Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Costel R. Rotundu"'
Autor:
Yijing Huang, José D. Querales-Flores, Samuel W. Teitelbaum, Jiang Cao, Thomas Henighan, Hanzhe Liu, Mason Jiang, Gilberto De la Peña, Viktor Krapivin, Johann Haber, Takahiro Sato, Matthieu Chollet, Diling Zhu, Tetsuo Katayama, Robert Power, Meabh Allen, Costel R. Rotundu, Trevor P. Bailey, Ctirad Uher, Mariano Trigo, Patrick S. Kirchmann, Éamonn D. Murray, Zhi-Xun Shen, Ivana Savić, Stephen Fahy, Jonathan A. Sobota, David A. Reis
Publikováno v:
Physical Review X, Vol 13, Iss 4, p 041050 (2023)
Quantifying electron-phonon interactions for the surface states of topological materials can provide key insights into surface-state transport, topological superconductivity, and potentially how to manipulate the surface state using a structural degr
Externí odkaz:
https://doaj.org/article/70dc6236398d4fb1b01eede1956ee628
Autor:
Chris Jozwiak, Jonathan A. Sobota, Kenneth Gotlieb, Alexander F. Kemper, Costel R. Rotundu, Robert J. Birgeneau, Zahid Hussain, Dung-Hai Lee, Zhi-Xun Shen, Alessandra Lanzara
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)
The spin-orbit interaction is central to the defining characteristics of topological insulators. Here, Jozwiaket al. report a spin-polarized unoccupied surface resonance coevolving with topological surface states from a pair of Rashba-like states thr
Externí odkaz:
https://doaj.org/article/067b67cd4af94dddbcc893e7cad61d5c
Autor:
Costel R. Rotundu, Shan Jiang, Xiaoyu Deng, Yiting Qian, Saeed Khan, David G. Hawthorn, Gabriel Kotliar, Ni Ni
Publikováno v:
APL Materials, Vol 3, Iss 4, Pp 041517-041517-8 (2015)
The structure, transport, thermodynamic properties, x-ray absorption spectra (XAS), and electronic structure of a new barium titanate suboxide, Ba1+δTi13−δO12 (δ = 0.11), are reported. It is a paramagnetic poor metal with hole carriers dominatin
Externí odkaz:
https://doaj.org/article/ee2fd73b4b57469ba582402bbecc5ff8
Autor:
Jonathan A. Sobota, Samuel W. Teitelbaum, Yijing Huang, José D. Querales-Flores, Robert Power, Meabh Allen, Costel R. Rotundu, Trevor P. Bailey, Ctirad Uher, Tom Henighan, Mason Jiang, Diling Zhu, Matthieu Chollet, Takahiro Sato, Mariano Trigo, Éamonn D. Murray, Ivana Savić, Patrick S. Kirchmann, Stephen Fahy, David A. Reis, Zhi-Xun Shen
We investigate coupled electron-lattice dynamics in the topological insulator Bi2Te3 with time-resolved photoemission and time-resolved x-ray diffraction. It is well established that coherent phonons can be launched by optical excitation, but selecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1057574b6383e32d649fd5d2e8705bc2
http://arxiv.org/abs/2212.09892
http://arxiv.org/abs/2212.09892
Autor:
Jonathan Sobota, Jian Lu, Shambhu Ghimire, Patrick S. Kirchmann, Tony F. Heinz, Ctirad Uher, Alexis Chacón, Costel R. Rotundu, Trevor P. Bailey, Denitsa Baykusheva, Hadas Soifer, David A. Reis
We report the observation of a novel nonlinear optical response from the prototypical three-dimensional topological insulator Bi$_2$Se$_3$ through the process of high-order harmonic generation. We find that the generation efficiency increases as the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16d464e9208efa454b12f84e2723d5cc
http://arxiv.org/abs/2109.15291
http://arxiv.org/abs/2109.15291
