Abstract
We study the quantum nonlinear Hall effect in two-dimensional (2D) materials with time-reversal symmetry. When only one mirror line exists, a transverse charge current occurs in the second-order response to an external electric field, as a result of the Berry curvature dipole in momentum space. Candidate 2D materials to observe this effect are two-dimensional transition metal dichalcogenides (TMDCs). First, we use an ab initio based tight-binding approach to demonstrate that monolayer Td-structure TMDCs exhibit a finite Berry curvature dipole. In the 1H and 1T′ phase of TMDCs, we show the emergence of a finite Berry curvature dipole with the application of strain and an electrical displacement field, respectively.
| Original language | English (US) |
|---|---|
| Article number | 121109 |
| Journal | Physical Review B |
| Volume | 98 |
| Issue number | 12 |
| DOIs | |
| State | Published - Sep 25 2018 |
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Berry curvature dipole current in the transition metal dichalcogenides family. / You, Jhih Shih; Fang, Shiang; Xu, Su Yang; Kaxiras, Efthimios; Low, Tony.
In: Physical Review B, Vol. 98, No. 12, 121109, 25.09.2018.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Berry curvature dipole current in the transition metal dichalcogenides family
AU - You, Jhih Shih
AU - Fang, Shiang
AU - Xu, Su Yang
AU - Kaxiras, Efthimios
AU - Low, Tony
PY - 2018/9/25
Y1 - 2018/9/25
N2 - We study the quantum nonlinear Hall effect in two-dimensional (2D) materials with time-reversal symmetry. When only one mirror line exists, a transverse charge current occurs in the second-order response to an external electric field, as a result of the Berry curvature dipole in momentum space. Candidate 2D materials to observe this effect are two-dimensional transition metal dichalcogenides (TMDCs). First, we use an ab initio based tight-binding approach to demonstrate that monolayer Td-structure TMDCs exhibit a finite Berry curvature dipole. In the 1H and 1T′ phase of TMDCs, we show the emergence of a finite Berry curvature dipole with the application of strain and an electrical displacement field, respectively.
AB - We study the quantum nonlinear Hall effect in two-dimensional (2D) materials with time-reversal symmetry. When only one mirror line exists, a transverse charge current occurs in the second-order response to an external electric field, as a result of the Berry curvature dipole in momentum space. Candidate 2D materials to observe this effect are two-dimensional transition metal dichalcogenides (TMDCs). First, we use an ab initio based tight-binding approach to demonstrate that monolayer Td-structure TMDCs exhibit a finite Berry curvature dipole. In the 1H and 1T′ phase of TMDCs, we show the emergence of a finite Berry curvature dipole with the application of strain and an electrical displacement field, respectively.
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U2 - 10.1103/PhysRevB.98.121109
DO - 10.1103/PhysRevB.98.121109
M3 - Article
VL - 98
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 12
M1 - 121109
ER -