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Akademický článek

Origin of the quasi-quantized Hall effect in ZrTe5

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)

A 3D quantum Hall effect has been reported in Dirac semimetal ZrTe5 due to a magnetic-field-driven Fermi surface instability. Here, the authors show evidence of quasi-quantized Hall response without Fermi surface instability, but they argue that it i

Externí odkaz: https://doaj.org/article/2b752722fa7e44ceb7ca8d18611d9e3e

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Akademický článek

Possible Quadrupole Density Wave in the Superconducting Kondo Lattice CeRh_{2}As_{2}

Autor: D. Hafner, P. Khanenko, E.-O. Eljaouhari, R. Küchler, J. Banda, N. Bannor, T. Lühmann, J. F. Landaeta, S. Mishra, I. Sheikin, E. Hassinger, S. Khim, C. Geibel, G. Zwicknagl, M. Brando

Publikováno v: Physical Review X, Vol 12, Iss 1, p 011023 (2022)

CeRh_{2}As_{2} has recently been reported to be a rare case of a multiphase unconventional superconductor close to a quantum critical point (QCP). Here, we present a comprehensive study of its normal-state properties and of the phase (I) below T_{0}�

Externí odkaz: https://doaj.org/article/f4188a0d411f425c9e8435ed1b328b00

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Akademický článek

Thermodynamic signatures of the field-induced states of graphite

Autor: D. LeBoeuf, C. W. Rischau, G. Seyfarth, R. Küchler, M. Berben, S. Wiedmann, W. Tabis, M. Frachet, K. Behnia, B. Fauqué

Publikováno v: Nature Communications, Vol 8, Iss 1, Pp 1-6 (2017)

Previous transport studies of graphite in strong magnetic fields have found a sequence of phase transitions with a still unresolved microscopic origin. Here the authors present ultrasound measurements enabling sharper resolution and demonstrating the

Externí odkaz: https://doaj.org/article/df2c7c3bf5224223a4325b798c4379b5

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Akademický článek

Systematic study of the Grüneisen ratio near quantum critical points

Autor: R. Küchler, P. Gegenwart, C. Geibel and F. Steglich

Publikováno v: Science and Technology of Advanced Materials, Vol 8, Iss 5, p 428 (2007)

At any pressure-sensitive quantum critical point (QCP), the volume thermal expansion coefficient is more singular than the specific heat. Consequently, the resulting critical Grüneisen ratio Γcr~βcr/Ccr, where βcr and Ccr denote the thermal expan

Externí odkaz: https://doaj.org/article/c1a7ea5266f647dca2a0b16160ae3e30

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Field-induced transition within the superconducting state of CeRh 2 As 2

Autor: D. Hafner, J. F. Landaeta, Manuel Brando, R. Cardoso-Gil, Andrew P. Mackenzie, Elena Hassinger, S. Khim, U. Stockert, R. Küchler, N. Bannor, J. Banda, P. M. R. Brydon, Daniel F. Agterberg, C. Geibel

Publikováno v: Science. 373:1012-1016

Funding: We acknowledge funding from the Physics of Quantum Materials department and the research group “Physics of Unconventional Metals and Superconductors (PUMAS)” of the Max Planck Society. C.G. and E.H. acknowledge support from the German Sc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3f7e3ee1e2b1a1644354dedc74618cb
https://doi.org/10.1126/science.abe7518

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New applications for the world’s smallest high-precision capacitance dilatometer and its stress-implementing counterpart

Autor: R. Küchler, R. Wawrzyńczak, H. Dawczak-Dębicki, J. Gooth, S. Galeski

Publikováno v: Review of Scientific Instruments. 94:045108

We introduce a new stress dilatometer with exactly the same size and weight as the world's smallest miniature capacitance dilatometer (height x width x depth = 15 mmx14 mmx15 mm, weight: 12 g). To develop this new device, only a single part of the mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12586b0b3275dce49150915de948ca26
https://doi.org/10.1063/5.0141974

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Tuning the Structural and Optoelectronic Properties of Cs(2)AgBiBr(6)Double-Perovskite Single Crystals through Alkali-Metal Substitution

Autor: Steffen Wiedmann, Elke Debroye, Joris Van de Vondel, Heng Zhang, Julian A. Steele, Martin Ottesen, Mischa Bonn, Hai I. Wang, Eduard Fron, R. Küchler, Cristina Martin, Johan Hofkens, Maarten B. J. Roeffaers, Martin Bremholm, Masoumeh Keshavarz

Publikováno v: Keshavarz, M, Debroye, E, Ottesen, M, Martin, C, Zhang, H, Fron, E, Küchler, R, Steele, J A, Bremholm, M, Van de Vondel, J, Wang, H I, Bonn, M, Roeffaers, M B J, Wiedmann, S & Hofkens, J 2020, ' Tuning the Structural and Optoelectronic Properties of Cs 2 AgBiBr 6 Double-Perovskite Single Crystals through Alkali-Metal Substitution ', Advanced Materials, vol. 32, no. 40, 2001878 . https://doi.org/10.1002/adma.202001878
Advanced Materials, 32, 40, pp. 1-10
Advanced Materials, 32, 1-10
Advanced Materials

Lead-free double perovskites have great potential as stable and nontoxic optoelectronic materials. Recently, Cs2AgBiBr6 has emerged as a promising material, with suboptimal photon-to-charge carrier conversion efficiency, yet well suited for high-ener

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7e6810667e60b3a20eac693cb14b492
https://doi.org/10.1002/adma.202001878

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