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A. Murayama
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Journal Articles

Power-dependent spin amplification in (In, Ga)As/GaAs quantum well via Pauli blocking by tunnel-coupled quantum dot ensembles

S. L. Chen, T. Kiba, X. J. Yang, J. Takayama, A. Murayama
Journal: Applied Physics Letters
Appl. Phys. Lett. 108, 152103 (2016)
https://doi.org/10.1063/1.4945740
Published: April 2016
View article titled, Power-dependent spin amplification in (In, Ga)As/GaAs quantum well via Pauli blocking by tunnel-coupled quantum dot ensembles
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Journal Articles

Temperature-dependent spin injection dynamics in InGaAs/GaAs quantum well-dot tunnel-coupled nanostructures

S. L. Chen, T. Kiba, X. J. Yang, J. Takayama, A. Murayama
Journal: Journal of Applied Physics
J. Appl. Phys. 119, 115701 (2016)
https://doi.org/10.1063/1.4944039
Published: March 2016
View article titled, Temperature-dependent spin injection dynamics in InGaAs/GaAs quantum well-dot tunnel-coupled nanostructures
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Journal Articles

Time-resolved measurements of Cooper-pair radiative recombination in InAs quantum dots

S. S. Mou, H. Irie (入江), Y. Asano (浅野), K. Akahane (赤羽), H. Nakajima (中島), H. Kumano (熊野), M. Sasaki (佐々木), A. Murayama (村山), I. Suemune (末宗)
Journal: Journal of Applied Physics
J. Appl. Phys. 118, 073102 (2015)
https://doi.org/10.1063/1.4928621
Published: August 2015
View article titled, Time-resolved measurements of Cooper-pair radiative recombination in InAs quantum dots
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Journal Articles

Size dependence of electron spin dephasing in InGaAs quantum dots

Y. Q. Huang, Y. Puttisong, I. A. Buyanova, X. J. Yang, A. Subagyo, K. Sueoka, A. Murayama, W. M. Chen
Journal: Applied Physics Letters
Appl. Phys. Lett. 106, 093109 (2015)
https://doi.org/10.1063/1.4914084
Published: March 2015
View article titled, Size dependence of electron spin dephasing in InGaAs quantum dots
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Includes: Supplementary data
Journal Articles

Anomalous spectral dependence of optical polarization and its impact on spin detection in InGaAs/GaAs quantum dots

Y. Puttisong, Y. Q. Huang, I. A. Buyanova, X. J. Yang, A. Subagyo, K. Sueoka, A. Murayama, W. M. Chen
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 132106 (2014)
https://doi.org/10.1063/1.4897306
Published: October 2014
View article titled, Anomalous spectral dependence of optical polarization and its impact on spin detection in InGaAs/GaAs quantum dots
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Journal Articles

Antiferromagnetic interaction in coupled CdSe/ZnMnSe quantum dot structures

D. Dagnelund, Q. J. Ren, I. A. Buyanova, A. Murayama, W. M. Chen
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 052405 (2012)
https://doi.org/10.1063/1.4739852
Published: August 2012
View article titled, Antiferromagnetic interaction in coupled CdSe/ZnMnSe quantum dot structures
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Journal Articles

Dominant factors limiting efficiency of optical spin detection in ZnO-based materials

W. M. Chen, I. A. Buyanova, A. Murayama, T. Furuta, Y. Oka, D. P. Norton, S. J. Pearton, A. Osinsky, J. W. Dong
Journal: Applied Physics Letters
Appl. Phys. Lett. 92, 092103 (2008)
https://doi.org/10.1063/1.2885732
Published: March 2008
View article titled, Dominant factors limiting efficiency of optical spin detection in ZnO-based materials
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Journal Articles

Direct observation of relaxation dynamics of spin-polarized electrons excited at a higher-energy spin-split subband in a diluted magnetic semiconductor quantum well

K. Saito, J. H. Park, I. Souma, Y. Oka, A. Murayama
Journal: Applied Physics Letters
Appl. Phys. Lett. 90, 262111 (2007)
https://doi.org/10.1063/1.2753091
Published: June 2007
View article titled, Direct observation of relaxation dynamics of spin-polarized electrons excited at a higher-energy spin-split subband in a diluted magnetic semiconductor quantum well
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Journal Articles

Recombination and Spin Dynamics of Excitons in III‐V/II‐VI:Mn Heterovalent Double Quantum Wells

A. A. Toropov, Ya. V. Terent’ev, S. V. Ivanov, P. S. Kop’ev, T. Koyama, K. Nishibayashi, A. Murayama, Y. Oka
Journal: AIP Conference Proceedings
AIP Conf. Proc. 893, 1299–1300 (2007)
https://doi.org/10.1063/1.2730378
Published: April 2007
View article titled, Recombination and Spin Dynamics of Excitons in III‐V/II‐VI:Mn Heterovalent Double Quantum Wells
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Journal Articles

Spin Dynamics of Type‐II Excitons in Diluted Magnetic Double Quantum Wells

T. Koyama, K. Nishibayashi, A. Murayama, Y. Oka, A. A. Toropov, I. A. Buyanova, W. M. Chen
Journal: AIP Conference Proceedings
AIP Conf. Proc. 893, 465–466 (2007)
https://doi.org/10.1063/1.2729967
Published: April 2007
View article titled, Spin Dynamics of Type‐II Excitons in Diluted Magnetic Double Quantum Wells
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Journal Articles

