Abstract
Original language | English |
---|---|
Journal | Physical Review B |
Volume | 98 |
Issue number | 15 |
DOIs | |
State | Published - 2018 |
Fingerprint
Cite this
}
Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2. / Weber, C.P.; Masten, M.G.; Ogloza, T.C.; Berggren, B.S.; Man, M.K.L.; Dani, K.M.; Liu, J.; Mao, Z.; Klug, D.D.; Adeleke, A.A.; Yao, Y.
In: Physical Review B, Vol. 98, No. 15, 2018.Research output: Contribution to journal › Article
TY - JOUR
T1 - Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2
AU - Weber, C.P.
AU - Masten, M.G.
AU - Ogloza, T.C.
AU - Berggren, B.S.
AU - Man, M.K.L.
AU - Dani, K.M.
AU - Liu, J.
AU - Mao, Z.
AU - Klug, D.D.
AU - Adeleke, A.A.
AU - Yao, Y.
N1 - cited By 0
PY - 2018
Y1 - 2018
N2 - SrMnSb2 is a candidate Dirac semimetal whose electrons near the Y point have the linear dispersion and low mass of a Dirac cone. Here we demonstrate that ultrafast, 800-nm optical pulses can launch coherent phonon oscillations in Sr0.94Mn0.92Sb2, particularly an Ag mode at 4.4 THz. Through first-principles calculations of the electronic and phononic structure of SrMnSb2, we show that high-amplitude oscillations of this mode would displace the atoms in a way that transiently opens and closes a gap at the node of the Dirac cone. The ability to control the nodal gap on a subpicosecond timescale could create opportunities for the design and manipulation of Dirac fermions. \ 2018 American Physical Society.
AB - SrMnSb2 is a candidate Dirac semimetal whose electrons near the Y point have the linear dispersion and low mass of a Dirac cone. Here we demonstrate that ultrafast, 800-nm optical pulses can launch coherent phonon oscillations in Sr0.94Mn0.92Sb2, particularly an Ag mode at 4.4 THz. Through first-principles calculations of the electronic and phononic structure of SrMnSb2, we show that high-amplitude oscillations of this mode would displace the atoms in a way that transiently opens and closes a gap at the node of the Dirac cone. The ability to control the nodal gap on a subpicosecond timescale could create opportunities for the design and manipulation of Dirac fermions. \ 2018 American Physical Society.
U2 - 10.1103/PhysRevB.98.155115
DO - 10.1103/PhysRevB.98.155115
M3 - Article
VL - 98
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 15
ER -