TY  - JOUR
AU  - Tahir, Muhammad
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2418
AB  - We investigate quantum transport in a bilayer WSe2 in the presence of an external potential V and interlayer coupling. The dc and ac conductivities are evaluated in the framework of linear response theory. As functions of the Fermi energy, the dc ones exhibit a nonmonotonic behavior with a flat region in the band gap. A deep local minimum is visible in spin-Hall conductivity near the top of the valence band as a consequence of a large valence band splitting. On the other hand, the ac spin- and valley-Hall conductivities, as functions of the frequency, show two opposite peaks near the top of the valence band. The spin-Hall conductivity exhibits a minimum value at V = 0 whereas the valley-Hall conductivity decreases monotonically upon varying V from negative to positive values. Furthermore, we evaluate the power absorption spectrum and assess its dependence on the spin and valley degrees of freedom. The results are pertinent to the development of electrically controlled spintronic and valleytronic devices based on bilayer WSe2 and other group VI semiconductors.
PB  - American Physical Society (APS)
T2  - Physical Review B
T1  - Electrically controlled dc and ac transport in bilayer WSe2
VL  - 98
IS  - 7
SP  - 075429
DO  - 10.1103/PhysRevB.98.075429
ER  - 

@article{
author = "Tahir, Muhammad and Krstajić, Predrag and Vasilopoulos, Panagiotis",
year = "2018",
abstract = "We investigate quantum transport in a bilayer WSe2 in the presence of an external potential V and interlayer coupling. The dc and ac conductivities are evaluated in the framework of linear response theory. As functions of the Fermi energy, the dc ones exhibit a nonmonotonic behavior with a flat region in the band gap. A deep local minimum is visible in spin-Hall conductivity near the top of the valence band as a consequence of a large valence band splitting. On the other hand, the ac spin- and valley-Hall conductivities, as functions of the frequency, show two opposite peaks near the top of the valence band. The spin-Hall conductivity exhibits a minimum value at V = 0 whereas the valley-Hall conductivity decreases monotonically upon varying V from negative to positive values. Furthermore, we evaluate the power absorption spectrum and assess its dependence on the spin and valley degrees of freedom. The results are pertinent to the development of electrically controlled spintronic and valleytronic devices based on bilayer WSe2 and other group VI semiconductors.",
publisher = "American Physical Society (APS)",
journal = "Physical Review B",
title = "Electrically controlled dc and ac transport in bilayer WSe2",
volume = "98",
number = "7",
pages = "075429",
doi = "10.1103/PhysRevB.98.075429"
}

Tahir, M., Krstajić, P.,& Vasilopoulos, P.. (2018). Electrically controlled dc and ac transport in bilayer WSe2. in Physical Review B
American Physical Society (APS)., 98(7), 075429.
https://doi.org/10.1103/PhysRevB.98.075429

Tahir M, Krstajić P, Vasilopoulos P. Electrically controlled dc and ac transport in bilayer WSe2. in Physical Review B. 2018;98(7):075429.
doi:10.1103/PhysRevB.98.075429 .

Tahir, Muhammad, Krstajić, Predrag, Vasilopoulos, Panagiotis, "Electrically controlled dc and ac transport in bilayer WSe2" in Physical Review B, 98, no. 7 (2018):075429,
https://doi.org/10.1103/PhysRevB.98.075429 . .

TY  - JOUR
AU  - Krstajić, Predrag
AU  - Vasilopoulos, Panagiotis
AU  - Tahir, Muhammad
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1842
AB  - We investigate dc and ac transport in a monolayer of MoS2 in the presence of an effective mass asymmetry, a momentum-dependent term, and an out-of plane or in-plane Zeeman term. Analytical results are presented for both dc and ac conductivities in the framework of linear response theory. We show that the spin-Hall conductivity exhibits a strong dependence on the strength of the spin-orbit interaction while both spin-and valley-Hall conductivities show a very weak dependence on the temperature. The sum of the well separated spin-up and spin-down components of the diffusive dc longitudinal conductivity is linear in the electron concentration though the Fermi level is a nonmonotonic function of it. Further, we evaluate the power absorption spectrum and assess its dependence on the spin and valley degrees of freedom as well as on the scattering which is essential at low frequencies.
PB  - Amer Physical Soc, College Pk
T2  - Physical Review B
T1  - Spin- and valley-polarized transport in a monolayer of MoS2
VL  - 94
IS  - 8
SP  - 085413
DO  - 10.1103/PhysRevB.94.085413
ER  - 

@article{
author = "Krstajić, Predrag and Vasilopoulos, Panagiotis and Tahir, Muhammad",
year = "2016",
abstract = "We investigate dc and ac transport in a monolayer of MoS2 in the presence of an effective mass asymmetry, a momentum-dependent term, and an out-of plane or in-plane Zeeman term. Analytical results are presented for both dc and ac conductivities in the framework of linear response theory. We show that the spin-Hall conductivity exhibits a strong dependence on the strength of the spin-orbit interaction while both spin-and valley-Hall conductivities show a very weak dependence on the temperature. The sum of the well separated spin-up and spin-down components of the diffusive dc longitudinal conductivity is linear in the electron concentration though the Fermi level is a nonmonotonic function of it. Further, we evaluate the power absorption spectrum and assess its dependence on the spin and valley degrees of freedom as well as on the scattering which is essential at low frequencies.",
publisher = "Amer Physical Soc, College Pk",
journal = "Physical Review B",
title = "Spin- and valley-polarized transport in a monolayer of MoS2",
volume = "94",
number = "8",
pages = "085413",
doi = "10.1103/PhysRevB.94.085413"
}

Krstajić, P., Vasilopoulos, P.,& Tahir, M.. (2016). Spin- and valley-polarized transport in a monolayer of MoS2. in Physical Review B
Amer Physical Soc, College Pk., 94(8), 085413.
https://doi.org/10.1103/PhysRevB.94.085413

Krstajić P, Vasilopoulos P, Tahir M. Spin- and valley-polarized transport in a monolayer of MoS2. in Physical Review B. 2016;94(8):085413.
doi:10.1103/PhysRevB.94.085413 .

Krstajić, Predrag, Vasilopoulos, Panagiotis, Tahir, Muhammad, "Spin- and valley-polarized transport in a monolayer of MoS2" in Physical Review B, 94, no. 8 (2016):085413,
https://doi.org/10.1103/PhysRevB.94.085413 . .