Conduction in granular metals-variable-range hopping in a Coulomb gap?

Adkins, C. J.

doi:10.1088/0953-8984/1/7/009

Cited by 125 publications

(114 citation statements)

References 16 publications

Supporting

Mentioning

107

Contrasting

Order By: Relevance

“…Whereas, the value n=2 means that the DOS varies in the vicinity of the Fermi level and p=0.5, corresponding to ES VRH with creation of CG (Equation (2)). Both VRH regimes have been widely shown in several materials [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 86%

See 1 more Smart Citation

Hopping conduction in amorphous silicon-chromium films at very low temperature

Errai¹,

kaaouachi²,

Idrissi³

et al. 2014

AIP Conference Proceedings

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 86%

“…It has been invoked to explain the conduction in several compounds, such as, semiconductors [5][6][7][8], semiconductormetal alloys [9] and granular films [10,11].…”

Section: Introductionmentioning

confidence: 99%

Hopping conduction in amorphous silicon-chromium films at very low temperature

Errai¹,

kaaouachi²,

Idrissi³

et al. 2014

AIP Conference Proceedings

View full text Add to dashboard Cite

“…Such materials have been studied for quite a long time (e.g. [1][2][3][4][5][6]). Granular materials in which metallic grains transit into the superconducting state may have even more interesting properties since not only a single electron hopping but also the Cooper pair hopping is possible below critical temperature.…”

Section: Introductionmentioning

confidence: 99%

Conductivity and Superconductivity in Granular Materials

et al. 2008

View full text Add to dashboard Cite

Granular metals and superconductors are very interesting materials thanks to their untypical electrical properties caused by the presence of the Coulomb effects, electron and Cooper pair tunnelling and various aspects of disorder. Most typical and widely studied representatives of this group consist of low T c superconductor granules distributed in insulating matrix (e.g. lead in germanium matrix). In comparison with them a system of granules of high-T c superconductors embedded in an insulating matrix is more difficult to be experimentally realised. (Bi,Pb)-Sr-Ca-Cu-O materials obtained with solid state crystallisation method may be considered as an example of granular and disordered metals and superconductors. Solid state crystallisation of initially amorphous material leads to formation of 2201 and 2212 granules embedded in the insulating or semiconducting matrix. Further annealing causes increase in size and/or the number of conducting grains and decrease in the width of the insulating barriers between them. In both cases of low-and high-T c granular materials the main parameters, which determine their properties, are the amount of metallic phases and the tunnelling conductivity between the neighbouring grains. In this work some properties of low-and high-T c granular materials are discussed and compared.

show abstract

“…The main problem arising with this is the neglection of many-body effects. Several experimental [5][6][7] and numerical [8] results give evidences that electronic correlations are very important in these systems and they must be taken into account. More recently, methods were developed to obtain an almost complete set of low-lying states of the Coulomb glass [9,10].…”

Section: Introductionmentioning

confidence: 99%

Configuration space in electron glasses

Pérez‐Garrido

Ortuño

Somoza

et al. 2001

Philosophical Magazine B

View full text Add to dashboard Cite

We study numerically the configuration space at low energy of electron glasses. We consider systems with Coulomb interactions, short-range interactions and no interactions. First, we calculate the integrated density of configurations as a function of energy. At a given energy, this density is smaller for Coulomb glasses than for short-range systems, which in turn is smaller than for noninteracting systems. We analyze how the site occupancy varies with the number of configurations. Through this study we estimate the number of particles involved in a typical low-energy transition between configurations. This number increases with system size for long range interactions, while it is basically constant for a short-range interaction. Finally we calculate the density of metastable configurations, i.e. valleys, classified according to their degree of stability.

show abstract

Conduction in granular metals-variable-range hopping in a Coulomb gap?

Cited by 125 publications

References 16 publications

Hopping conduction in amorphous silicon-chromium films at very low temperature

Hopping conduction in amorphous silicon-chromium films at very low temperature

Conductivity and Superconductivity in Granular Materials

Configuration space in electron glasses

Contact Info

Product

Resources

About