Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2

C.P. Weber, M.G. Masten, T.C. Ogloza, B.S. Berggren, M.K.L. Man, K.M. Dani, J. Liu, Z. Mao, D.D. Klug, A.A. Adeleke, Y. Yao

Research output: Contribution to journal › Article

Abstract

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.
Original languageEnglish
JournalPhysical Review B
Volume98
Issue number15
DOIs
StatePublished - 2018

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Weber, C. P., Masten, M. G., Ogloza, T. C., Berggren, B. S., Man, M. K. L., Dani, K. M., ... Yao, Y. (2018). Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2. Physical Review B, 98(15). https://doi.org/10.1103/PhysRevB.98.155115
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. / Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2. In: Physical Review B. 2018 ; Vol. 98, No. 15.
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abstract = "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.",
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Weber, CP, Masten, MG, Ogloza, TC, Berggren, BS, Man, MKL, Dani, KM, Liu, J, Mao, Z, Klug, DD, Adeleke, AA & Yao, Y 2018, 'Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2', Physical Review B, vol. 98, no. 15. https://doi.org/10.1103/PhysRevB.98.155115

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 -

Weber CP, Masten MG, Ogloza TC, Berggren BS, Man MKL, Dani KM et al. Using coherent phonons for ultrafast control of the Dirac node of SrMnSb2. Physical Review B. 2018;98(15). https://doi.org/10.1103/PhysRevB.98.155115

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