Zobrazeno 1 - 10
of 2 086
pro vyhledávání: '"A, Coldea"'
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:
Zajicek, Z., Reiss, P., Graf, D., Prentice, J. C. A., Sadki, Y., Haghighirad, A. A., Coldea, A. I.
Publikováno v:
npj Quantum Materials volume 9, Article number: 52 (2024)
Superconductivity of iron chalocogenides is strongly enhanced under applied pressure yet its underlying pairing mechanism remains elusive. Here, we present a quantum oscillations study up to 45 T in the high-$T_c$ phase of tetragonal FeSe$_{0.82}$S$_
Externí odkaz:
http://arxiv.org/abs/2407.12615
Autor:
Morfoot, Archie B., Kim, Timur K., Watson, Matthew D., Haghighirad, Amir A., Singh, Shiv J., Bultinck, Nick, Coldea, Amalia I.
Publikováno v:
Communications Physics 6, 362 (2023)
Iron-chalcogenide superconductors display rich phenomena caused by orbital-dependent band shifts and electronic correlations. Additionally, they are potential candidates for topological superconductivity due to the band inversion between the Fe $d$ b
Externí odkaz:
http://arxiv.org/abs/2401.10769
Autor:
Bristow, M., Gower, A., Prentice, J. C. A., Watson, M. D., Zajicek, Z., Blundell, S. J., Haghighirad, A. A., McCollam, A., Coldea, A. I.
Publikováno v:
Phys. Rev. B 108, 184507 (2023)
The upper critical field of multi-band superconductors can be an essential quantity to unravel the nature of superconducting pairing and its interplay with the electronic structure. Here we experimentally map out the complete upper critical field pha
Externí odkaz:
http://arxiv.org/abs/2311.04188
Publikováno v:
npj Quantum Materials, Vol 9, Iss 1, Pp 1-9 (2024)
Abstract We investigate the high-pressure phase of the iron-based superconductor FeSe0.89S0.11 using transport and tunnel diode oscillator studies using diamond anvil cells. We construct detailed pressure-temperature phase diagrams that indicate that
Externí odkaz:
https://doaj.org/article/a5b66030c710497cba58f643defe51be
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