Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Shaik, N. E."'
Autor:
Wang, Qisi, Mustafi, S., Fogh, E., Astrakhantsev, N., He, Z., Biało, I., Chan, Ying, Martinelli, L., Horio, M., Ivashko, O., Shaik, N. E., von Arx, K., Sassa, Y., Paris, E., Fischer, M. H., Tseng, Y., Christensen, N. B., Galdi, A., Schlom, D. G., Shen, K. M., Schmitt, T., Rønnow, H. M., Chang, J.
Publikováno v:
Nature Communications 15, 5348 (2024)
Quantum fluctuations in low-dimensional systems and near quantum phase transitions have significant influences on material properties. Yet, it is difficult to experimentally gauge the strength and importance of quantum fluctuations. Here we provide a
Externí odkaz:
http://arxiv.org/abs/2311.16553
Publikováno v:
Phys. Rev. B 102, 214413 (2020)
We investigate the spin-1/2 Heisenberg model on a rectangular lattice, using the Gutzwiller projected variational wave function known as the staggered flux state. Using Monte Carlo techniques, the variational parameters and static spin-structure fact
Externí odkaz:
http://arxiv.org/abs/2005.03928
Akademický článek
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Autor:
Larsen, C. B., Rømer, A. T., Janas, S., Treue, F., Mønsted, B., Shaik, N. E., Rønnow, H. M., Lefmann, K.
Publikováno v:
Phys. Rev. B 99, 054432 (2019)
We have used exact numerical diagonalization to study the excitation spectrum and the dynamic spin correlations in the $s=1/2$ next-next-nearest neighbor Heisenberg antiferromagnet on the square lattice, with additional 4-spin ring exchange from high
Externí odkaz:
http://arxiv.org/abs/1812.04277
Autor:
Ivashko, O., Horio, M., Wan, W., Christensen, N. B., McNally, D. E., Paris, E., Tseng, Y., Shaik, N. E., Rønnow, H. M., Wei, H. I., Adamo, C., Lichtensteiger, C., Gibert, M., Beasley, M. R., Shen, K. M., Tomczak, J. M., Schmitt, T., Chang, J.
Publikováno v:
Nature Communications 10, 786 (2019)
The transition temperature $T_\textrm{c}$ of unconventional superconductivity is often tunable. For a monolayer of FeSe, for example, the sweet spot is uniquely bound to titanium-oxide substrates. By contrast for La$_{2-\mathrm{x}}$Sr$_\mathrm{x}$CuO
Externí odkaz:
http://arxiv.org/abs/1805.07173
Autor:
Fatale, S., Fatuzzo, C. G., Babkevich, P., Shaik, N. E., Pelliciari, J., Lu, X., McNally, D. E., Schmitt, T., Kikkawa, A., Taguchi, Y., Tokura, Y., Normand, B., Rønnow, H. M., Grioni, M.
Publikováno v:
Phys. Rev. B 96, 115149 (2017)
We use resonant inelastic x-ray scattering (RIXS) at the Cu L$_3$ edge to measure the charge and spin excitations in the "half-stuffed" Cu--O planes of the cuprate antiferromagnet Ba$_2$Cu$_3$O$_4$Cl$_2$. The RIXS line shape reveals distinct contribu
Externí odkaz:
http://arxiv.org/abs/1709.03427
Autor:
Yang, L., Jeong, M., Babkevich, P., Katukuri, Vamshi M., Náfrádi, B., Shaik, N. E., Magrez, A., Berger, H., Schefer, J., Ressouche, E., Kriener, M., Živković, I., Yazyev, O. V., Forró, L., Rønnow, H. M.
Publikováno v:
Phys. Rev. B 96, 024445 (2017)
We report magnetic and thermodynamic properties of a $4d^1$ (Mo$^{5+}$) magnetic insulator MoOPO$_4$ single crystal, which realizes a $J_1$-$J_2$ Heisenberg spin-$1/2$ model on a stacked square lattice. The specific-heat measurements show a magnetic
Externí odkaz:
http://arxiv.org/abs/1705.06433
Autor:
Babkevich, P., Shaik, N. E., Lançon, D., Kikkawa, A., Enderle, M., Ewings, R. A., Walker, H. C., Adroja, D. T., Manuel, P., Khalyavin, D. D., Taguchi, Y., Tokura, Y., Soda, M., Masuda, T., Rønnow, H. M.
Publikováno v:
Phys. Rev. B 96, 014410 (2017)
We report detailed neutron scattering studies on Ba$_2$Cu$_3$O$_4$Cl$_2$. The compound consists of two interpenetrating sublattices of Cu, labeled as Cu$_{\rm A}$ and Cu$_{\rm B}$, each of which forms a square-lattice Heisenberg antiferromagnet. The
Externí odkaz:
http://arxiv.org/abs/1704.04287
Autor:
Ivashko, O., Shaik, N. E., Lu, X., Fatuzzo, C. G., Dantz, M., Freeman, P. G., McNally, D. E., Destraz, D., Christensen, N. B., Kurosawa, T., Momono, N., Oda, M., Monney, C., Rønnow, H. M., Schmitt, T., Chang, J.
Publikováno v:
Phys. Rev. B 95, 214508 (2017)
A resonant inelastic x-ray scattering (RIXS) study of overdamped spin-excitations in slightly underdoped La$_{2-x}$Sr$_{x}$CuO$_4$ (LSCO) with $x=0.12$ and $0.145$ is presented. Three high-symmetry directions have been investigated: (1) the antinodal
Externí odkaz:
http://arxiv.org/abs/1702.02782
Autor:
Yang, L., Jeong, M., Arakcheeva, A., Živković, I., Náfrádi, B., Magrez, A., Pisoni, A., Jacimovic, J., Katukuri, V. M., Katrych, S., Shaik, N. E., Yazyev, O. V., Forró, L., Rønnow, H. M.
Publikováno v:
Phys. Rev. B 94, 104403 (2016)
We report the synthesis of single crystals of a novel layered iridate Ba$_{21}$Ir$_9$O$_{43}$, and present the crystallographic, transport and magnetic properties of this material. The compound has a hexagonal structure with two iridium oxide layers
Externí odkaz:
http://arxiv.org/abs/1607.06441