Optical Properties of Two-Dimensional Organic Conductors: Signatures of Charge Ordering and Correlation Effects

2004 ◽  
Vol 104 (11) ◽  
pp. 5689-5716 ◽  
Author(s):  
Martin Dressel ◽  
Natalia Drichko
Keyword(s):  
Optical Properties ◽  
Organic Conductors ◽  
Charge Ordering ◽  
Two Dimensional ◽  
Correlation Effects

Superconducting and charge ordering phases of two-dimensional organic conductors

2006 ◽  
Vol 142 (3-4) ◽  
pp. 535-538 ◽  
Author(s):  
R. Kondo ◽  
M. Higa ◽  
S. Kagoshima
Keyword(s):  
Organic Conductors ◽  
Charge Ordering ◽  
Two Dimensional

Charge ordering in non-dimerized BEDT-TTF based organic conductors: 13C-NMR experiments

2002 ◽  
Vol 12 (9) ◽  
pp. 201-204
Author(s):  
T. Takahashi ◽  
R. Chiba ◽  
Y. Takano ◽  
Y. Kubo ◽  
K. Hiraki ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Charge Order ◽  
Organic Conductors ◽  
Charge Ordering ◽  
Metallic State ◽  
Two Dimensional ◽  
Charge Disproportionation ◽  
Nmr Techniques ◽  
Mi Transition ◽  
C Nmr

Experimental evidences of the charge ordering with the use of 13C-NMR techniques in various organic conductors are reviewed. In the insulating states of two-dimensional BEDT-TTF salts, a-I, and 8-RbZn(SCN)4, the formation of charge stripes perpendicular to molecular stacks are confiied. Charge disproportionation is estimated as 0.8:0.2 in the latter and more in the former. It is also observed that charge disproportionation already develops well above the MI transition temperature while no long-range charge order is stabilized. This seems to require a serious reconsideration of the transport properties in the `metallic' state.

scholarly journals Polymorphic gallium for active resonance tuning in photonic nanostructures: from bulk gallium to two-dimensional (2D) gallenene

Nanophotonics ◽  
2020 ◽  
Vol 9 (14) ◽  
pp. 4233-4252
Author(s):  
Yael Gutiérrez ◽  
Pablo García-Fernández ◽  
Javier Junquera ◽  
April S. Brown ◽  
Fernando Moreno ◽  
...  
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Phase Change Materials ◽  
Two Dimensional ◽  
Active Materials ◽  
Promising Candidate ◽  
Plasmonic Structures ◽  
Resonance Tuning ◽  
The Many ◽  
Optical Behavior

AbstractReconfigurable plasmonics is driving an extensive quest for active materials that can support a controllable modulation of their optical properties for dynamically tunable plasmonic structures. Here, polymorphic gallium (Ga) is demonstrated to be a very promising candidate for adaptive plasmonics and reconfigurable photonics applications. The Ga sp-metal is widely known as a liquid metal at room temperature. In addition to the many other compelling attributes of nanostructured Ga, including minimal oxidation and biocompatibility, its six phases have varying degrees of metallic character, providing a wide gamut of electrical conductivity and optical behavior tunability. Here, the dielectric function of the several Ga phases is introduced and correlated with their respective electronic structures. The key conditions for optimal optical modulation and switching for each Ga phase are evaluated. Additionally, we provide a comparison of Ga with other more common phase-change materials, showing better performance of Ga at optical frequencies. Furthermore, we first report, to the best of our knowledge, the optical properties of liquid Ga in the terahertz (THz) range showing its broad plasmonic tunability from ultraviolet to visible-infrared and down to the THz regime. Finally, we provide both computational and experimental evidence of extension of Ga polymorphism to bidimensional two-dimensional (2D) gallenene, paving the way to new bidimensional reconfigurable plasmonic platforms.

Structural, electronic, and optical properties of two-dimensional hafnium monoxide nanosheets

2021 ◽  
Vol 130 ◽  
pp. 114690
Author(s):  
Xinxin Deng ◽  
Bingcheng Luo ◽  
Zili Zhang ◽  
Changchun Zhao ◽  
Mengjun Shi ◽  
...  
Keyword(s):  
Optical Properties ◽  
Two Dimensional ◽  
Electronic And Optical Properties

Auxetic, flexible, and strain-tunable two-dimensional th-AlN for photocatalytic visible light water splitting with anisotropic high carrier mobility

2021 ◽  
Vol 9 (14) ◽  
pp. 4971-4977
Author(s):  
Mehmet Emin Kilic ◽  
Kwang-Ryeol Lee
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Water Splitting ◽  
Carrier Mobility ◽  
Two Dimensional ◽  
Light Water ◽  
Photocatalytic Water Splitting ◽  
Electronic And Optical Properties ◽  
High Carrier Mobility ◽  
High Carrier

Tetrahexagonal AlN: a novel two-dimensional family for photocatalytic water splitting with exceptional mechanical, electronic, and optical properties.

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