The electronic properties of WSe2 comprise a huge spin-orbit coupling, a wide direct band gap, and especially a strong anisotropic lifting of the degeneracy of the valley degree of freedom in a magnetic field. We study ballistic electron transport through single or double junctions on monolayer WSe2 in the presence of spin M-s and valley M-v Zeeman fields and of an electric potential U. The conductance vs. the field M-s or M-v decreases in a fluctuating manner. For a single junction the spin P-s and valley P-v polarizations rise with M = M-v = 2M(s), reach a value of more than 70%, and become perfect above U approximate to 90meV while for a double junction this change can occur for U approximate to 50meV and M >= 10meV. Pv increases with U and both polarizations oscillate with the junction width. The results may render WSe2 a promising candidate for new spintronic and valleytronic devices.
Source:
Europhysics Letters, 2017, 118, 1
Publisher:
Epl Association, European Physical Society, Mulhouse
TY - JOUR
AU - Tahir, Muhammad
AU - Krstajić, Predrag
AU - Vasilopoulos, Panagiotis
PY - 2017
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2146
AB - The electronic properties of WSe2 comprise a huge spin-orbit coupling, a wide direct band gap, and especially a strong anisotropic lifting of the degeneracy of the valley degree of freedom in a magnetic field. We study ballistic electron transport through single or double junctions on monolayer WSe2 in the presence of spin M-s and valley M-v Zeeman fields and of an electric potential U. The conductance vs. the field M-s or M-v decreases in a fluctuating manner. For a single junction the spin P-s and valley P-v polarizations rise with M = M-v = 2M(s), reach a value of more than 70%, and become perfect above U approximate to 90meV while for a double junction this change can occur for U approximate to 50meV and M >= 10meV. Pv increases with U and both polarizations oscillate with the junction width. The results may render WSe2 a promising candidate for new spintronic and valleytronic devices.
PB - Epl Association, European Physical Society, Mulhouse
T2 - Europhysics Letters
T1 - Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2
VL - 118
IS - 1
DO - 10.1209/0295-5075/118/17001
ER -
@article{
author = "Tahir, Muhammad and Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2017",
abstract = "The electronic properties of WSe2 comprise a huge spin-orbit coupling, a wide direct band gap, and especially a strong anisotropic lifting of the degeneracy of the valley degree of freedom in a magnetic field. We study ballistic electron transport through single or double junctions on monolayer WSe2 in the presence of spin M-s and valley M-v Zeeman fields and of an electric potential U. The conductance vs. the field M-s or M-v decreases in a fluctuating manner. For a single junction the spin P-s and valley P-v polarizations rise with M = M-v = 2M(s), reach a value of more than 70%, and become perfect above U approximate to 90meV while for a double junction this change can occur for U approximate to 50meV and M >= 10meV. Pv increases with U and both polarizations oscillate with the junction width. The results may render WSe2 a promising candidate for new spintronic and valleytronic devices.",
publisher = "Epl Association, European Physical Society, Mulhouse",
journal = "Europhysics Letters",
title = "Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2",
volume = "118",
number = "1",
doi = "10.1209/0295-5075/118/17001"
}
Tahir, M., Krstajić, P.,& Vasilopoulos, P.. (2017). Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2. in Europhysics Letters
Epl Association, European Physical Society, Mulhouse., 118(1).
https://doi.org/10.1209/0295-5075/118/17001
Tahir M, Krstajić P, Vasilopoulos P. Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2. in Europhysics Letters. 2017;118(1).
doi:10.1209/0295-5075/118/17001 .
Tahir, Muhammad, Krstajić, Predrag, Vasilopoulos, Panagiotis, "Zeeman- and electric-field control of spin- and valley-polarized transport through biased magnetic junctions on WSe2" in Europhysics Letters, 118, no. 1 (2017),
https://doi.org/10.1209/0295-5075/118/17001 . .