Autor:
Yu He, Edwin W. Huang, Brian Moritz, Junfeng He, Makoto Hashimoto, Yao Wang, Costel R. Rotundu, Zhi-Xun Shen, Mathias S. Scheurer, Thomas P. Devereaux, Donghui Lu, Tao Jia, Kejun Xu, Sudi Chen, Young S. Lee
Publikováno v:
Proceedings of the National Academy of Sciences. 116:3449-3453
Significance Fermi surface (FS) topology is a fundamental property of metals and superconductors. In electron-doped cuprate Nd 2− x Ce x CuO 4 , an unexpected FS reconstruction has been observed in optimal- and overdoped regime ( x = 0.15 − 0.17)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a898b3564c68631e985e323f8c075394
https://doi.org/10.1073/pnas.1816121116
https://doi.org/10.1073/pnas.1816121116
Autor:
Z.-X. Shen, Sudi Chen, Nicolas Gauthier, J. C. Palmstrom, Makoto Hashimoto, Heike Pfau, Costel R. Rotundu, Sung-Kwan Mo, Ian R. Fisher, D. H. Lu
Publikováno v:
Physical Review B. 103
Author(s): Pfau, H; Chen, SD; Hashimoto, M; Gauthier, N; Rotundu, CR; Palmstrom, JC; Fisher, IR; Mo, SK; Shen, ZX; Lu, D | Abstract: The hallmark of nematic order in iron-based superconductors is a resistivity anisotropy but it is unclear to which ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f95c516db065b35988f54e32aeb054d
https://doi.org/10.1103/physrevb.103.165136
https://doi.org/10.1103/physrevb.103.165136
Autor:
Johanna C. Palmstrom, Zhi-Xun Shen, G.-Y. Chen, Haidan Wen, Alexandre Gauthier, Ian R. Fisher, Hadas Soifer, Heike Pfau, Costel R. Rotundu, Jonathan Sobota, Patrick S. Kirchmann
Publikováno v:
Physical Review Materials. 4
We determine the work functions of the iron arsenic compounds $A{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$ ($A=\mathrm{Ca},\mathrm{Ba},\mathrm{Cs}$) using photoemission spectroscopy to be 2.7 eV for ${\mathrm{CaFe}}_{2}{\mathrm{As}}_{2}$, 1.8 eV for ${\math
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::003f633d1576dda6cc9b0697b6df04c7
https://doi.org/10.1103/physrevmaterials.4.034801
https://doi.org/10.1103/physrevmaterials.4.034801
Autor:
Joshua Straquadine, Johanna C. Palmstrom, Alexander T. Hristov, Zhi-Xun Shen, Pengcheng Dai, Robert J. Birgeneau, Makoto Hashimoto, Ian R. Fisher, Tong Chen, Donghui Lu, Ming Yi, Sudi Chen, Heike Pfau, Costel R. Rotundu
Publikováno v:
Physical review letters, vol 123, iss 6
The momentum dependence of the nematic order parameter is an important ingredient in the microscopic description of iron-based high-temperature superconductors. While recent reports on FeSe indicate that the nematic order parameter changes sign betwe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6347f89bb8292ab473b6a82acb5e8dc2
https://pubmed.ncbi.nlm.nih.gov/31491189
https://pubmed.ncbi.nlm.nih.gov/31491189
Autor:
Heike Pfau, Costel R. Rotundu, Ian R. Fisher, Johanna C. Palmstrom, Makoto Hashimoto, Alexander F. Kemper, D. H. Lu, Z.-X. Shen, Sudi Chen
Publikováno v:
Physical Review B. 99
The superconducting dome of most iron-based superconductors emerges from a phase with nematic and magnetic ordering. However, the multiband and multiorbital nature of iron-based superconductors as well as twinning effects pose challenges to fully cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ac0692b5c56e1ba3b3eaa312e08a91f
https://doi.org/10.1103/physrevb.99.035118
https://doi.org/10.1103/physrevb.99.035118