Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Coldea, Radu"'
Rare earth oxides have attracted interest as a platform for studying frustrated magnetism arising from bond dependent anisotropic interactions. Ordered rock salt compounds Na$_2$PrO$_3$ crystallize in two polymorphs ($\alpha$ and $\beta$) comprising
Externí odkaz:
http://arxiv.org/abs/2410.09171
Autor:
Okuma, Ryutaro, MacFarquharson, Kylie, Johnson, Roger D., Voneshen, David, Manuel, Pascal, Coldea, Radu
The physics of spin-orbit entangled magnetic moments of $4d$ and $5d$ transition metal ions on a honeycomb lattice has been much explored in search for unconventional magnetic orders or quantum spin liquids expected for compass spin models, where dif
Externí odkaz:
http://arxiv.org/abs/2410.09167
Autor:
Ma, Zeyu, Ni, Danrui, Kaib, David A. S., MacFarquharson, Kylie, Pearce, John S., Cava, Robert J., Valenti, Roser, Coldea, Radu, Coldea, Amalia I.
In the Kitaev honeycomb model, spins coupled by strongly-frustrated anisotropic interactions do not order at low temperature but instead form a quantum spin liquid with spin fractionalization into Majorana fermions and static fluxes. The realization
Externí odkaz:
http://arxiv.org/abs/2407.15657
Autor:
Pearce, John S., Kaib, David A. S., Ma, Zeyu, Ni, Danrui, Cava, R. J., Valenti, Roser, Coldea, Radu, Coldea, Amalia I.
Kitaev materials often order magnetically at low temperatures due to the presence of non-Kitaev interactions. Torque magnetometry is a very sensitive technique for probing the magnetic anisotropy, which is critical in understanding the magnetic groun
Externí odkaz:
http://arxiv.org/abs/2407.15658
Autor:
Woodland, Leonie, Macdougal, David, Cabrera, Ivelisse M., Thompson, Jordan D., Prabhakaran, D., Bewley, Robert I., Coldea, Radu
Publikováno v:
Phys. Rev. B 108, 184416 (2023)
The Ising chain realizes the fundamental paradigm of spin fractionalization, where locally flipping a spin creates two domain walls (spinons) that can separate apart at no energy cost. In a quasi-one-dimensional system, the mean-field effects of the
Externí odkaz:
http://arxiv.org/abs/2308.07699
Publikováno v:
Phys. Rev. B 108, 184417 (2023)
We present experimental and theoretical evidence of novel bound state formation in the low transverse field ordered phase of the quasi-one-dimensional Ising-like material CoNb$_2$O$_6$. High resolution single crystal inelastic neutron scattering meas
Externí odkaz:
http://arxiv.org/abs/2306.01948
Autor:
Cho, Hwanbeom, Blundell, Stephen J., Shiroka, Toni, MacFarquharson, Kylie, Prabhakaran, Dharmalingam, Coldea, Radu
Yb-based triangular magnets have recently attracted attention as promising candidates to explore frustrated quantum magnetism. However, some candidates have turned out to have significant amounts of site disorder, which significantly affects the low-
Externí odkaz:
http://arxiv.org/abs/2104.01005
Autor:
Laurell, Pontus, Scheie, Allen, Mukherjee, Chiron J., Koza, Michael M., Enderle, Mechtild, Tylczynski, Zbigniew, Okamoto, Satoshi, Coldea, Radu, Tennant, D. Alan, Alvarez, Gonzalo
Publikováno v:
Phys. Rev. Lett. 127, 037201 (2021)
The lack of methods to experimentally detect and quantify entanglement in quantum matter impedes our ability to identify materials hosting highly entangled phases, such as quantum spin liquids. We thus investigate the feasibility of using inelastic n
Externí odkaz:
http://arxiv.org/abs/2010.11164
Autor:
Macdougal, David, Williams, Stephanie, Prabhakaran, Dharmalingam, Bewley, Robert I., Voneshen, David J., Coldea, Radu
Publikováno v:
Phys. Rev. B 102, 064421 (2020)
We explore the magnetic excitations of the spin-1/2 triangular antiferromagnet Ba3CoSb2O9 in its 120 degree ordered phase using single-crystal high-resolution inelastic neutron scattering. Sharp magnons with no decay are observed throughout reciproca
Externí odkaz:
http://arxiv.org/abs/2006.15554
Publikováno v:
Proc. Nat. Acad. Sci. USA 117, 25219 (2020)
We construct a microscopic spin-exchange Hamiltonian for the quasi-1D Ising magnet CoNb$_2$O$_6$ that captures detailed and hitherto-unexplained aspects of its dynamic spin structure factor. We perform a symmetry analysis that recalls that an individ
Externí odkaz:
http://arxiv.org/abs/2004.04169