Search Results:　 1-20 of 322

Tsuchiya Takuma

… This operation, however, destroys the electron-spin coherence, and the spin polarization is limited to the vicinity of a ferromagnetic source electrode. … In this paper, we propose the use of dilute magnetic semiconductors to improve the coherence of spatially oscillating electron-spin polarization. …

J Phys Soc Jpn 81(9), 094706-094706-8, 2012-09-15

The Physical Society of Japan

Tomimoto Shinichi , Kawana Keisuke , Murakami Akira , Masumoto Yasuaki , 冨本 慎一 , 舛本 泰章

… We have experimentally studied the spin dynamics of excitons, electrons, and trions in charge-tunable InP/InGaP quantum dots (QDs) excited by picosecond resonant laser pulses by observing the time-resolved Kerr rotation. … In singly charged QDs, inversion of the spin polarization direction of doped electrons is found to be caused simply by variation in the pulse intensity, which is accompanied by an abrupt change of the spin coherence time. …

Physical review B 85(23), 235320, 2012-06-00

IR CrossRef

Tanamoto Tetsufumi , Ono Keiji , Nori Franco

… Quantum dots (QDs) are one of the promising candidates of interconnection between electromagnetic field and electrons in solid-state devices. … Dark states appear as a result of coherence between the electromagnetic fields and the discrete energy levels of the system. …

Jpn J Appl Phys 51(2), 02BJ07-02BJ07-5, 2012-02-25

The Japan Society of Applied Physics

Tanaka Yukio , Sato Masatoshi , Nagaosa Naoto

… Superconductivity is a phenomenon where the macroscopic quantum coherence appears due to the pairing of electrons. … As the band insulators are classified by topological indices into (i) conventional insulator, (ii) quantum Hall insulator, and (iii) topological insulator, also are the gapped superconductors. …

J Phys Soc Jpn 81(1), 011013-011013-34, 2012-01-15

The Physical Society of Japan

ISHI HAYASE Junko , EMA Kazuhiro , AKAHANE Kouichi , YAMAMOTO Naokatsu , SASAKI Masahide

日本磁気学会研究会資料 = Bulletin of Topical Symposium of the Magnetics Society of Japan 181, 1-6, 2011-12-07

References (11)

Yamamoto Yoshihisa

… The scheme of directly controlling electron spins trapped in semiconductor quantum dots or donor impurities as qubits using optical pulses has various advantages, such as the achievements of local excitation and fast operation, low power consumption, easy implementation of an interface with optical fiber communication networks, and the capability of transferring information to nuclear spins, which are expected to serve as quantum memories with a long coherence time. …

Jpn J Appl Phys 50(10), 100001-100001-15, 2011-10-25

The Japan Society of Applied Physics

Onose Yoshinori , Yoshimi Ryutaro , Tsukazaki Atsushi , Yuan Hongtao , Hidaka Takeaki , Iwasa Yoshihiro , Kawasaki Masashi , Tokura Yoshinori

… The sharp negative magnetoconductance due to the two-dimensional weak antilocalization has been observed and the phase coherence length is modulated with the gate voltage. …

Applied Physics Express 4(8), 083001-083001-3, 2011-08-25

The Japan Society of Applied Physics