Zobrazeno 1 - 10
of 299
pro vyhledávání: '"Rahm, J."'
Autor:
Hausser, H. N., Keller, J., Nordmann, T., Bhatt, N. M., Kiethe, J., Liu, H., von Boehn, M., Rahm, J., Weyers, S., Benkler, E., Lipphardt, B., Doerscher, S., Stahl, K., Klose, J., Lisdat, C., Filzinger, M., Huntemann, N., Peik, E., Mehlstäubler, T. E.
We present a scalable mixed-species Coulomb crystal clock based on the $^1S_0$ $\leftrightarrow$ $^3P_0$ transition in $^{115}$In$^+$. $^{172}$Yb$^+$ ions are co-trapped and used for sympathetic cooling. Reproducible interrogation conditions for mixe
Externí odkaz:
http://arxiv.org/abs/2402.16807
Publikováno v:
Chemistry of Materials 35, 8229 (2023)
Halide perovskites have emerged as a promising class of materials for photovoltaic applications. A challenge in these applications is how to prevent the crystal structure from degradation to photovoltaically inactive phases, which requires an underst
Externí odkaz:
http://arxiv.org/abs/2307.12100
Autor:
Fransson, Erik, Rosander, Petter, Eriksson, Fredrik, Rahm, J. Magnus, Tadano, Terumasa, Erhart, Paul
Publikováno v:
Communications Physics 6, 173 (2023)
The soft modes associated with continuous-order phase transitions are associated with strong anharmonicity. This leads to the overdamped limit where the phonon quasi-particle picture can breakdown. However, this limit is commonly restricted to a narr
Externí odkaz:
http://arxiv.org/abs/2211.08197
Autor:
Fan, Zheyong, Wang, Yanzhou, Ying, Penghua, Song, Keke, Wang, Junjie, Wang, Yong, Zeng, Zezhu, Xu, Ke, Lindgren, Eric, Rahm, J. Magnus, Gabourie, Alexander J., Liu, Jiahui, Dong, Haikuan, Wu, Jianyang, Chen, Yue, Zhong, Zheng, Sun, Jian, Erhart, Paul, Su, Yanjing, Ala-Nissila, Tapio
Publikováno v:
Journal of Chemical Physics 157, 114801 (2022)
We present our latest advancements of machine-learned potentials (MLPs) based on the neuroevolution potential (NEP) framework introduced in [Fan et al., Phys. Rev. B 104, 104309 (2021)] and their implementation in the open-source package GPUMD. We in
Externí odkaz:
http://arxiv.org/abs/2205.10046
Publikováno v:
Chemistry of Materials 34, 9364 (2022)
Alloying offers a way to tune many of the properties of the transition metal dichalcogenide (TMD) monolayers. While these systems in many cases have been thoroughly investigated previously, the fundamental understanding of critical temperatures, phas
Externí odkaz:
http://arxiv.org/abs/2204.11223
Autor:
Ekborg-Tanner, Pernilla, Rahm, J. Magnus, Rosendal, Victor, Bancerek, Maria, Rossi, Tuomas P., Antosiewicz, Tomasz J., Erhart, Paul
Publikováno v:
ACS Applied Nano Materials 5, 10225 (2022)
Pd nanoalloys show great potential as hysteresis-free, reliable hydrogen sensors. Here, a multi-scale modeling approach is employed to determine optimal conditions for optical hydrogen sensing using the Pd-Au-H system. Changes in hydrogen pressure tr
Externí odkaz:
http://arxiv.org/abs/2204.06229
Publikováno v:
Acta Materialia 227, 117697 (2022)
The thermodynamics of phase transitions between phases that are size-mismatched but coherent differs from conventional stress-free thermodynamics. Most notably, in open systems such phase transitions are always associated with hysteresis. In spite of
Externí odkaz:
http://arxiv.org/abs/2110.07883
Publikováno v:
Acta Materialia 211, 116893 (2021)
Due to their ability to reversibly absorb/desorb hydrogen without hysteresis, Pd--Au nanoalloys have been proposed as materials for hydrogen sensing. For sensing, it is important that absorption/desorption isotherms are reproducible and stable over t
Externí odkaz:
http://arxiv.org/abs/2103.14340
Autor:
Lange, R., Huntemann, N., Rahm, J. M., Sanner, C., Shao, H., Lipphardt, B., Tamm, Chr., Weyers, S., Peik, E.
Publikováno v:
Phys. Rev. Lett. 126, 011102 (2021)
We compare two optical clocks based on the $^2$S$_{1/2}(F=0)\to {}^2$D$_{3/2}(F=2)$ electric quadrupole (E2) and the $^2$S$_{1/2}(F=0)\to {}^2$F$_{7/2}(F=3)$ electric octupole (E3) transition of $^{171}$Yb$^{+}$ and measure the frequency ratio $\nu_{
Externí odkaz:
http://arxiv.org/abs/2010.06620
Publikováno v:
Physical Review Materials 4, 096001 (2020)
We report a comprehensive study of aqueous halide adsorption on nanoparticles of gold and palladium that addresses several limitations hampering the use of atomistic modeling as a tool for understanding and improving wet-chemical synthesis and relate
Externí odkaz:
http://arxiv.org/abs/2006.07068