Effect of Electron and Hole Doping on the Transport Characteristics of Chalcogenide Systems

In this review, we will discuss the effects of itinerant hole and disorder produced by substitutions on the magnetic states of polycrystalline delafossite oxide CuCrO 2 having a spin-3/2 antiferromagnetic triangular sublattice. First, we will show the effects of hole-doping by the substitution of nonmagnetic Mg 2+ for magnetic Cr 3+ on the physical properties of CuCrO 2, and will discuss the origin of nontrivial promotion of the 120° Néel state due to the coupling between the itinerant hole and localized spin. Next, we will show the effects of disorder introduced by the isovalent substitutions such as the nonmagnetic Ag + substitution for nonmagnetic Cu + and the nonmagnetic Al 3+ one for magnetic Cr 3+, and will discuss the possibility of appearance of unusual magnetic states such as spin liquid or spin nematic states.

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Hole-Doping of Fullerenes and Nanotubes by Way of Intercalation Chemistry

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.457 ◽

2007 ◽

Vol 7 (4) ◽

pp. 1221-1238 ◽

Cited By ~ 8

Author(s):

D. Claves

Keyword(s):

Hole Doping

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Effects of hole doping in FeSi: Photoemission study of FeSi1-xAlx

Physical Review B ◽

10.1103/physrevb.64.153106 ◽

2001 ◽

Vol 64 (15) ◽

Author(s):

T. Susaki ◽

K. Kobayashi ◽

A. Fujimori ◽

A. Ohno ◽

T. Tonogai ◽

...

Keyword(s):

Hole Doping ◽

Photoemission Study

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Investigation of different hole-doping routes in Cu(Ba,Sr)2(Yb1−xCax)Cu2O6+z

Physica C Superconductivity ◽

10.1016/s0921-4534(98)00019-7 ◽

1998 ◽

Vol 300 (1-2) ◽

pp. 17-25 ◽

Cited By ~ 17

Author(s):

K. Fujinami ◽

M. Karppinen ◽

H. Yamauchi

Keyword(s):

Hole Doping

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Electron-Phonon Interaction in the High- Cuprates in the Framework of the Van Hove Scenario

Advances in Condensed Matter Physics ◽

10.1155/2010/472636 ◽

2010 ◽

Vol 2010 ◽

pp. 1-9 ◽

Cited By ~ 12

Author(s):

Jacqueline Bouvier ◽

Julien Bok

Keyword(s):

Theoretical Models ◽

Copper Oxides ◽

Hole Doping ◽

Superconducting Gap ◽

Phonon Interaction ◽

Electronic Density ◽

Electron Phonon Interaction ◽

Marginal Fermi Liquid ◽

Jahn Teller ◽

Jahn Teller Effect

Electron-lattice interaction was the original idea of Müller and Berdnorz who chose copper oxides, because of the strong Jahn-Teller effect of the Cu ion leading to the formation of bipolarons. Later several experimental features led to theoretical models based on strong electronic correlations. The high- superconductors cuprates are quasi-bidimensional (2D) and thus lead to the existence of Van Hove singularities (VHs) in the band structure, that is, a peak in the electronic density of states. The presence of VHs near the Fermi-level in the cuprates is now well established. In this context we show that many physical properties of these materials can be explained using electron-phonon interaction, in particular the high critical temperature , the anomalous isotope effect, the superconducting gap and its anisotropy, and the marginal Fermi-liquid properties. These compounds present a topological transition for a critical hole doping hole per plane.

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