Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Anshul Kogar"'
Publikováno v:
Structural Dynamics, Vol 11, Iss 2, Pp 024303-024303-10 (2024)
The temporal resolution of ultrafast electron diffraction at weakly relativistic beam energies ( ≲100 keV) suffers from space-charge induced electron pulse broadening. We describe the implementation of a radio frequency (RF) cavity operating in the
Externí odkaz:
https://doaj.org/article/7e1291b212d046e1a33ec5a4762138b0
Autor:
Yun Cheng, Alfred Zong, Jun Li, Wei Xia, Shaofeng Duan, Wenxuan Zhao, Yidian Li, Fengfeng Qi, Jun Wu, Lingrong Zhao, Pengfei Zhu, Xiao Zou, Tao Jiang, Yanfeng Guo, Lexian Yang, Dong Qian, Wentao Zhang, Anshul Kogar, Michael W. Zuerch, Dao Xiang, Jie Zhang
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-7 (2022)
The relationship between the charge density wave and excitonic correlations in a layered compound 1T-TiSe2 has remained controversial. Here, the authors observe a photo-induced dimensional crossover of the charge density wave and conclude that excito
Externí odkaz:
https://doaj.org/article/026c63f46d2a4a1bb7d6790eab819698
Autor:
Tyler Carbin, Xinshu Zhang, Adrian B. Culver, Hengdi Zhao, Alfred Zong, Rishi Acharya, Cecilia J. Abbamonte, Rahul Roy, Gang Cao, Anshul Kogar
Upon intense femtosecond photo-excitation, a many-body system can undergo a phase transition through a non-equilibrium route, but understanding these pathways remains an outstanding challenge. Here, we use time-resolved second harmonic generation to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04715a82a1cb4a12d11dcbc1054635d6
http://arxiv.org/abs/2305.05220
http://arxiv.org/abs/2305.05220
Autor:
Edoardo Baldini, Alfred Zong, Dongsung Choi, Changmin Lee, Marios H. Michael, Lukas Windgaetter, Igor I. Mazin, Simone Latini, Doron Azoury, Baiqing Lv, Anshul Kogar, Yifan Su, Yao Wang, Yangfan Lu, Tomohiro Takayama, Hidenori Takagi, Andrew J. Millis, Angel Rubio, Eugene Demler, Nuh Gedik
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America
The excitonic insulator is an electronically driven phase of matter that emerges upon the spontaneous formation and Bose condensation of excitons. Detecting this exotic order in candidate materials is a subject of paramount importance, as the size of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b47c19b6293bf64f792ca40517658ce1
https://hdl.handle.net/21.11116/0000-000C-FEAB-621.11116/0000-000C-FEAD-421.11116/0000-000C-FEAE-3
https://hdl.handle.net/21.11116/0000-000C-FEAB-621.11116/0000-000C-FEAD-421.11116/0000-000C-FEAE-3
Autor:
Anshul Kogar, Su-Yang Xu, Tay-Rong Chang, Thao H. Dinh, Takashi Taniguchi, Bahadur Singh, Pablo Jarillo-Herrero, Guo Zong, Jacob Ruff, Goran Karapetrov, Hsin Lin, Kenji Watanabe, Chuang-Han Hsu, Di Xiao, Shin-Ming Huang, Qiong Ma, Nuh Gedik, Yang Gao, Andrés M. Mier Valdivia
Publikováno v:
Nature. 578:545-549
The observation of chirality is ubiquitous in nature. Contrary to intuition, the population of opposite chiralities is surprisingly asymmetric at fundamental levels. Examples range from parity violation in the subatomic weak force to the homochiralit
Autor:
Alfred Zong, Yun Cheng, Jun Li, Wei Xia, Shaofeng Duan, Wenxuan Zhao, Yidian Li, Fengfeng Qi, Jun Wu, Lingrong Zhao, Pengfei Zhu, Xiao Zou, Tao Jiang, Yanfeng Guo, Lexian Yang, Dong Qian, Wentao Zhang, Anshul Kogar, Michael W. Zuerch, Dao Xiang, Jie Zhang
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
1T-TiSe2 hosts a 3D charge-density-wave (CDW) state that also features exciton condensation. We find that photoexcitation suppresses the 3D CDW while creating a 2D CDW, a process controlled by the excitonic correlations in the system.
Autor:
Joshua Straquadine, Xiaozhe Shen, Yifan Su, Ian R. Fisher, Pavel E. Dolgirev, Anshul Kogar, Edbert J. Sie, Jie Yang, Duan Luo, Michael Kozina, Stephen Weathersby, Alfred Zong, Renkai Li, Xijie Wang, Suji Park, Xirui Wang, Pablo Jarillo-Herrero, Eugene Demler, Nuh Gedik, Alexander H. Reid
Publikováno v:
Physical Review Letters. 127
Engineering novel states of matter with light is at the forefront of materials research. An intensely studied direction is to realize broken-symmetry phases that are "hidden" under equilibrium conditions but can be unleashed by an ultrashort laser pu
Publikováno v:
Springer International Publishing
Exciting electrons in solids with intense light pulses offers the possibility of generating new states of matter through nonthermal means and controlling their macroscopic properties on femto- to picosecond timescales. One way to manipulate a solid i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6dad5e5bf3d1d55d488ff449d237644d
https://hdl.handle.net/1721.1/132728
https://hdl.handle.net/1721.1/132728
Publikováno v:
SciPost Physics, Vol 3, Iss 4, p 026 (2017)
One of the most fundamental properties of an interacting electron system is its frequency- and wave-vector-dependent density response function, $\chi({\bf q},\omega)$. The imaginary part, $\chi''({\bf q},\omega)$, defines the fundamental bosonic char
Externí odkaz:
https://doaj.org/article/4fac85ff20454469a79d4c03b7d45141
Publikováno v:
Ultrafast Phenomena and Nanophotonics XXV.
Photoexcitation by an intense laser pulse can alter the free energy landscape of a solid so that it can access states of matter that do not normally exist in thermal equilibrium. Discoveries of such light-induced states are often found in materials t