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pro vyhledávání: '"LaBarre, P. G."'
The anisotropic spin glass transition, in which spin freezing is observed only along the c-axis in pseudobrookite Fe$_2$TiO$_5$, has long been perplexing because the Fe$^{3+}$ moments (d$^5$) are expected to be isotropic. Recently, neutron diffractio
Externí odkaz:
http://arxiv.org/abs/2207.07085
Autor:
Li, Y., Phelan, D., Ye, F., Zheng, H., Krivyakina, E., Samarakoon, A., LaBarre, P. G., Neu, J., Siegrist, T., Rosenkranz, S., Syzranov, S. V., Ramirez, A. P.
The unusual anisotropy of the spin glass transition in the pseudobrookite system Fe$_2$TiO$_5$ has been interpreted as arising from an induced, van der Waals-like, interaction among magnetic clusters. Here we present susceptibility ($\chi$) and speci
Externí odkaz:
http://arxiv.org/abs/2207.06354
Autor:
LaBarre, P. G., Rydh, A., Palmer-Fortune, J., Frothingham, J. A., Hannahs, S. T., Ramirez, A. P., Fortune, N. A.
Surprisingly, magnetoquantum oscillations (MQO) characteristic of a metal with a Fermi surface have been observed in measurements of the topological Kondo insulator SmB6. As these MQO have only been observed in measurements of magnetic torque (dHvA)
Externí odkaz:
http://arxiv.org/abs/2204.05392
Autor:
LaBarre, P. G., Rydh, A., Palmer-Fortune, J., Frothingham, J. A., Hannahs, S. T., Ramirez, A. P., Fortune, N.
We report measurements of the low-temperature specific heat of Al-flux-grown samples of SmB$_6$ in magnetic fields up to 32 T. Quantum oscillations periodic in $1/H$ are observed between 8 and 32 T at selected angles between [001] and [111]. The obse
Externí odkaz:
http://arxiv.org/abs/2111.03758
Publikováno v:
Phys. Rev. Lett. 125, 247203 (2020)
The plateau at 1/3 of the saturation magnetization, $M_s$, in the metamagnet CeSb is accompanied by a state of ferromagnetic layers of spins in an up-up-down sequence. We measured $M$ and the specific heat, $C$, in the plateau, spin wave analyses of
Externí odkaz:
http://arxiv.org/abs/2004.05236
Autor:
Davenport, John L., Ge, Zhehao, Liu, Junyan, Nuñez-Lobato, Carlos, Moon, Seongphill, Lu, Zhengguang, Quezada, Eberth A., Hellier, Kaitlin, LaBarre, Patrick G., Taniguchi, Takashi, Watanabe, Kenji, Carter, Sue, Ramirez, Arthur P., Smirnov, Dmitry, Velasco Jr, Jairo
Publikováno v:
Appl. Phys. Lett. 115, 163504 (2019)
Scanning tunneling spectroscopy (STS) has yielded significant insight on the electronic structure of graphene and other two-dimensional (2D) materials. STS directly measures a fundamental and directly calculable quantity: the single particle density
Externí odkaz:
http://arxiv.org/abs/1910.09048
Autor:
LaBarre, P. G., Phelan, D., Xin, Y., Ye, F., Besara, T., Siegrist, T., Syzranov, S. V., Rosenkranz, S., Ramirez, A. P.
Publikováno v:
Phys. Rev. B 103, 220404 (2021)
We investigate the spin-glass transition in the strongly frustrated well-known compound $Fe_2TiO_5$. A remarkable feature of this transition, widely discussed in the literature, is its anisotropic properties: the transition manifests itself in the ma
Externí odkaz:
http://arxiv.org/abs/1905.11534
Autor:
Schaller, Daniel, LaBarre, Patrick G., Besara, Tiglet, Bucher, Ernst, Siegrist, Theo, Ramirez, Arthur P.
Publikováno v:
Phys. Rev. Materials 3, 104602 (2019)
Samarium sulfide (SmS) is a non-magnetic narrow-gap (0.06 eV) semiconductor which undergoes a transition to a metallic intermediate valence state at 6.5 kbar. Europium sulfide (EuS) is a ferromagnetic semiconductor with a Curie temperature of 16K and
Externí odkaz:
http://arxiv.org/abs/1905.04547
Weyl fermions scattering from a random Coulomb potential are predicted to exhibit resistivity versus temperature $\rho \space \alpha \space T^{-4}$ in a single particle model. Here we show that, in closed environment-grown polycrystalline samples of
Externí odkaz:
http://arxiv.org/abs/1808.07583
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