TY - JOUR
T1 - A new route to negative refractive index from topological metals
AU - Hayata, Tomoya
N1 - Funding Information:
The author thanksY. Hidaka for useful comments. This work was supported by Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for Scientific Research (No: JP16J02240).
Publisher Copyright:
© 2018 The Author(s).
PY - 2018/8/1
Y1 - 2018/8/1
N2 - We discuss the possibility of realizing a negative refractive index inWeyl/Dirac semimetals.We consider the Maxwell equations with the plasma gap and chiral magnetic effect. By computing the dispersion relations of electromagnetic waves, we show that the refractive index becomes negative at frequencies (just) below the plasma frequency. We find that the axial anomaly, or, more specifically, the negative magnetoresistance (an electric current parallel to magnetic fields) opens a new route to realizing a negative refractive index. As an experimental implication, we compute the reflection and transmission coefficients of electromagnetic waves in a slab of Weyl/Dirac semimetals.
AB - We discuss the possibility of realizing a negative refractive index inWeyl/Dirac semimetals.We consider the Maxwell equations with the plasma gap and chiral magnetic effect. By computing the dispersion relations of electromagnetic waves, we show that the refractive index becomes negative at frequencies (just) below the plasma frequency. We find that the axial anomaly, or, more specifically, the negative magnetoresistance (an electric current parallel to magnetic fields) opens a new route to realizing a negative refractive index. As an experimental implication, we compute the reflection and transmission coefficients of electromagnetic waves in a slab of Weyl/Dirac semimetals.
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U2 - 10.1093/ptep/pty082
DO - 10.1093/ptep/pty082
M3 - Article
AN - SCOPUS:85055768400
VL - 2018
JO - Progress of Theoretical and Experimental Physics
JF - Progress of Theoretical and Experimental Physics
SN - 2050-3911
IS - 8
M1 - 83I01
ER -