Investigation of SiN<i>X</i>:H/Si interface by capacitance method

Maeda, Keiji; Umezu, Ikurou; Kawaguchi, Akio

doi:10.1063/1.106035

Cited by 6 publications

(6 citation statements)

References 1 publication

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“…The second and third equation in (24) can be combined to find the following solution for the breathing mode…”

Section: Compactification Of 11-dimensional Supergravitymentioning

confidence: 99%

“…This manifold can, for example, be a torus T 7 or a product of a Calabi-Yau 3-fold and S 1 . The general equations of motion (24), (25), adapted to the situation of two cosets (with δ = 7 inserted), now read…”

Section: The Example D =mentioning

confidence: 99%

“…The most interesting part of duality transformations in cosmology is the one which acts non-trivially on the space-time metric and it is this part on which we will concentrate. Therefore, we are going to reduce 11-dimensional supergravity on a Ricci-flat manifold to D dimensions, thereby keeping the breathing mode of the internal space as the only modulus [24] and focusing on the D-dimensional "external" part of U-duality. As a general rule, this part of the U-duality group acting on cosmological solutions in D space-time dimensions is the same as the U-duality group of 12 − D-dimensional maximal supergravity.…”

mentioning

confidence: 99%

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U-duality covariant M-theory cosmology.

Lukas

Ovrut

1998

Physics Letters B

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A manifestly U-duality covariant approach to M-theory cosmology is developed and applied to cosmologies in dimensions D = 4, 5. Cosmological properties such as expansion powers and Hubble parameters turn out to be U-duality invariant in certain asymptotic regions. U-duality transformations acting on cosmological solutions, on the other hand, shift the transition time between two asymptotic regions and determine the details of the transition. Moreover, in D = 5, we show that U-duality can map expanding negative and positive branch solutions into each other.

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“…The second and third equation in (24) can be combined to find the following solution for the breathing mode…”

Section: Compactification Of 11-dimensional Supergravitymentioning

confidence: 99%

Section: The Example D =mentioning

confidence: 99%

mentioning

confidence: 99%

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U-duality covariant M-theory cosmology.

Lukas

Ovrut

1998

Physics Letters B

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“…A part of this method has been reported [8]. Here, outlines of the method and the results are presented.…”

Section: Interface State Density At A-sinx:h/c-simentioning

confidence: 96%

Subthreshold Characteristics and Interface State Density of a-Si:H TFT

1993

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Inverted-staggered a-Si:H TUT was prepared by successive PECVD of a-SiN 1 . 7 :H and aSi:H layers. Drain current ID vs gate voltage VG 1 characteristics of the TFT were investigated. The gatc-voltage swing defined by S=dVG/d(log ID) in the subthreshold region was 1.4 V at room temperature. If the observed S value is attributed to the bulk gap state density, the space-charge layer width is estimated to be about 450 A. This value is too small compared with the a-Si:H layer width of about 3000 A in the TFT, which exhibits good performance. On the other hand, if the S value is attributed to the interface states, a state density of 1.5x10 12 (cm 2 eV)-1 is necessary.Nearly the same density, (1-2)xlO 12 (cm 2 eV)-1, nearly independent of the energy level, was obtained in our a-SiNt. 7 :H/c-Si interface by capacitance measurements. Therefore, it is concluded that the interface states are the main origin of the subthreshold characteristics in our a-Si:H TFT.

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“…Among all curvature squared generalizations of Einstein's theory, Lovelock theories therefore have a special status in that they preserve the number of degrees of freedom: a generic curvature squared action yields field equations that are fourth order in the metric, containing thus more degrees of freedom than Einstein's theory. This has generated wide interest in Lovelock theories, especially in the contexts of cosmology and black hole physics [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Hamiltonian thermodynamics of a Lovelock black hole

Louko¹,

Simon²,

Winters‐Hilt³

1997

Phys. Rev. D

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We consider the Hamiltonian dynamics and thermodynamics of spherically symmetric spacetimes within a one-parameter family of five-dimensional Lovelock theories. We adopt boundary conditions that make every classical solution part of a black hole exterior, with the spacelike hypersurfaces extending from the horizon bifurcation three-sphere to a timelike boundary with fixed intrinsic metric. The constraints are simplified by a Kucha\v{r}-type canonical transformation, and the theory is reduced to its true dynamical degrees of freedom. After quantization, the trace of the analytically continued Lorentzian time evolution operator is interpreted as the partition function of a thermodynamical canonical ensemble. Whenever the partition function is dominated by a Euclidean black hole solution, the entropy is given by the Lovelock analogue of the Bekenstein-Hawking entropy; in particular, in the low temperature limit the system exhibits a dominant classical solution that has no counterpart in Einstein's theory. The asymptotically flat space limit of the partition function does not exist. The results indicate qualitative robustness of the thermodynamics of five-dimensional Einstein theory upon the addition of a nontrivial Lovelock term.Comment: 22 pages, REVTeX v3.

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Investigation of SiNX:H/Si interface by capacitance method

Cited by 6 publications

References 1 publication

U-duality covariant M-theory cosmology.

U-duality covariant M-theory cosmology.

Subthreshold Characteristics and Interface State Density of a-Si:H TFT

Hamiltonian thermodynamics of a Lovelock black hole

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