The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
A. S. Alexandrov - One of the best experts on this subject based on the ideXlab platform.
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Diamagnetism of real space pairs above tc in hole doped cuprates
Journal of Physics: Condensed Matter, 2010Co-Authors: A. S. AlexandrovAbstract:The nonlinear normal state Diamagnetism reported by Li et al (2010 Phys. Rev. B 81 054510) is shown to be incompatible with a claimed Cooper pairing and vortex liquid above the resistive critical temperature. However, it is perfectly compatible with the normal state Landau Diamagnetism of real-space composed bosons, which provides a description of the nonlinear magnetization curves of the less anisotropic cuprates La–Sr–Cu–O (LSCO) and Y–Ba–Cu–O (YBCO) as well as for strongly anisotropic bismuth-based cuprates over the whole range of available magnetic fields.
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Diamagnetism of real-space pairs above Tc in hole doped cuprates
Journal of physics. Condensed matter : an Institute of Physics journal, 2010Co-Authors: A. S. AlexandrovAbstract:The nonlinear normal state Diamagnetism reported by Lu Li et al. [Phys. Rev. B 81, 054510 (2010)] is shown to be incompatible with an acclaimed Cooper pairing and vortex liquid above the resistive critical temperature. Instead it is perfectly compatible with the normal state Landau Diamagnetism of real-space composed bosons, which describes the nonlinear magnetization curves in less anisotropic cuprates La-Sr-Cu-O (LSCO) and Y-Ba-Cu-O (YBCO) as well as in strongly anisotropic bismuth-based cuprates in the whole range of available magnetic fields.
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Normal-state Diamagnetism of charged bosons in cuprate superconductors.
Physical review letters, 2006Co-Authors: A. S. AlexandrovAbstract:Normal-state orbital Diamagnetism of charged bosons quantitatively accounts for recent high-resolution magnetometery results near and above the resistive critical temperature T(c) of superconducting cuprates. The parameter-free descriptions of normal-state Diamagnetism, T(c), upper critical fields, and specific heat anomalies support the 3D Bose-Einstein condensation of preformed real-space pairs with a zero off-diagonal order parameter above T(c) at variance with phase fluctuation scenarios of cuprates.
Qiang Gu - One of the best experts on this subject based on the ideXlab platform.
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Diamagnetism versus paramagnetism in charged spin 1 bose gases
Journal of Physics: Condensed Matter, 2011Co-Authors: Xiaoling Jian, Qiang GuAbstract:It has been suggested that either the Diamagnetism or paramagnetism of Bose gases, due to the charge or spin degrees of freedom respectively, appears solely to be extraordinarily strong. We investigate the magnetic properties of charged spin-1 Bose gases in an external magnetic field, focusing on the competition between the Diamagnetism and paramagnetism, using the Lande-factor g of particles to evaluate the strength of the paramagnetic effect. We propose that a gas with exhibits Diamagnetism at all temperatures, while a gas with g > 1/2 always exhibits paramagnetism. Moreover, a gas with the Lande-factor in between shows a shift from paramagnetism to Diamagnetism as the temperature decreases. The paramagnetic and diamagnetic contributions to the total magnetization density are also calculated in order to demonstrate some details of the competition.
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Diamagnetism versus paramagnetism in charged spin-1 Bose gases.
Journal of Physics: Condensed Matter, 2010Co-Authors: Xiaoling Jian, Qiang GuAbstract:It has been suggested that either the Diamagnetism or paramagnetism of Bose gases, due to the charge or spin degrees of freedom respectively, appears solely to be extraordinarily strong. We investigate the magnetic properties of charged spin-1 Bose gases in an external magnetic field, focusing on the competition between the Diamagnetism and paramagnetism, using the Lande-factor g of particles to evaluate the strength of the paramagnetic effect. We propose that a gas with g 1/2 always exhibits paramagnetism. Moreover, a gas with the Lande-factor in between shows a shift from paramagnetism to Diamagnetism as the temperature decreases. The paramagnetic and diamagnetic contributions to the total magnetization density are also calculated in order to demonstrate some details of the competition.
Debnarayan Jana - One of the best experts on this subject based on the ideXlab platform.
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Universal Diamagnetism:. Exact Results and Applications
International Journal of Modern Physics B, 2001Co-Authors: Debnarayan JanaAbstract:Diamagnetism is a universal pheneomenon of spinless boson system at any finite temperature regardless of their interactions. We present here the exact, non-perturbative results of universal Diamagnetism of charged scalar fields at any finite temperature. As an application, we study the effect of anisotropy of two coherence lengths on diamagnetic susceptibility of Cooper pairs in an arbitrary d-dimensions above the transition temperature.
