336 citations · 381 across the 7 of their papers we have counts for
7 papers
Spin dynamics of positively charged excitons in Cr-doped quantum dots probed by resonant photoluminescence
V. Tiwari, M. Morita T. Inoue, S. Ando S. Kuroda +2
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…
A hole-Cr nano-magnet in a semiconductor quantum dot
V. Tiwari, M. Arino, S. Gupta +7
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…
Radio-frequency stress-induced modulation of CdTe/ZnTe quantum dots
V. Tiwari, K. Makita, M. Arino +6
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…
Optical control of an individual Cr spin in a semiconductor quantum dot
L. Besombes, H. Boukari, V. Tiwari +3
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…
Charge fluctuations of a Cr atom probed in the optical spectra of a quantum dot
L. Besombes, H. Boukari, V. Tiwari +4
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…
Influence of non-equilibrium phonons on the spin dynamics of a single Cr atom
V. Tiwari, K. Makita, M. Arino +4
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. Us…