Nanocrystals of diluted magnetic semiconductors: Model for magnetic polaron

1995 ◽  
Vol 51 (15) ◽  
pp. 9912-9916 ◽  
Author(s):  
A. K. Bhattacharjee
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Magnetic Polaron ◽  
Diluted Magnetic

Parameters of the magnetic polaron state in diluted magnetic semiconductors Cd-Mn-Te with low manganese concentration

1996 ◽  
Vol 54 (8) ◽  
pp. 5727-5731 ◽  
Author(s):  
I. A. Merkulov ◽  
G. R. Pozina ◽  
D. Coquillat ◽  
N. Paganotto ◽  
J. Siviniant ◽  
...  
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Manganese Concentration ◽  
Magnetic Polaron ◽  
Polaron State ◽  
Diluted Magnetic

Photoluminescence Studies of Diluted Magnetic Semiconductors Under Hydrostatic Pressure: Cd1−xMnxTe

1989 ◽  
Vol 161 ◽  
Author(s):  
Maneesha Prakash ◽  
Meera Chandrasekhar ◽  
H.R. Chandrasekhar ◽  
I. Miotkowski ◽  
A.K. Ramdas
Keyword(s):  
Hydrostatic Pressure ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Binding Energies ◽  
Magnetic Polaron ◽  
Photoluminescence Study ◽  
Bound Magnetic Polaron ◽  
Pressure Coefficients ◽  
Diluted Magnetic ◽  
Photoluminescence Studies

ABSTRACTWe present a photoluminescence study of the excitons and electron-to-acceptor (e-°) transitions in Cd1−xMnxTe (x = 0.05 and 0.15) under hydrostatic pressure at 15K. We investigate the changing magnetic and Coulombic binding energies of the e-° transition under pressure. We find that the e-° binding energy increases with pressure for x = 0.15 where the magnetic term due to the acceptor bound magnetic polaron is large, while it decreases for x = 0.05. We also obtain the pressure coefficients of the excitonic and acceptor related transitions.

Spin-Texture in Acceptor-Bound Magnetic Polarons

1986 ◽  
Vol 89 ◽  
Author(s):  
Eric D. Isaacs ◽  
Peter A. Wolff
Keyword(s):  
Neutron Scattering ◽  
Valence Band ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Magnetic Polaron ◽  
Spin Orbit ◽  
Bound Magnetic Polaron ◽  
Magnetic Polarons ◽  
Diluted Magnetic ◽  
Spin Texture

AbstractWe outline a theory of the acceptor-bound magnetic polaron in cubic diluted magnetic semiconductors that exhibits a nonuniform magnetization. Calculations show that the manganese spins have an overall z-alignment, but are canted in an azimuthally symmetric way from that direction. This is new phenomenon we call BMP spin-texture. Spin-texture results from valence band degeneracy, and the important spin-orbit effects associated with it. The possibility of studying BMP spin-texture via neutron scattering is discussed.

Bound magnetic polaron in Cr-based diluted magnetic semiconductors

1998 ◽  
Vol 58 (11) ◽  
pp. 7024-7034 ◽  
Author(s):  
M. Herbich ◽  
A. Twardowski ◽  
D. Scalbert ◽  
A. Petrou
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Magnetic Polaron ◽  
Bound Magnetic Polaron ◽  
Diluted Magnetic

What Limits Magnetic Polaron Energies in DMS?

1986 ◽  
Vol 89 ◽  
Author(s):  
P. A. Wolff ◽  
L. R. Ram-Mohan
Keyword(s):  
Optical Properties ◽  
Exchange Interaction ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Exchange Potential ◽  
Magnetic Polaron ◽  
Bound Magnetic Polaron ◽  
Magnetic Polarons ◽  
Spin Clusters ◽  
Diluted Magnetic

Magnetic polarons are ferromagnetic spin clusters created by the exchange interaction of a carrier spin (electron or hole) with localized spins imbedded in a semiconductor lattice. They were first studied in magnetic semiconductors [1]; more recently, there have been extensive investigations [2] of polaron behavior in diluted magnetic semiconductors (DMS), such as Cd1−xMnxTe. DMS are favorable media for magnetic polaron studies because they have simple s-p bands and excellent optical properties. Two types of magnetic polarons have been identified in DMS - the bound magnetic polaron (BMP), whose carrier is localized by an impurity [3], and the free polaron (FP) consisting of a carrier trapped by its own, self-consistently-maintained, exchange potential [4].

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