Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Oszwaldowski, R."'
Autor:
Zhang, P., Norden, T., Pientka, J. M., Oszwałdowski, R., Najafi, A., Barman, B., Tsai, Y., Fan, W-C., Chou, W-C., Han, J. E., Žutić, I., McCombe, B. D., Petrou, A.
Spatially indirect Type-II band alignment in magnetically-doped quantum dot (QD) structures provides unexplored opportunities to control the magnetic interaction between carrier wavefunction in the QD and magnetic impurities. Unlike the extensively s
Externí odkaz:
http://arxiv.org/abs/1801.05090
Semiconductor quantum dots (QDs) doped with magnetic impurities have been a focus of continuous research for a couple of decades. A significant effort has been devoted to studies of magnetic polarons (MP) in these nanostructures. These collective sta
Externí odkaz:
http://arxiv.org/abs/1707.01565
Autor:
Souma, S., Chen, L., Oszwałdowski, R., Sato, T., Matsukura, F., Dietl, T., Ohno, H., Takahashi, T.
Recently, Kobayashi et al. (arXiv:1608.07718; ref. 1) have proposed an alternative interpretation of our angle-resolved photoemission spectroscopy (ARPES) results for the dilute ferromagnetic semiconductor (Ga,Mn)As. They claim that our ARPES data [S
Externí odkaz:
http://arxiv.org/abs/1609.01047
Autor:
Souma, S., Chen, L., Oszwaldowski, R., Sato, T., Matsukura, F., Dietl, T., Ohno, H., Takahashi, T.
Publikováno v:
Scientific Reports 6, 27266 (2016)
Carrier-induced nature of ferromagnetism in a ferromagnetic semiconductor, (Ga,Mn)As, offers a great opportunity to observe novel spin-related phenomena as well as to demonstrate new functionalities of spintronic devices. Here, we report on low-tempe
Externí odkaz:
http://arxiv.org/abs/1606.02047
Autor:
Barman, B., Oszwałdowski, R., Schweidenback, L., Russ, A. H., Pientka, J. M., Tsai, Y., Chou, W-C., Fan, W. C., Murphy, J. R., Cartwright, A. N., Sellers, I. R., Petukhov, A. G., Žutić, I., McCombe, B. D., Petrou, A.
Publikováno v:
PhysRevB.92.035430(2015)
We used continuous wave photoluminescence (cw-PL) and time resolved photoluminescence (TR-PL) spectroscopy to compare the properties of magnetic polarons (MP) in two related spatially indirect II-VI epitaxially grown quantum dot systems. In the ZnTe/
Externí odkaz:
http://arxiv.org/abs/1510.04376
In magnetically-doped quantum dots changing the carrier occupancy, from open to closed shells, leads to qualitatively different forms of carrier-mediated magnetic ordering. While it is common to study such nanoscale magnets within a mean field approx
Externí odkaz:
http://arxiv.org/abs/1509.05068
Publikováno v:
Phys. Rev. B 86, 201408(R) (2012)
The interplay of confinement and Coulomb interactions in quantum dots can lead to strongly correlated phases differing qualitatively from the Fermi liquid behavior. We explore how the presence of magnetic impurities in quantum dots can provide additi
Externí odkaz:
http://arxiv.org/abs/1210.6422
Publikováno v:
Phys. Rev. B 86, 161403(R) (2012)
We propose a model of magnetic polaron formation in semiconductor quantum dots doped with magnetic ions. A wetting layer serves as a reservoir of photo-generated holes, which can be trapped by the adjacent quantum dots. For certain hole densities, th
Externí odkaz:
http://arxiv.org/abs/1210.1162
Publikováno v:
Phys. Rev. Lett. 106, 177201 (2011)
Similar to atoms and nuclei, semiconductor quantum dots exhibit formation of shells. Predictions of magnetic behavior of the dots are often based on the shell occupancies. Thus, closed-shell quantum dots are assumed to be inherently nonmagnetic. Here
Externí odkaz:
http://arxiv.org/abs/1106.2346
Autor:
Sellers, I. R., Oszwaldowski, R., Whiteside, V. R., Eginligil, M., Petrou, A., Zutic, I., Chou, W-C., Fan, W. C., Petukhov, A. G., McCombe, B. D.
We present evidence of magnetic ordering in type-II (Zn, Mn) Te quantum dots. This ordering is attributed to the formation of bound magnetic polarons caused by the exchange interaction between the strongly localized holes and Mn within the dots. In o
Externí odkaz:
http://arxiv.org/abs/0912.0138