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We have studied the spin polarized hot neutron matter in the presence of strong magnetic field. In this work, using the lowest order constrained variational method at finite temperature and employing $AV_{18}$ nuclear potential, some…

Nuclear Theory · Physics 2012-12-11 G. H. Bordbar , Z. Rezaei

There are currently two open questions in white dwarf physics: why are massive dwarfs observed less often in astronomical surveys, and why have not any super-Chandrasekhar white dwarfs been found despite the discovery of more than a dozen…

Solar and Stellar Astrophysics · Physics 2024-02-13 Aneta Wojnar , Surajit Kalita , Lupamudra Sarmah

We summarize recent improvements in model atmosphere and internal structure of faint white dwarfs. We derive an analytical cooling theory which illustrates the effects of various physical processes on the energy budget and the cooling…

Astrophysics · Physics 2007-05-23 Gilles Chabrier

We investigate the luminosity suppression and its effect on the mass-radius relation as well as cooling evolution of highly magnetised white dwarfs. Based on the effect of magnetic field relative to gravitational energy, we suitably modify…

Solar and Stellar Astrophysics · Physics 2022-04-06 Mukul Bhattacharya , Alexander J. Hackett , Abhay Gupta , Christopher A. Tout , Banibrata Mukhopadhyay

We study low temperature properties in the metallic magnets, considering the itinerant electron mediated ferromagnetism. Applying the Monte Carlo simulations to the extended double exchange model, we discuss reorientation phase transition…

Strongly Correlated Electrons · Physics 2019-06-06 Y. Taguchi , J. Nasu , A. Koga , T. Yoshioka , H. Tsuchiura

If, during the preparation, an external magnetic field is applied upon cooling we say it has been field cooled. A novel mechanism for insulator-metal transition and superconductivity in field-cooled spin-$1/2$ antiferromagnets on bcc…

Superconductivity · Physics 2018-01-17 Naoum Karchev

We explore the impact of an external magnetic field on hadron yields and fluctuations in a thermalized system within the hadron resonance gas (HRG) model using an expanded Thermal-FIST package. The magnetic field sizably enhances the final…

Nuclear Theory · Physics 2024-10-02 Volodymyr Vovchenko

Antiferromagnetic spintronics is an emerging field; antiferromagnets can improve the functionalities of ferromagnets with higher response times, and having the information shielded against external magnetic field. Moreover, a large list of…

We present an improved treatment for the scattering of heavy dark matter from the ion constituents of a white dwarf. In the heavy dark matter regime, multiple collisions are required for the dark matter to become gravitationally captured.…

High Energy Physics - Phenomenology · Physics 2024-07-22 Nicole F. Bell , Giorgio Busoni , Sandra Robles , Michael Virgato

The muon-to-electron conversion in nuclei like aluminum, titanium and gold is studied in the context of a class of mirror fermion model with non-sterile right-handed neutrinos having mass at the electroweak scale. At the limit of zero…

High Energy Physics - Phenomenology · Physics 2018-08-01 P. Q. Hung , Trinh Le , Van Que Tran , Tzu-Chiang Yuan

We present an analysis of all single white dwarf stars known to exhibit spectroscopic signatures of neutral helium line splitting due to the presence of a strong magnetic field. Using state-of-the-art models taking into account the effects…

Solar and Stellar Astrophysics · Physics 2023-02-01 François Hardy , Patrick Dufour , Stefan Jordan

In various "strange" metals, electrons undergo Planckian dissipation, a strong and anomalous scattering that grows linearly with temperature, in contrast to the quadratic temperature dependence expected from the standard theory of metals.…

An entirely new model for the structure as well as for the cooling mechanism of white dwarfs has been proposed. We have argued that the massive part of the constituents of white dwarfs- the positively charged ions are boson and under the…

Astrophysics · Physics 2007-05-23 Nandini Nag , Somenath Chakrabarty

Magnetization and magnetoresistance have been measured in insulating antiferromagnetic La_{2}Cu_{0.97}Li_{0.03}O_{4} over a wide range of temperatures, magnetic fields, and field orientations. The magnetoresistance step associated with a…

Strongly Correlated Electrons · Physics 2011-06-08 I. Raicevic , Dragana Popovic , C. Panagopoulos , L. Benfatto , M. B. Silva Neto , E. S. Choi , T. Sasagawa

At low temperature and for finite spin scattering in a weakly disordered metal, for a certain value, predicted from our theory, of the material-dependent paramagnon interaction, the total conductivity becomes highly sensitive to the orbital…

Disordered Systems and Neural Networks · Physics 2008-02-03 George Kastrinakis

The resistivities of the dilute, strongly-interacting 2D electron systems in the insulating phase of a silicon MOSFET are the same for unpolarized electrons in the absence of magnetic field and for electrons that are fully spin polarized by…

Strongly Correlated Electrons · Physics 2017-01-18 Shiqi Li , M. P. Sarachik

Weak neutral current interactions with charged leptons have offered unique opportunities to study novel aspects of hadronic structure and search for physics beyond the standard model. These studies in the medium energy community have been…

Nuclear Experiment · Physics 2018-06-13 S. Riordan

About 20% of the white dwarfs possess a magnetic field that may be detected by the splitting and/or polarization of their spectral lines. As they cool, the effective temperatures of the white dwarfs becomes so low that no spectral lines can…

Solar and Stellar Astrophysics · Physics 2024-08-08 A. Berdyugin , J. D. Landstreet , S. Bagnulo , V. Piirola , S. V. Berdyugina

Anisotropy effects can significantly control or modify the ground-state properties of magnetic systems. Yet the origin and the relative importance of the possible anisotropy terms is difficult to assess experimentally and often ambiguous.…

Strongly Correlated Electrons · Physics 2015-05-28 A. Furrer , F. Juranyi , K. W. Kraemer , M. Schneider , Th. Straessle

It is shown that a family of models associated with the kicked Harper model is relevant for cyclotron resonance experiments in an antidot array. For this purpose a simplified model for electronic motion in a related model system in presence…

Condensed Matter · Physics 2009-10-31 A. Iomin , S. Fishman
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