Insulator/metal phase transition and colossal magnetoresistance in holographic model

Cai, Rong-Gen; Yang, Run-Qiu

doi:10.1103/physrevd.92.106002

Cited by 19 publications

(13 citation statements)

References 58 publications

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“…Next, we consider the case in which the momentum dissipation ∼ k is dominant compared to the other scales in the system. Working to leading order in the strong momentum dissipation limit, we obtain the conductivities 27) and the corresponding resistivities…”

Section: Strong Momentum Dissipation Limitmentioning

confidence: 99%

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Backreacted DBI magnetotransport with momentum dissipation

Cremonini

Hoover

2017

J. High Energ. Phys.

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We examine magnetotransport in a holographic Dirac-Born-Infeld model, taking into account the effects of backreaction on the geometry. The theory we consider includes axionic scalars, introduced to break translational symmetry and generate momentum dissipation. The generic structure of the DC conductivity matrix for these theories is extremely rich, and is significantly more complex than that obtained in the probe approximation. We find new classes of black brane solutions, including geometries that exhibit Lifshitz scaling and hyperscaling violation, and examine their implications on the transport properties of the system. Depending on the choice of theory parameters, these backgrounds can lead to metallic or insulating behavior. Negative magnetoresistance is observed in a family of dynoic solutions. Some of the new backreacted geometries also support magneticfield-induced metal-insulator transitions.

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Section: Strong Momentum Dissipation Limitmentioning

confidence: 99%

“…Metal-insulator transitions or crossovers have been studied using other gravity setups, see, e.g. [25,26,27,28,29,30].…”

Section: Magnetotransport At Finite Magnetic Field and Charge Densitymentioning

confidence: 99%

Backreacted DBI magnetotransport with momentum dissipation

Cremonini

Hoover

2017

J. High Energ. Phys.

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“…Therefore, from this aspect the graviton mass plays the role of inhomogeneity in the boundary field theory, i.e., greater graviton mass is dual to greater inhomogeneity in the boundary. 1 There have been a number of papers investigating the inhomogeneous effects caused by massive gravity so far, see for example [35][36][37][38][39][40][41][42][43].…”

Section: Jhep07(2017)082mentioning

confidence: 99%

Influence of inhomogeneities on holographic mutual information and butterfly effect

Cai

Zeng

Zhang

2017

J. High Energ. Phys.

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Abstract:We study the effect of inhomogeneity, which is induced by the graviton mass in massive gravity, on the mutual information and the chaotic behavior of a 2+1-dimensional field theory from the gauge/gravity duality. When the system is near-homogeneous, the mutual information increases as the graviton mass grows. However, when the system is far from homogeneity, the mutual information decreases as the graviton mass increases. By adding the perturbations of energy into the system, we investigate the dynamical mutual information in the shock wave geometry. We find that the greater perturbations disrupt the mutual information more rapidly, which resembles the butterfly effect in chaos theory. Besides, the greater inhomogeneity reduces the dynamical mutual information more quickly just as in the static case.

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“…This model was extended by introducing two antisymmetric tensor fields which correspond with two magnetic sublattices in the materials [17]. In the framework of usual Maxwell electrodynamics, holographic paramagnetism-ferromagnetism phase transition have been investigated [17][18][19][20][21][22][23][24]. However, it is interesting to investigate the effects of nonlinear electrodynamics on the properties of the holographic paramagnetic-ferromagnetic phase transition.…”

Section: Introductionmentioning

confidence: 99%

Holographic paramagnetic-ferromagnetic phase transition with Power-Maxwell electrodynamics

2019

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We explore the effects of Power-Maxwell nonlinear electrodynamics on the properties of holographic paramagnetic-ferromagnetic phase transition in the background of Schwarzchild Anti-de Sitter (AdS) black hole. For this purpose, we introduce a massive 2−form coupled to the Power-Maxwell field. We perform the numerical shooting method in the probe limit by assuming the Power-Maxwell and the 2−form fields do not back react on the background geometry. We observe that increasing the strength of the power parameter causes the formation of magnetic moment in the black hole background harder and critical temperature lower. In the absence of external magnetic field and at the low temperatures, the spontaneous magnetization and the ferromagnetic phase transition happen. In this case, the critical exponent for magnetic moment is always 1/2 which is in agreement with the result from the mean field theory. In the presence of external magnetic field, the magnetic susceptibility satisfies the Cure-Weiss law.

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Insulator/metal phase transition and colossal magnetoresistance in holographic model

Cited by 19 publications

References 58 publications

Backreacted DBI magnetotransport with momentum dissipation

Backreacted DBI magnetotransport with momentum dissipation

Influence of inhomogeneities on holographic mutual information and butterfly effect

Holographic paramagnetic-ferromagnetic phase transition with Power-Maxwell electrodynamics

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