Thermoelectric Properties of Fe0.2Co3.8Sb12-xTex ... - Physics

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Violation of Chandrasekhar mass limit: Strongly magnetized white dwarfs as progenitors of super-Chandrasekhar type Ia supernovae Upasana Das, Banibrata Mukhopadhyay Department of Physics, Indian Institute of Science, Bangalore 560012, India upasana@physics.iisc.ernet.in, bm@physics.iisc.ernet.in November 15, 2012 Abstract Recent observations of peculiar Type Ia supernovae - SN 2006gz, SN 2007if, SN 2009dc, SN 2003fg - seem to suggest super-Chandrasekhar-mass white dwarfs with masses up to 2.4 - 2.8 solar mass, as their most likely progenitors. We show that strongly magnetized white dwarfs can violate the Chandrasekhar mass limit (which is 1.44 solar mass) significantly, owing to the Landau quantization of the relativistic electron degenerate gas. Interestingly, our results seem to lie within the above observational limits. We also establish that accretion on to commonly observed magnetized white dwarfs, coupled with the phenomenon of flux freezing, leads to the generation of very strong magnetic fields in the interiors of these white dwarfs. This would in turn explain the super-Chandrasekhar masses according to our proposed theory. 1
Superfluidity in Bricks! Arijit Haldar and Vijay B. Shenoy Centre for Condensed Matter Theory Indian Institute of Science, Bangalore 560 012 An optical brick lattice has recently be realized by the ETH group. We show that this systems offers the possibility of realizing a superfluid state of fermions with a high transition temperature. The brick lattice defined by three hopping parameters, in a regime, has a band gap. Exploiting this, we propose to the band insulator obtained in this regime to beat the entropy problem, to obtain an optical lattice superfluid by tuning an attractive interaction between the fermions. By studying the quantum field theory of the system including Gaussian fluctuations, we estimate the Kosterlitz- Thouless transition temperature of the system. We find that in a regime of parameters the transition temperature is “ high” , i.e., of the order of the hopping scale. See also: Related poster by Yogeshwar Prasad et al.
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FOREWORD As a periodic review of it
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Session II 11:00-1:00 T07 11:00-11:
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List of Posters No. Presenter Title
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TALK ABSTRACTS
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Possible nature of internal disorde
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A new model of flow induced voltage
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Landau Level Spectroscopy of Broken
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Evidence of gradient in dynamics of
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A reversible shear-induced crystall
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Confinement of Spin Waves in Grids
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Page 30 and 31: Probing superconductivity in the 2D
Page 32 and 33: Freezing of the octahedral tilt nea
Page 35: POSTER ABSTRACTS
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Thermoelectric Properties of Fe0.2Co3.8Sb12-xTex ... - Physics

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