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CHARGED SCALAR FIELDS IN AN EXTERNAL MAGNETIC FIELD : RENORMALISATION AND UNIVERSAL Diamagnetism
Nuclear Physics B, 1996Co-Authors: Debnarayan JanaAbstract:The physical and mathematical mechanism behind Diamagnetism of N (finite) spinless bosons (relativistic or non-relativistic) is well known. The mathematical signature of this Diamagnetism follows from Kato's inequality while its physical way of understanding goes back to Van Leeuwen. One can guess that it might be true in the field theoretic case also. While the work on systems with a finite number of degrees of freedom suggests that the same result is true in a field theory, it does not by any means prove it. In the field theoretic context one has to develop a suitable regularisation scheme to renormalise the free energy. We show that charged scalar fields in (2+1) and (3+1) dimensions are always diamagnetic, even in the presence of interactions and at finite temperatures. This generalises earlier work on the Diamagnetism of charged spinless bosons to the case of infinite degrees of freedom. We also discuss possible applications of the theory.
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Universal Diamagnetism of Charged Scalar Fields
arXiv: Condensed Matter, 1995Co-Authors: Debnarayan JanaAbstract:We show that charged scalar fields are always diamagnetic, even in the presence of interactions and at finite temperatures. This generalises earlier work on the Diamagnetism of charged spinless bosons to the case of infinite degrees of freedom.
Cheol Eui Lee - One of the best experts on this subject based on the ideXlab platform.
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field induced transition from room temperature ferromagnetism to Diamagnetism in proton irradiated fullerene
Advanced Materials, 2013Co-Authors: Kyu Won Lee, Hyocheon Kweon, Cheol Eui LeeAbstract:Room-temperature ferromagnetism in proton-irradiated C60 fullerene is demonstrated. The ferromagnetism turns into Diamagnetism intrinsic to the fullerene as the magnetic field increases above a critical field.
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Apparent Diamagnetism in quasi-two-dimensional Heisenberg antiferromagnets
Current Applied Physics, 2009Co-Authors: Kyu Won Lee, Cheol Eui LeeAbstract:Abstract We observed an apparent Diamagnetism in representative quasi-two-dimensional Heisenberg canted antiferromagnets, (C n H 2 n +1 NH 3 ) 2 MnCl 4 , indicating that the quasi-one-dimensionality is not essential for the apparent Diamagnetism. The apparent diamagnetic response seems to be promoted by a thermal quenching and is characterized by a linear response to the applied magnetic field with a constant internal field.
Xiaoling Jian - One of the best experts on this subject based on the ideXlab platform.
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Diamagnetism versus paramagnetism in charged spin 1 bose gases
Journal of Physics: Condensed Matter, 2011Co-Authors: Xiaoling Jian, Qiang GuAbstract:It has been suggested that either the Diamagnetism or paramagnetism of Bose gases, due to the charge or spin degrees of freedom respectively, appears solely to be extraordinarily strong. We investigate the magnetic properties of charged spin-1 Bose gases in an external magnetic field, focusing on the competition between the Diamagnetism and paramagnetism, using the Lande-factor g of particles to evaluate the strength of the paramagnetic effect. We propose that a gas with exhibits Diamagnetism at all temperatures, while a gas with g > 1/2 always exhibits paramagnetism. Moreover, a gas with the Lande-factor in between shows a shift from paramagnetism to Diamagnetism as the temperature decreases. The paramagnetic and diamagnetic contributions to the total magnetization density are also calculated in order to demonstrate some details of the competition.
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Diamagnetism versus paramagnetism in charged spin-1 Bose gases.
Journal of Physics: Condensed Matter, 2010Co-Authors: Xiaoling Jian, Qiang GuAbstract:It has been suggested that either the Diamagnetism or paramagnetism of Bose gases, due to the charge or spin degrees of freedom respectively, appears solely to be extraordinarily strong. We investigate the magnetic properties of charged spin-1 Bose gases in an external magnetic field, focusing on the competition between the Diamagnetism and paramagnetism, using the Lande-factor g of particles to evaluate the strength of the paramagnetic effect. We propose that a gas with g 1/2 always exhibits paramagnetism. Moreover, a gas with the Lande-factor in between shows a shift from paramagnetism to Diamagnetism as the temperature decreases. The paramagnetic and diamagnetic contributions to the total magnetization density are also calculated in order to demonstrate some details of the competition.