Experimental discovery and theoretical description of the anomalous hall effect in a spontaneously polarized electron system of hybridized impurity states

Lonchakov, A. T.; Okulov, V. I.; Govorkova, T. E.; Andriichuk, M. D.; Paranchich, L. D.

doi:10.1134/s0021364012180075

Cited by 15 publications

(11 citation statements)

References 4 publications

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“…From the beginning of considering we choose as initial a well known formula for the density vector of equilibrium magnetization M of quantum system of electrons 1 (1)…”

Section: Equilibrium Conduction Currentmentioning

confidence: 99%

“…In this expression as a term of local equilibrium current there enters well known contribution of local equilibrium to the Hall current with conductivity L H  , which is predominant in high magnetic field and also the contribution of spontaneous magnetization with the conductivity m  revealed first in work [1], and the contribution of equilibrium conduction current…”

Section: The Hall Currentmentioning

confidence: 99%

“…Necessity of such researches has been explicit after revealing in [1] the contribution to the Hall resistance of semiconductor from spontaneous magnetization of donor electrons of iron impurities of very low concentrations. Such low concentration does not admit ordinary explanation of the given effect by the manifestation of spin-orbital interaction.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic aspects of describing the contribution of spontaneous magnetism of electrons to the Hall resistance

Okulov¹,

Pamyatnykh²

2018

EPJ Web Conf.

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On the base of the analysis of quantum-statistical description of the magnetization of electron system containing the spontaneous spin polarization contribution there were found the magnetization and conduction current densities in equilibrium state. It has been shown that equilibrium surface conduction current ensures realization of demagnetization effects but in local equilibrium state determines local equilibrium part of the Hall conductivity. As a result one is given the justification of influence of the spontaneous magnetization on galvanomagnetic effects, which is not related to spin-orbital interaction.

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“…From the beginning of considering we choose as initial a well known formula for the density vector of equilibrium magnetization M of quantum system of electrons 1 (1)…”

Section: Equilibrium Conduction Currentmentioning

confidence: 99%

Section: The Hall Currentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic aspects of describing the contribution of spontaneous magnetism of electrons to the Hall resistance

Okulov¹,

Pamyatnykh²

2018

EPJ Web Conf.

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“…Of particular interest are systems with the hybridization of electronic 3d states of an impurity atom with the states in the conduction band of the crystal. A series of investigations of a number of effects involving this type of hybridization [3][4][5][6][7] revealed that, in mercury selenide crystals doped with iron impurities, there is a spontaneous spin polariza tion of conduction electrons, which manifests itself in the anomalous Hall effect [8]. Moreover, there is a reliable evidence for the spin polarization in crystals with other 3d impurities.…”

Section: Introductionmentioning

confidence: 99%

Temperature anomaly of the coefficient of ultrasonic absorption by electrons of hybridized states of cobalt impurities in mercury selenide

et al. 2015

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The effects of the interaction of ultrasound with donor d electrons of cobalt impurity atoms at low concentrations in mercury selenide crystals have been investigated. The temperature dependences of the electronic contribution to the absorption coefficient at a frequency of 53 MHz in crystals with cobalt concen trations from 10 18 to 10 20 cm -3 and in the undoped crystal have been observed experimentally. It has been found that crystals with impurities are characterized by an anomalous nonmonotonic temperature depen dence of the absorption coefficient of the slow transverse wave in a narrow temperature range near 10 K. A smooth monotonic temperature dependence has been observed for longitudinal and fast transverse waves. Based on the developed theoretical interpretation, it has been established that the anomaly in the temperature dependence of the absorption coefficient of a slow transverse wave is associated with the hybridization of impurity d states in the conduction band of the crystal. A comparison of the theoretical and experimental dependences has made it possible to determine the parameters characterizing the hybridized electronic states.

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“…This has been confirmed by room-temperature experiments on mercury selenide with iron impurities. 10 Thus, there is reason to assume that the predicted spontaneous spin polarization does exist and the above interpretation of the anomalous Hall effect discussed here may serve as a basis for further research. …”

Section: Detecting Spontaneous Polarization Of Hybridized States In Imentioning

confidence: 99%

Experimental observation of spontaneous spin polarization of electrons in hybridized states of transition element impurities in semiconductors

Okulov

Govorkova

Жевстовских

et al. 2013

Low Temperature Physics

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Experimental evidence of the possible existence of spontaneous spin polarization of the electron system in hybridized states formed by transition element impurity atoms in the conduction band of semiconducting crystals is examined. The details of a quantitative interpretation of experiments on the temperature dependence of the specific heat and elastic moduli of mercury selenide crystals with iron impurities confirm the feasibility of establishing the presence of electron spin polarization in this type of experiment, as well as the possible existence of polarization in the crystals studied here. Theoretical arguments support the observation of a thermodynamic anomalous Hall effect owing to spontaneously polarized donor electrons from low-concentration impurities. V C 2013 AIP Publishing LLC [http://dx

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Experimental discovery and theoretical description of the anomalous hall effect in a spontaneously polarized electron system of hybridized impurity states

Cited by 15 publications

References 4 publications

Thermodynamic aspects of describing the contribution of spontaneous magnetism of electrons to the Hall resistance

Thermodynamic aspects of describing the contribution of spontaneous magnetism of electrons to the Hall resistance

Temperature anomaly of the coefficient of ultrasonic absorption by electrons of hybridized states of cobalt impurities in mercury selenide

Experimental observation of spontaneous spin polarization of electrons in hybridized states of transition element impurities in semiconductors

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