive study on EuFe$_2$As$_2$ reveals a dramatic reduction of magnetic detwinning fields compared to other AFe$_2$As$_2$ (A = Ba, Sr, Ca) iron pnictides by indirect magneto-elastic coupling of the Eu$^{2+}$ ions. We find that only 0.1T ar
Externí odkaz:
http://arxiv.org/abs/1408.6666
Autor:
Chapler, B. C., Post, K. W., Richardella, A. R., Lee, J. S., Tao, J., Samarth, N., Basov, D. N.
We report on infrared (IR) optical experiments on Bi$_2$Te$_3$ and Mn-doped Bi$_2$Te$_3$ epitaxial thin films. In the latter film, dilute Mn doping (4.5\%) of the topologically nontrivial semiconductor host results in time-reversal-symmetry-breaking
Externí odkaz:
http://arxiv.org/abs/1405.4916
Autor:
McNally, D. E., Simonson, J. W., Post, K. W., Yin, Z. P., Pezzoli, M., Smith, G. J., Leyva, V., Marques, C., DeBeer-Schmitt, L., Kolesnikov, A. I., Zhao, Y., Lynn, J. W., Basov, D. N., Kotliar, G., Aronson, M. C.
We present inelastic neutron scattering and magnetization measurements of the antiferromagnetic insulator LaMnPO that are well described by a Heisenberg spin model. These measurements are consistent with the presence of two-dimensional magnetic corre
Externí odkaz:
http://arxiv.org/abs/1402.6312