Ultrafast Spin Relaxation and Dynamics of Carriers in Diluted Magnetic Semiconductor Quantum Wells

K. Saito, K. Nishibayashi, I. Souma, A. Murayama, Y. Oka
Journal: AIP Conference Proceedings
AIP Conf. Proc. 893, 1169–1170 (2007)
https://doi.org/10.1063/1.2730313
Published: April 2007
View article titled, Ultrafast Spin Relaxation and Dynamics of Carriers in Diluted Magnetic Semiconductor Quantum Wells
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Journal Articles

Magnetic-field-dependent type-II transition induced by resonant electron tunneling from a diluted magnetic semiconductor quantum well into self-assembled quantum dots

A. Murayama, T. Asahina, K. Nishibayashi, I. Souma, Y. Oka
Journal: Journal of Applied Physics
J. Appl. Phys. 100, 084327 (2006)
https://doi.org/10.1063/1.2360779
Published: October 2006
View article titled, Magnetic-field-dependent type-II transition induced by resonant electron tunneling from a diluted magnetic semiconductor quantum well into self-assembled quantum dots
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Journal Articles

Spin dynamics in a diluted magnetic semiconductor quantum well studied by pump-probe absorption spectroscopy: Magnetic-field-induced suppression of electron-spin relaxation

A. Murayama, K. Seo, K. Nishibayashi, I. Souma, Y. Oka
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 261105 (2006)
https://doi.org/10.1063/1.2216111
Published: June 2006
View article titled, Spin dynamics in a diluted magnetic semiconductor quantum well studied by pump-probe absorption spectroscopy: Magnetic-field-induced suppression of electron-spin relaxation
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Journal Articles

Dynamical spin separation induced by spin-dependent type-II band alignment in a diluted magnetic double quantum well

T. Koyama, K. Kayanuma, I. Souma, A. Murayama, Y. Oka
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 212106 (2006)
https://doi.org/10.1063/1.2207488
Published: May 2006
View article titled, Dynamical spin separation induced by spin-dependent type-II band alignment in a diluted magnetic double quantum well
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Journal Articles

Spin-injection dynamics in a magnetic double quantum well studied by pump-probe absorption spectroscopy

K. Nishibayashi, I. Souma, A. Murayama, Y. Oka
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 211108 (2006)
https://doi.org/10.1063/1.2206873
Published: May 2006
View article titled, Spin-injection dynamics in a magnetic double quantum well studied by pump-probe absorption spectroscopy
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Journal Articles

Nanoscale magnet for semiconductor spintronics

A. Murayama, M. Sakuma
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 122504 (2006)
https://doi.org/10.1063/1.2186984
Published: March 2006
View article titled, Nanoscale magnet for semiconductor spintronics
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Journal Articles

Efficient spin injection into self-assembled quantum dots via LO-phonon-assisted resonant electron tunneling

A. Murayama, T. Asahina, K. Nishibayashi, I. Souma, Y. Oka
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 023114 (2006)
https://doi.org/10.1063/1.2164387
Published: January 2006
View article titled, Efficient spin injection into self-assembled quantum dots via LO-phonon-assisted resonant electron tunneling
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Journal Articles

Efficient spin relaxation in InGaN ∕ GaN and InGaN ∕ GaMnN quantum wells: An obstacle to spin detection

W. M. Chen, I. A. Buyanova, K. Nishibayashi, K. Kayanuma, K. Seo, A. Murayama, Y. Oka, G. Thaler, R. Frazier, C. R. Abernathy, F. Ren, S. J. Pearton, C.-C. Pan, G.-T. Chen, J.-I. Chyi
Journal: Applied Physics Letters
Appl. Phys. Lett. 87, 192107 (2005)
https://doi.org/10.1063/1.2125125
Published: November 2005
View article titled, Efficient spin relaxation in InGaN ∕ GaN and InGaN ∕ GaMnN quantum wells: An obstacle to spin detection
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Journal Articles

Excitonic Spin Dynamics in Coupled Quantum Dots of Diluted Magnetic Semiconductors

A. Murayama, A. Uetake, I. Souma, K. Kayanuma, T. Asahina, K. Hyomi, T. Tomita, Y. Oka
Journal: AIP Conference Proceedings
AIP Conf. Proc. 772, 1389–1390 (2005)
https://doi.org/10.1063/1.1994632
Published: June 2005
View article titled, Excitonic Spin Dynamics in Coupled Quantum Dots of Diluted Magnetic Semiconductors
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Journal Articles

Optical Study of Spin Injection Dynamics in Double Quantum Wells of II‐VI Diluted Magnetic Semiconductors

K. Kayanuma, T. Tomita, A. Murayama, Y. Oka, A. A. Toropov, S. V. Ivanov, I. A. Buyanova, W. M. Chen
Journal: AIP Conference Proceedings
AIP Conf. Proc. 772, 1387–1388 (2005)
https://doi.org/10.1063/1.1994631
Published: June 2005
View article titled, Optical Study of Spin Injection Dynamics in Double Quantum Wells of II‐VI Diluted Magnetic Semiconductors
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