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Institution

Solid State Physics Laboratory

FacilityDelhi, India
About: Solid State Physics Laboratory is a facility organization based out in Delhi, India. It is known for research contribution in the topics: Quantum dot & Dielectric. The organization has 1754 authors who have published 2597 publications receiving 50601 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, a model of the smectic C phase is proposed in which the tilt is thought to originate from the forces between dipoles and induced dipoles, where the rotation about the long axis is assumed to be free.
Abstract: A model of the smectic C phase is proposed in which the tilt is thought to originate from the forces between dipoles and induced dipoles. The rotation about the long axis is assumed to be free. Three ordered phases are found corresponding with the smectic C phase, the smectic A phase and the nematic phase. The entropy of packing plays an important role in the mechanism of the smectic C-smectic A phase transition. This transition is not of the usual order-disorder type.

35 citations

Journal ArticleDOI
TL;DR: In this paper, a functional 1D photonic crystal system built from a mesoporous mixed oxide multilayer is proposed that is able to switch from transparent to Bragg reflector states by means of adsorption/desorption of liquid in/from the system.
Abstract: A functional 1D photonic crystal system built from a mesoporous mixed oxide multilayer is proposed that is able to switch from transparent to Bragg reflector states (characterized by a photonic stop band in the visible range) and vice versa by means of adsorption/desorption of liquid in/from the system. One-pot co-condensation of two different precursors enables tailoring of the optical refractive index of inorganic layers by a strict control of pore fraction and the ratio of mixed oxides. Using various templates, 1-hexadecyl trimethylammonium bromide for the low-refractive-index layers and Pluronic P123 for the high-refractive-index layers, an adequate distribution of the pore fraction was obtained. Mixing two oxides with high and low bulk refractive indexes enables tuning of the refractive index contrast between the adjacent layers. When the pores of the system are empty, the light passes through the medium with no reflection thanks to index matching between the layers, which confers to the mesoporous Bragg stack the ability to appear as an effective homogenous medium. The mesoporous Bragg stack has the ability to switch to colored when the pores are filled with water as a result of increasing the refractive index contrast between the layers. This functional multilayer system opens a new range of promising applications of inorganic mesoporous 1D photonic crystals, e.g. as smart coatings for privacy glass windows.

35 citations

Journal ArticleDOI
TL;DR: In the authors' bilayer graphene quantum dots, it is demonstrated that the valley g-factor gv, defined analogously to the spin g-Factor gs for valley splitting in a perpendicular magnetic field, is tunable by over a factor of 4 from 20 to 90, by gate voltage adjustments only.
Abstract: Quantum states in graphene are 2-fold degenerate in spins, and 2-fold in valleys. Both degrees of freedom can be utilized for qubit preparations. In our bilayer graphene quantum dots, we demonstrate that the valley g-factor gv, defined analogously to the spin g-factor gs for valley splitting in a perpendicular magnetic field, is tunable by over a factor of 4 from 20 to 90, by gate voltage adjustments only. Larger gv results from larger electronic dot sizes, determined from the charging energy. On our versatile device, bipolar operation, charging our quantum dot with charge carriers of the same or the opposite polarity as the leads, can be performed. Dots of both polarities are tunable to the first charge carrier, such that the transition from an electron to a hole dot by the action of the plunger gate can be observed. Addition of gates easily extends the system to host tunable double dots.

35 citations

Journal ArticleDOI
TL;DR: In this paper, the authors explored spin, charge, and orbitally ordered states in lattice models and showed that a ferromagnetic state with a charge modulation along the c axis might be responsible for the anomalous behavior around $x = 1/8.
Abstract: We have explored spin, charge, and orbitally ordered states in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ $(0lxl1/2)$ using model Hartree-Fock calculations on $d\ensuremath{-}p$-type lattice models. At $x=1/8,$ several charge and orbitally modulated states are found to be stable and almost degenerate in energy with a homogeneous ferromagnetic state. The present calculation indicates that a ferromagnetic state with a charge modulation along the c axis which is consistent with the experiment by Yamada et al. might be responsible for the anomalous behavior around $x=1/8.$

35 citations

Journal ArticleDOI
01 Apr 1987-Burns
TL;DR: It is concluded that 'fractal burns' are caused by surface discharges of a positive polarity and the recognition of such burns can help to elucidate the type and mechanism of the lightning strike.

35 citations


Authors

Showing all 1757 results

NameH-indexPapersCitations
Alain Dufresne11135845904
Yang Ren7988026341
Klaus Ensslin7063821385
Werner Wegscheider6993321984
Takashi Takahashi6542414234
Liu Hao Tjeng6432213752
Nicholas E. Geacintov6345315636
Manfred Sigrist6146818362
Thomas Ihn6147514159
Takafumi Sato5926311032
Christoph Stampfer5931514422
Christian Colliex5828914618
Takashi Mizokawa5740011697
Eberhard Bodenschatz5737413208
Bertram Batlogg551909459
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
202210
202174
202087
201992
201878