Zobrazeno 1 - 10
of 548
pro vyhledávání: '"Hallas, A. M."'
Autor:
Xu, Mingyu, Wang, Haozhe, Koirala, Krishna Prasad, Melnick, Corey, Peng, Cheng, González-Rivas, Mario U., Lu, Jiaqi, Wang, Le, Engelhard, Mark H., Du, Yingge, Ke, Xianglin, Green, Robert J., Hallas, Alannah M., Li, Jie, Kotliar, Gabriel, Xie, Weiwei
The interplay between crystal electric field splitting of d states and Hund's rule exchange energy in cobalt-based perovskites offers a promising avenue for inducing spin-state transitions. This study reports a new body-centered tetragonal (BCT) phas
Externí odkaz:
http://arxiv.org/abs/2410.18826
Autor:
Aamlid, Solveig Stubmo, Kim, Minu, González-Rivas, Mario U., Oudah, Mohamed, Takagi, Hidenori, Hallas, Alannah M.
Publikováno v:
Appl. Phys. Lett. 125, 021901 (2024)
High entropy materials are often entropy stabilized, meaning that the configurational entropy from multiple elements sharing a single lattice site stabilizes the structure. In this work, we study how high-pressure synthesis conditions can stabilize o
Externí odkaz:
http://arxiv.org/abs/2407.06388
Autor:
Aamlid, Solveig S., Mugiraneza, Sam, González-Rivas, Mario U., King, Graham, Hallas, Alannah M., Rottler, Jörg
An idealized high entropy oxide is characterized by perfect chemical disorder and perfect positional order. In this work, we investigate the extent to which short-range order (SRO) and local structural distortions impede that idealized scenario. Work
Externí odkaz:
http://arxiv.org/abs/2406.01841
Autor:
Cheng, P. -Y., Oudah, Mohamed, Hung, T. -L., Hsu, C. -E., Chang, C. -C., Haung, J. -Y., Liu, T. -C., Cheng, C. -M., Ou, M. -N., Chen, W. -T., Deng, L. Z., Lee, C. -C., Chen, Y. -Y., Kuo, C. -N., Lue, C. -S., Machts, Janna, Kojima, Kenji M., Hallas, Alannah M., Huang, C. -L.
Publikováno v:
Phys. Rev. Research 6 6, 033253 (2024)
We present a thorough investigation of the physical properties and superconductivity of the binary intermetallic V2Ga5. Electrical resistivity and specific heat measurements show that V2Ga5 enters its superconducting state below Tsc = 3.5 K, with a c
Externí odkaz:
http://arxiv.org/abs/2405.03499
Autor:
Oudah, Mohamed, Kung, Hsiang-Hsi, Sahu, Samikshya, Heinsdorf, Niclas, Schulz, Armin, Philippi, Kai, Sanchez, Marta-Villa De Toro, Cai, Yipeng, Kojima, Kenji, Schnyder, Andreas P., Takagi, Hidenori, Keimer, Bernhard, Bonn, Doug A., Hallas, Alannah M.
We present an exploration of the effect of electron-phonon coupling and broken inversion symmetry on the electronic and thermal properties of the semimetal LaRhGe$_3$. Our transport measurements reveal evidence for electron-hole compensation at low t
Externí odkaz:
http://arxiv.org/abs/2311.11402
Autor:
Aamlid, Solveig S., Johnstone, Graham H. J., Mugiraneza, Sam, Oudah, Mohamed, Rottler, Jörg, Hallas, Alannah M.
The prediction of new high entropy oxides (HEOs) remains a profound challenge due to their inherent chemical complexity. In this work, we combine experimental and computational methods to search for new HEOs in the tetravalent $A$O$_2$ family, using
Externí odkaz:
http://arxiv.org/abs/2305.04221
Autor:
Hamilton, Parker K., Moya, Jaime M., Hallas, Alannah M., Morosan, E., Baral, Raju, Frandsen, Benjamin A.
Publikováno v:
J. Appl. Cryst. 56, 1192 - 1199 (2023)
Symmetry-adapted distortion modes provide a natural way to describe distorted structures derived from higher-symmetry parent phases. Structural refinements using symmetry-mode amplitudes as fit variables have been used for at least 10 years in Rietve
Externí odkaz:
http://arxiv.org/abs/2303.14484
Autor:
Cote, Alexandra, Slimak, J. Eddie, Sethi, Astha, Reig-i-Plessis, Dalmau, Zhang, Qiang, Zhao, Yang, Adroja, Devashibhai, Morris, Gerald, Kolodiazhnyi, Taras, Hallas, Alannah M., Lynn, Jeffrey W., Cooper, S. Lance, MacDougall, Gregory J.
The sesquioxide, Ce$_{2}$O$_{3}$, has been a material of intense interest in recent years due to reports of an anomalous giant magnetodielectric effect and emergent mixed crystal field-phonon (vibronic) excitations below a putative antiferromagnetic
Externí odkaz:
http://arxiv.org/abs/2303.11878
The field of high entropy oxides (HEOs) flips traditional materials science paradigms on their head by seeking to understand what properties arise in the presence of profound configurational disorder. This disorder, which originates from multiple ele
Externí odkaz:
http://arxiv.org/abs/2302.04394
Autor:
Johnstone, Graham H. J., González-Rivas, Mario U., Taddei, Keith M., Sutarto, Ronny, Sawatzky, George A., Green, Robert J., Oudah, Mohamed, Hallas, Alannah M.
Publikováno v:
Journal of the American Chemical Society 144, 45, 20590-20600 (2022)
Spinel oxides are an ideal setting to explore the interplay between configurational entropy, site selectivity, and magnetism in high entropy oxides. In this work we characterize the magnetic properties of the spinel (Cr,Mn,Fe,Co,Ni)$_3$O$_4$ and stud
Externí odkaz:
http://arxiv.org/abs/2211.15798