Zobrazeno 1 - 10
of 640
pro vyhledávání: '"A. Paramekanti"'
Coherent helicity-dependent spin-phonon oscillations in the ferromagnetic van der Waals crystal CrI3
Autor:
P. Padmanabhan, F. L. Buessen, R. Tutchton, K. W. C. Kwock, S. Gilinsky, M. C. Lee, M. A. McGuire, S. R. Singamaneni, D. A. Yarotski, A. Paramekanti, J.-X. Zhu, R. P. Prasankumar
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
CrI3 is a van der Waals material which exhibits magnetic ordering down to the monolayer limit. Here, using ultrafast optical spectroscopy, Padmanabhan and Buessen et al. investigate the coupling between the magnetically ordered spins and lattice dist
Externí odkaz:
https://doaj.org/article/41f28a1cf9784d1c88679acbabf709c9
Magnetic skyrmion crystals with zero net skyrmion charge and zero topological Hall response are interesting candidate phases which can occur at a vanishing magnetic field in centrosymmetric systems. We study a minimal bilayer model of skyrmion crysta
Externí odkaz:
http://arxiv.org/abs/2409.04520
Motivated by ongoing work on pump-probe experiments and Floquet driven magnets, we theoretically study the impact of pumped and driven Einstein phonons with weak dissipation in multipolar Mott insulators. For Mott insulators with pseudospin-$1/2$ non
Externí odkaz:
http://arxiv.org/abs/2404.17633
Motivated by exploring doped multi-orbital antiferromagnets (AFMs) and altermagnets (ALMs) we explore minimal $t$-$J$ models on the square-octagon lattice which favor such collinear magnetic orders in the regime where spin exchange dominates. While t
Externí odkaz:
http://arxiv.org/abs/2403.17050
Publikováno v:
Phys. Rev. B 109, 184416 (2024)
Vacancy-ordered halide double perovskites hosting 4d/5d transition metals have emerged as a distinct platform for investigating unconventional magnetism arising out of the interplay of strong atomic spin-orbit coupling (SOC) and Coulomb interactions.
Externí odkaz:
http://arxiv.org/abs/2403.05633
Motivated by systems where a high temperature non-Fermi liquid gives way to low temperature $\mathbb{Z}_3$ Potts nematic order, we studied a three-orbital Sachdev-Ye-Kitaev (SYK) model in the large-$N$ limit. In the single-site limit, this model exhi
Externí odkaz:
http://arxiv.org/abs/2402.16952
Publikováno v:
PhysRevB.108.235169 (2023)
We study a class of multi-orbital models based on those proposed by Venderbos, Hu, and Kane which exhibit an interplay of topology, interactions, and fermion incoherence. In the non-interacting limit, these models exhibit trivial and Chern insulator
Externí odkaz:
http://arxiv.org/abs/2308.13601
Publikováno v:
Phys. Rev. B 109, 094423 (2024)
The quest for exotic quantum magnetic ground states, including the Kitaev spin liquid and quantum spin-ices, has led to the discovery of several quantum materials where low energy pseudospin-$1/2$ doublets arise from the splitting of spin-orbit entan
Externí odkaz:
http://arxiv.org/abs/2303.04169
Autor:
Piva, M. M., Souza, J. C., Brousseau-Couture, V., Sorn, Sopheak, Pakuszewski, K. R., John, Janas K., Adriano, C., Côté, M., Pagliuso, P. G., Paramekanti, Arun, Nicklas, M.
Publikováno v:
Phys. Rev. Research 5 013068 (2023)
In the ferromagnetic (FM) Weyl semimetal CeAlSi both space-inversion and time-reversal symmetries are broken. Our quantum oscillation (QO) data indicate that the FM ordering modifies the Fermi surface topology and also leads to an unusual drop in the
Externí odkaz:
http://arxiv.org/abs/2301.13707
Autor:
Bose, Anjishnu, Routh, Manodip, Voleti, Sreekar, Saha, Sudeep Kumar, Kumar, Manoranjan, Saha-Dasgupta, Tanusri, Paramekanti, Arun
Publikováno v:
Phys. Rev. B 108, 174422 (2023)
Recent theoretical and experimental work suggest that the honeycomb cobaltates, initially proposed as candidate Kitaev quantum magnets, are in fact described by a pseudospin-$1/2$ easy-plane spin Hamiltonian with nearest neighbor ferromagnetic (FM) e
Externí odkaz:
http://arxiv.org/abs/2212.13271