Zobrazeno 1 - 10
of 742
pro vyhledávání: '"PANDEY, K. P."'
Autor:
Modak, M., Kaiwart, Rahul, Gupta, Santosh K., Dwivedi, A., Pandey, K. K., Poswal, A. K., Poswal, H. K.
In this article we report the structural stability of Er$_2$Ti$_2$O$_7$ cubic pyrochlore with pressure using x-ray diffraction, Raman spectroscopy, photoluminescence, x-ray absorption and ab-initio calculations. Our studies establish a phase transfor
Externí odkaz:
http://arxiv.org/abs/2406.04128
Autor:
Dhar, Achyut, Levitas, Valery I., Pandey, K. K., Park, Changyong, Somayazulu, Maddury, Velisavljevic, Nenad
Plastic strain-induced phase transformations (PTs) and chemical reactions under high pressure are broadly spread in modern technologies, friction and wear, geophysics, and astrogeology. However, because of very heterogeneous fields of plastic strain
Externí odkaz:
http://arxiv.org/abs/2405.14807
High-pressure synchrotron X-ray diffraction (XRD) studies have been conducted on three types of Si particles (micron, 100 nm, and 30 nm). The pressure for initiation of Si-I->Si-II phase transformation (PT) essentially increases with a reduction in p
Externí odkaz:
http://arxiv.org/abs/2402.15092
Autor:
Pandey, K. K., Poswal, H. K.
In situ studies under severe plastic deformation at high pressures, employing rotational/shear diamond anvil cells (RDAC), have recently gained much interest in the high-pressure community owing to their potential applications in material processing
Externí odkaz:
http://arxiv.org/abs/2312.13639
Pressure-induced phase transformations (PTs) between numerous phases of Si, the most important electronic material, have been studied for decades. This is not the case for plastic strain-induced PTs. Here, we revealed in-situ various unexpected plast
Externí odkaz:
http://arxiv.org/abs/2303.04407
The first study of the effect of the initial microstructure on its evolution under hydrostatic compression before, during, and after the irreversible $\alpha\rightarrow\omega$ phase transformation and during pressure release in Zr using in situ x-ray
Externí odkaz:
http://arxiv.org/abs/2301.10475
Various phenomena (phase transformations, chemical reactions, and friction) under high pressures in diamond anvil cell are strongly affected by fields of all components of stress and plastic strain tensors. However, they could not be measured. Even m
Externí odkaz:
http://arxiv.org/abs/2212.13000
Autor:
Pandey, K. K., Viswanathan, P.
The natural kinship between classical theories of interpolation and approximation is well explored. In contrast to this, the interrelation between interpolation and approximation is subtle and this duality is relatively obscure in the context of frac
Externí odkaz:
http://arxiv.org/abs/2104.02950
Autor:
Pandey, K. K., Viswanathan, P.
We provide a general framework to construct fractal interpolation surfaces (FISs) for a prescribed countably infinite data set on a rectangular grid. Using this as a crucial tool, we obtain a parameterized family of bivariate fractal functions simult
Externí odkaz:
http://arxiv.org/abs/2010.05467
Publikováno v:
Phys. Rev. A 102, 063722 (2020)
We measure the resonant forward scattering of light by a highly saturated atomic medium through the flashes emitted immediately after an abrupt extinction of the probe beam. The experiment is done in a dilute regime where the phenomena are well captu
Externí odkaz:
http://arxiv.org/abs/2006.15540