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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 paper, the x-ray diffractogram has been indexed with a basis vector set that is closely related to the icosahedral set, and the Mossbauer effect has been shown to be present in decagonal phase alloys.
Abstract: Ribbons of pure decagonal ${\mathrm{Al}}_{7}$(${\mathrm{Mn}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{Fe}}_{\mathrm{x}}$${)}_{2}$ x=0 and 0.3, have been prepared. The x-ray diffractogram has been indexed with a basis vector set that is closely related to the icosahedral set. A M\"ossbauer-effect study shows that the local iron environment in decagonal phase alloys is similar but less asymmetric than that in icosahedral alloys.

48 citations

Journal ArticleDOI
TL;DR: Gas sensing studies showed that the sensor prepared using 1% Cu doped SnO2 nanostructures exhibits highly enhanced CO gas sensing properties as compared to pure SnO1 nanostructure and shows excellent selectivity for CO with negligible interference from CH4, CO2 and NO2.
Abstract: We report the synthesis of Cu doped SnO2 nanostructures with enhanced CO gas sensing properties by a facile wet chemical method. The effects of Cu doping on the structural and optical properties of SnO2 nanostructures were investigated using X-ray diffraction, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and high resolution TEM (HRTEM) with energy dispersive X-ray spectroscopy, Raman spectroscopy and photoluminescence spectroscopy. FESEM studies revealed the presence of nanosheets and nanodisc-like structures in Cu doped SnO2 samples. Gas sensing studies showed that the sensor prepared using 1% Cu doped SnO2 nanostructures exhibits highly enhanced CO gas sensing properties as compared to pure SnO2 nanostructures and shows excellent selectivity for CO with negligible interference from CH4, CO2 and NO2. The possible mechanism for the enhanced CO gas sensing properties of Cu doped SnO2 nanostructures is proposed.

48 citations

Journal ArticleDOI
TL;DR: In this paper, a measurement method using an LC-circuit provides high sensitivity to small capacitance changes and hence allows the observation of the quantum part of the capacitance in top-gated graphene sheets.
Abstract: We report capacitance measurements in top-gated graphene sheets as a function of charge carrier density. A measurement method using an LC-circuit provides high sensitivity to small capacitance changes and hence allows the observation of the quantum part of the capacitance. The extracted density of states has a finite value of 1◊10 17 m 2 eV 1 in the vicinity of the Dirac point, which is in contrast to the theoretical prediction for ideal graphene. We attribute this discrepancy to fluctuations of the electrostatic potential with a typical amplitude of 100meV in our device.

47 citations

Journal ArticleDOI
TL;DR: It is reported that microwaves can also excite tunnelling transitions between states with different spin, and it is shown that the dominant mechanism responsible for violation of spin conservation is the spin–orbit interaction.
Abstract: Tunnelling transitions triggered by microwave irradiation between coupled quantum dots have generally been assumed to be spin-conserving This study shows that this condition is violated in the presence of spin–orbit coupling, thus opening new possibilities for manipulating a two–spin qubit system by microwave irradiation

47 citations

Journal ArticleDOI
TL;DR: Two quantum dots with tunable mutual tunnel coupling have been embedded in a two-terminal Aharonov-Bohm geometry that demonstrates coherent tunneling through nonresonant states in the cotunneling regime.
Abstract: Two quantum dots with tunable mutual tunnel coupling have been embedded in a two-terminal Aharonov-Bohm geometry. Aharonov-Bohm oscillations investigated in the cotunneling regime demonstrate coherent tunneling through nonresonant states. Visibilities of more than 0.8 are measured indicating that phase-coherent processes are involved in the elastic and inelastic cotunneling. An oscillation-phase change of pi is detected as a function of bias voltage at the inelastic cotunneling onset.

47 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