Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Nikesh Koirala"'
Autor:
Yang Liu, Jean Besbas, Yi Wang, Pan He, Mengji Chen, Dapeng Zhu, Yang Wu, Jong Min Lee, Lan Wang, Jisoo Moon, Nikesh Koirala, Seongshik Oh, Hyunsoo Yang
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018)
Charge-to-spin conversion is a key theme of spintronics and its realization in topological materials is highly desired. Here, Liu et al. report spatial imaging of current-induced spin accumulation at the edges of Bi2Se3 and BiSbTeSe2 topological insu
Externí odkaz:
https://doaj.org/article/e8a44dc913b44e42a70c5a616dcd11ff
Autor:
Flavio Giorgianni, Enrica Chiadroni, Andrea Rovere, Mariangela Cestelli-Guidi, Andrea Perucchi, Marco Bellaveglia, Michele Castellano, Domenico Di Giovenale, Giampiero Di Pirro, Massimo Ferrario, Riccardo Pompili, Cristina Vaccarezza, Fabio Villa, Alessandro Cianchi, Andrea Mostacci, Massimo Petrarca, Matthew Brahlek, Nikesh Koirala, Seongshik Oh, Stefano Lupi
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016)
The terahertz response of topological insulator surface states, in which relativistic electrons are protected from backscattering, possesses potential optic and plasmonic applications. Here, the authors demonstrate a nonlinear absorption response of
Externí odkaz:
https://doaj.org/article/cbfc6e0a059c4b7ab5e209100d54990d
Autor:
Maryam Salehi, Matthew Brahlek, Nikesh Koirala, Jisoo Moon, Liang Wu, N. P. Armitage, Seongshik Oh
Publikováno v:
APL Materials, Vol 3, Iss 9, Pp 091101-091101-6 (2015)
Although over the past number of years there have been many advances in the materials aspects of topological insulators (TIs), one of the ongoing challenges with these materials is the protection of them against aging. In particular, the recent devel
Externí odkaz:
https://doaj.org/article/c683a7cda77c4945b6ae6e2c04eb67fe
Publikováno v:
Nano Letters. 18:820-826
Bi$_{2}$Se$_{3}$, one of the most widely studied topological insulators (TIs), is naturally electron-doped due to n-type native defects. However, many years of efforts to achieve p-type Bi$_{2}$Se$_{3}$ thin films have failed so far. Here, we provide
Autor:
Jekwan Lee, Nikesh Koirala, Young Geun Roh, Jun Park, Chihun In, Jisoo Moon, Moon-Ho Ham, Houk Jang, Sungwoo Hwang, Un Jeong Kim, Dohun Kim, Ji Ho Sung, Sung-Joon Park, Jong Hyun Ahn, Seongshik Oh, Sang-Soo Chee, Jae-Seok Kim, Sangwan Sim, Jae Bok Lee, Hong-Seok Lee, Minji Noh, Maryam Salehi, Hyunyong Choi, Moon-Ho Jo, Hyangsook Lee, Soonyoung Cha
Publikováno v:
ACS Photonics. 4:482-488
Broadband detection of mid-infrared (IR) photons extends to advanced optoelectronic applications such as imaging, sensing, and telecommunications. While graphene offers an attractive platform for broadband visible/IR photodetection, previous efforts
Publikováno v:
Physical Review B. 100
Despite many years of efforts, attempts to reach the quantum regime of topological surface states (TSS) on an electrically tunable topological insulator (TI) platform have so far failed on binary TI compounds such as $\mathrm{B}{\mathrm{i}}_{2}\mathr
Autor:
Jisoo, Moon, Jinwoong, Kim, Nikesh, Koirala, Maryam, Salehi, David, Vanderbilt, Seongshik, Oh
Publikováno v:
Nano letters. 19(6)
The anomalous Hall effect (AHE) is a nonlinear Hall effect appearing in magnetic conductors, boosted by internal magnetism beyond what is expected from the ordinary Hall effect. With the recent discovery of the quantized version of the AHE, the quant
The anomalous Hall effect (AHE) is a non-linear Hall effect appearing in magnetic conductors, boosted by internal magnetism beyond what is expected from the ordinary Hall effect. With the recent discovery of the quantized version of the AHE, the quan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1e92326194a88f101d54959643d3283
Autor:
Hyunyong Choi, Jisoo Moon, Moon-Ho Jo, Jun Park, Soonyoung Cha, Maryam Salehi, Nikesh Koirala, Ji Ho Sung, Sangwan Sim, Jaeseok Kim, Matthew Brahlek, Seung Min Lee, Seongshik Oh
Publikováno v:
ACS Photonics. 3:1426-1431
Plasmonics is a technology aiming at light modulation via collective charge oscillations. Topological insulators, where Dirac-like metallic surfaces coexist with normal insulating bulk, have recently attracted great attention in plasmonics due to the
Autor:
Matthew Brahlek, Stefano Lupi, Irene Lo Vecchio, Marta Autore, F. Giorgianni, Michele Ortolani, Fausto D’ Apuzzo, Seongshik Oh, Nikesh Koirala, Urlich Schade, Alessandra Di Gaspare
Publikováno v:
Nanoscale. 8:4667-4671
A 3D Topological Insulator (TI) is an intrinsically stratified electronic material characterized by an insulating bulk and Dirac free electrons at the interface with vacuum or another dielectric. In this paper, we investigate, through terahertz (THz)