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Origin of oscillatory structures in the magnetothermal conductivity of the putative Kitaev magnet $\alpha$-RuCl$_3$

Autor: Bruin, J. A. N., Claus, R. R., Matsumoto, Y., Nuss, J., Laha, S., Lotsch, B. V., Kurita, N., Tanaka, H., Takagi, H.

The layered honeycomb magnet $\alpha$-RuCl$_3$ has been suggested to exhibit a field-induced quantum spin liquid state, in which the reported large thermal Hall effect close to the half-quantized value still remains a subject of debate. Recently, osc

Externí odkaz: http://arxiv.org/abs/2205.15839

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Proximate ferromagnetic state in the Kitaev model material $\alpha$-RuCl$_{3}$

$\alpha$-RuCl$_{3}$ is a major candidate for the realization of the Kitaev quantum spin liquid, but its zigzag antiferromagnetic order at low temperatures indicates deviations from the Kitaev model. We have quantified the spin Hamiltonian of $\alpha$

Externí odkaz: http://arxiv.org/abs/2008.02037

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Magneto-optical probe of the fully gapped Dirac band in ZrSiS

Autor: Uykur, E., Maulana, L. Z., Schoop, L. M., Lotsch, B. V., Dressel, M., Pronin, A. V.

Publikováno v: Phys. Rev. Research 1, 032015(R) (2019)

We present a far-infrared magneto-optical study of the gapped nodal-line semimetal ZrSiS in magnetic fields $B$ up to 7 T. The observed field-dependent features, which represent intra- (cyclotron resonance) and interband transitions, develop as $\sqr

Externí odkaz: http://arxiv.org/abs/1910.07571

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Flat optical conductivity in ZrSiS due to two-dimensional Dirac bands

Autor: Schilling, M. B., Schoop, L. M., Lotsch, B. V., Dressel, M., Pronin, A. V.

Publikováno v: Phys. Rev. Lett. 119, 187401 (2017)

ZrSiS exhibits a frequency-independent interband conductivity $\sigma(\omega) = \rm{const}(\omega) \equiv \sigma_{\rm{flat}}$ in a broad range from 250 to 2500 cm$^{-1}$ (30 - 300 meV). This makes ZrSiS similar to (quasi)two-dimensional Dirac electro

Externí odkaz: http://arxiv.org/abs/1707.09620

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Unconventional mass enhancement around the Dirac nodal loop in ZrSiS

Autor: Pezzini, S., van Delft, M. R., Schoop, L., Lotsch, B., Carrington, A., Katsnelson, M. I., Hussey, N. E., Wiedmann, S.

Publikováno v: Nature Physics volume 14, pages 178-183 (2018)

The topological properties of fermions arise from their low-energy Dirac-like band dispersion and associated chiralities. Initially confined to points, extensions of the Dirac dispersion to lines and even loops have now been uncovered and semimetals

Externí odkaz: http://arxiv.org/abs/1701.09119

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