Zobrazeno 1 - 10
of 366
pro vyhledávání: '"Boukari, H"'
Two electrons in a quantum dot (QD) can form triplet states. We analyze the exchange coupling of the triplet states of the negatively charged exciton in a QD (X$^-$, two electrons and one hole) with the spin of a magnetic atom (Mn). Two techniques ar
Externí odkaz:
http://arxiv.org/abs/2304.02445
Autor:
Velez-Fort, E., Mallet, P., Boukari, H., Marty, A., Vergnaud, C., Bonell, F., Jamet, M., Veuillen, J-Y.
We have analyzed by means of scanning tunneling microscopy and spectroscopy the atomic and electronic structure of monolayers of 1T-VxPt1-xSe2 alloys grown by molecular beam epitaxy on epitaxial graphene substrates. We have focused on the composition
Externí odkaz:
http://arxiv.org/abs/2207.04755
We study the dynamics of the spin system that consist of a positively charged II-VI semiconductor quantum dot doped with a single Cr$^+$ ion. The resonant photoluminescence (PL) of the positively charged exciton coupled with the Cr$^+$ spin is used t
Externí odkaz:
http://arxiv.org/abs/2205.08122
Autor:
Tiwari, V., Arino, M., Gupta, S., Morita, M., Inoue, T., Caliste, D., Pochet, P., Boukari, H., Kuroda, S., Besombes, L.
Publikováno v:
Physical Review B Letter, 104, L041301 (2021)
We study a new diluted magnetic semiconductor system based on the spin of the ionized acceptor Cr$^+$. We show that the negatively charged Cr$^+$ ion, an excited state of the Cr in II-VI semiconductor, can be stable when inserted in a CdTe quantum do
Externí odkaz:
http://arxiv.org/abs/2107.03192
Autor:
Vélez-Fort, E., Hallal, A., Sant, R., Guillet, T., Abdukayumov, K., Marty, A., Vergnaud, C., Jacquot, J. -F., Jalabert, D., Fujii, J., Vobornik, I., Rault, J., Brookes, N. B., Longo, D., Ohresser, P., Ouerghi, A., Veuillen, J. -Y., Mallet, P., Boukari, H., Okuno, H., Chshiev, M., Bonell, F., Jamet, M.
We report on a novel material, namely two-dimensional (2D) V$_{1-x}$Pt$_x$Se$_2$ alloy, exhibiting simultaneously ferromagnetic order and Rashba spin-orbit coupling. While ferromagnetism is absent in 1T-VSe$_2$ due to the competition with the charge
Externí odkaz:
http://arxiv.org/abs/2105.10022
Autor:
Tiwari, V., Makita, K., Arino, M., Morita, M., Crozes, T., Bellet-Amalric, E., Kuroda, S., Boukari, H., Besombes, L.
We demonstrate radio-frequency tuning of the energy of individual CdTe/ZnTe quantum dots (QDs) by Surface Acoustic Waves (SAWs). Despite the very weak piezoelectric coefficient of ZnTe, SAW in the GHz range can be launched on a ZnTe surface using int
Externí odkaz:
http://arxiv.org/abs/2005.13254
Publikováno v:
Semiconductor Science and Technology 34, 063001 (2019)
We demonstrate that the spin of a Cr atom in a quantum dot (QD) can be controlled optically and we discuss the main properties of this single spin system. The photoluminescence of individual Cr-doped QDs and their evolution in magnetic field reveal a
Externí odkaz:
http://arxiv.org/abs/1911.08572
Autor:
Besombes, L., Boukari, H., Tiwari, V., Lafuente-Sampietro, A., Sunaga, M., Makita, K., Kuroda, S.
Publikováno v:
Physical Review B 99, 035309 (2019)
We study the emission of individual quantum dots in CdTe/ZnTe samples doped with a low concentration of Cr. In addition to dots with a photoluminescence (PL) split by the exchange interaction with a magnetic Cr atom, we observe another type of dots w
Externí odkaz:
http://arxiv.org/abs/1911.07671
Publikováno v:
Phys. Rev. B 101, 035305 (2020)
We analyse the influence of optically generated non-equilibrium phonons on the spin relaxation and effective spin temperature of an individual Cr atom inserted in a quantum dot. Using a three pulses pump-probe technique, we show that the spin relaxat
Externí odkaz:
http://arxiv.org/abs/1911.07639
Publikováno v:
Phys. Rev. B 95, 245308 (2017)
We analyze, through resonant photoluminescence, the spin dynamics of an individual magnetic atom (Mn) coupled to a hole in a semiconductor quantum dot. The hybrid Mn-hole spin and the positively charged exciton in a CdTe/ZnTe quantum dot forms an ens
Externí odkaz:
http://arxiv.org/abs/1703.09441