Zobrazeno 1 - 10
of 2 900
pro vyhledávání: '"Biermann S"'
Publikováno v:
Phys. Rev. B 108, 205156 (2023)
Understanding competing instabilities in systems with correlated fermions remains one of the holy grails of modern condensed matter physics. Among the fermionic lattice models used to this effect, the extended Hubbard model occupies a prime place due
Externí odkaz:
http://arxiv.org/abs/2301.10755
Publikováno v:
Phys. Rev. B 108, 035143 (2023)
Systems with strong electronic Coulomb correlations often display rich phase diagrams exhibiting different ordered phases involving spin, charge, or orbital degrees of freedom. The theoretical description of the interplay of the corresponding collect
Externí odkaz:
http://arxiv.org/abs/2210.05540
Dimerized quantum magnets provide a unique possibility to investigate Bose-Einstein condensation of magnetic excitations in crystalline systems at low temperature. Here, we model the low-temperature magnetic properties of the recently synthesized spi
Externí odkaz:
http://arxiv.org/abs/2208.09246
Autor:
Leonov, I., Biermann, S.
Publikováno v:
Phys. Rev. B 103, 165108 (2021)
We explore the interplay of electron-electron correlations and surface effects in the prototypical correlated insulating material, NiO. In particular, we compute the electronic structure, magnetic properties, and surface energies of the $(001)$ and $
Externí odkaz:
http://arxiv.org/abs/2101.12558
Autor:
Chattopadhyay, S., Lenz, B., Kanungo, S., Sushila, Panda, S. K., Biermann, S., Schnelle, W., Manna, K., Kataria, R., Uhlarz, M., Skourski, Y., Zvyagin, S. A., Ponomaryov, A., Herrmannsdörfer, T., Patra, R., Wosnitza, J.
We report the synthesis and characterization of a new quantum magnet [2-[Bis(2-hydroxybenzyl)aminomethyl]pyridine]Ni(II)-trimer (BHAP-Ni3) in single-crystalline form. Our combined experimental and theoretical investigations reveal an exotic spin stat
Externí odkaz:
http://arxiv.org/abs/1908.10807
Autor:
Jana, S., Panda, S. K., Phuyal, D., Pal, B., Mukherjee, S., Dutta, A., Kumar, P. Anil, Hedlund, D., Schott, J., Thunstrom, P., Kvashnin, Y., Rensmo, H., Kamalakar, M. Venkata, Segre, Carlo. U., Svedlindh, P., Gunnarsson, K., Biermann, S., Eriksson, O., Karis, O., Sarma, D. D.
Tailoring transport properties of strongly correlated electron systems in a controlled fashion counts among the dreams of materials scientists. In copper oxides, varying the carrier concentration is a tool to obtain high-temperature superconducting p
Externí odkaz:
http://arxiv.org/abs/1810.10978
Publikováno v:
Phys. Rev. B 96, 045137 (2017)
In this work, we report the pressure dependence of the effective Coulomb interaction parameters (Hubbard U) in paramagnetic NiO within the constrained random phase approximation (cRPA). We consider five different low energy models starting from the m
Externí odkaz:
http://arxiv.org/abs/1612.07571
Autor:
Evtushinsky, D. V., Aichhorn, M., Sassa, Y., Liu, Z. -H., Maletz, J., Wolf, T., Yaresko, A. N., Biermann, S., Borisenko, S. V., Buchner, B.
Electronic correlations were long suggested not only to be responsible for the complexity of many novel materials, but also to form essential prerequisites for their intriguing properties. Electronic behavior of iron-based superconductors is far from
Externí odkaz:
http://arxiv.org/abs/1612.02313
Autor:
Fink, J., Rienks, E. D. L., Thirupathaiah, S., Nayak, J., van Roekeghem, A., Biermann, S., Wolf, T., Adelmann, P., Jeevan, H. S., Gegenwart, P., Wurmehl, S., Felser, C., Buechner, B.
Publikováno v:
Phys. Rev. B 95, 144513 (2017)
Angle-resolved photoemission spectroscopy (ARPES) is used to study the scattering rates of charge carriers from the hole pockets near Gamma in the iron-based high-Tc hole doped superconductors KxBa1-xFe2As2 x=0.4 and KxEu1-xFe2As2 x=0.55$ and the ele
Externí odkaz:
http://arxiv.org/abs/1611.00239
Autor:
Zhang, W. -L., Richard, P., van Roekeghem, A., Nie, S. -M., Xu, N., Zhang, P., Miao, H., Wu, S. -F., Yin, J. -X., Fu, B. B., Kong, L. -Y., Qian, T., Wang, Z. -J., Fang, Z., Sefat, A. S., Biermann, S., Ding, H.
Publikováno v:
Phys. Rev. B 94, 155155 (2016)
We performed an angle-resolved photoemission spectroscopy study of BaMn$_2$As$_2$ and BaMn$_2$Sb$_2$, which are isostructural to the parent compound BaFe$_2$As$_2$ of the 122 family of ferropnictide superconductors. We show the existence of a strongl
Externí odkaz:
http://arxiv.org/abs/1608.06110