scholarly journals Optical conductivity of an interacting Weyl liquid in the collisionless regime

2017 ◽  
Vol 96 (15) ◽  
Author(s):  
Bitan Roy ◽  
Vladimir Juričić
Keyword(s):  
Optical Conductivity ◽  
Collisionless Regime

scholarly journals Propagation of shear stress in strongly interacting metallic Fermi liquids enhances transmission of terahertz radiation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
D. Valentinis ◽  
J. Zaanen ◽  
D. van der Marel
Keyword(s):  
Shear Stress ◽  
Terahertz Radiation ◽  
Fermi Liquid ◽  
Zero Sound ◽  
Strongly Correlated Electron ◽  
Correlated Electron Systems ◽  
Correlated Electron ◽  
Collisionless Regime ◽  
Propagating Shear ◽  
Mass Enhancement

AbstractA highlight of Fermi-liquid phenomenology, as explored in neutral $$^3$$ 3 He, is the observation that in the collisionless regime shear stress propagates as if one is dealing with the transverse phonon of a solid. The existence of this “transverse zero sound” requires that the quasiparticle mass enhancement exceeds a critical value. Could such a propagating shear stress also exist in strongly correlated electron systems? Despite some noticeable differences with the neutral case in the Galilean continuum, we arrive at the verdict that transverse zero sound should be generic for mass enhancement higher than 3. We present an experimental setup that should be exquisitely sensitive in this regard: the transmission of terahertz radiation through a thin slab of heavy-fermion material will be strongly enhanced at low temperature and accompanied by giant oscillations, which reflect the interference between light itself and the “material photon” being the actual manifestation of transverse zero sound in the charged Fermi liquid.

scholarly journals Broadband optical conductivity of the chiral multifold semimetal PdGa

2021 ◽  
Vol 103 (11) ◽  
Author(s):  
L. Z. Maulana ◽  
Z. Li ◽  
E. Uykur ◽  
K. Manna ◽  
S. Polatkan ◽  
...  
Keyword(s):  
Optical Conductivity

scholarly journals Linear behavior of the optical conductivity and incoherent charge transport in BaCoS2

2018 ◽  
Vol 2 (10) ◽  
Author(s):  
D. Santos-Cottin ◽  
Y. Klein ◽  
Ph. Werner ◽  
T. Miyake ◽  
L. de' Medici ◽  
...  
Keyword(s):  
Charge Transport ◽  
Optical Conductivity ◽  
Linear Behavior

scholarly journals Low-Energy Optical Conductivity of TaP: Comparison of Theory and Experiment

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 567
Author(s):  
Alexander Yaresko ◽  
Artem V. Pronin
Keyword(s):  
Experimental Data ◽  
Optical Conductivity ◽  
Low Energy ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Natural Explanation ◽  
Weyl Semimetal ◽  
Unintentional Doping ◽  
Mott Formula ◽  
Theory And Experiment

The ab-plane optical conductivity of the Weyl semimetal TaP is calculated from the band structure and compared to the experimental data. The overall agreement between theory and experiment is found to be best when the Fermi level is slightly (20 to 60 meV) shifted upwards in the calculations. This confirms a small unintentional doping of TaP, reported earlier, and allows a natural explanation of the strong low-energy (50 meV) peak seen in the experimental ab-plane optical conductivity: this peak originates from transitions between the almost parallel non-degenerate electronic bands split by spin-orbit coupling. The temperature evolution of the peak can be reasonably well reproduce by calculations using an analog of the Mott formula.

scholarly journals Local optical conductivity of bilayer graphene with kink potential

2021 ◽  
Vol 103 (12) ◽  
Author(s):  
Zhen-Bing Dai ◽  
Zhiqiang Li ◽  
Yan He
Keyword(s):  
Optical Conductivity ◽  
Bilayer Graphene

Ab initio computation of interband contribution to the optical conductivity of YBa2Cu3O7−x

1988 ◽  
Vol 153-155 ◽  
pp. 1239-1240
Author(s):  
S.T. Chui ◽  
Robert V. Kasowski ◽  
William Y. Hsu
Keyword(s):  
Ab Initio ◽  
Optical Conductivity ◽  
Ab Initio Computation

scholarly journals Substrate-tuning of correlated spin-orbit oxides revealed by optical conductivity calculations

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Bongjae Kim ◽  
Beom Hyun Kim ◽  
Kyoo Kim ◽  
B. I. Min
Keyword(s):  
Optical Conductivity ◽  
Spin Orbit

scholarly journals OPTICAL CONDUCTIVITY OF ONE-DIMENSIONAL NARROW-GAP SEMICONDUCTORS

2002 ◽  
Vol 16 (10) ◽  
pp. 1499-1509
Author(s):  
HYUN C. LEE
Keyword(s):  
Carbon Nanotubes ◽  
Optical Conductivity ◽  
Group Analysis ◽  
Thermal Fluctuations ◽  
Energy Scale ◽  
Narrow Gap ◽  
Crossover Temperature ◽  
Renormalization Group Analysis ◽  
One Dimensional ◽  
Narrow Gap Semiconductors

The optical conductivities of two one-dimensional narrow-gap semiconductors, anticrossing quantum Hall edge states and carbon nanotubes, are studied using bosonization method. A lowest order renormalization group analysis indicates that the bare band gap can be treated perturbatively at high frequency/temperature. At very low energy scale the optical conductivity is dominated by the excitonic contribution, while at temperature higher than a crossover temperature the excitonic features are eliminated by thermal fluctuations. In case of carbon nanotubes the crossover temperature scale is estimated to be 300 K.

Sign in / Sign up

Export Citation Format

Share Document