Magnetocaloric effect, magnetic susceptibility and specific heat of tuned quantum dot/ring systems

Sedehi, H. R. Rastegar; Khordad, R.

doi:10.1016/j.physe.2021.114886

Cited by 29 publications

(12 citation statements)

References 33 publications

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“…The Hamiltonian of the stationary electron in the system [24] under the effective mass approximation mode, it is…”

Section: ( ) [ ( ) ( )] /mentioning

confidence: 99%

Effects of hydrostatic pressure and temperature on refractive index changes in tuned quantum dots under magnetic field

Chang¹,

Li²,

Duan³

et al. 2022

Phys. Scr.

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The effects of external magnetic field, hydrostatic pressure, temperature and radius of the quantum dots (QDs) on refractive index changes (RICs) of tuned QDs are studied in detail theoretically. In the framework of effective mass approximation, energy levels and wave functions are derived. Simultaneously, the nonlinear RICs are obtained by compact-density-matrix approach and iterative method. Then, the numerical simulations show that under various constraint factors, the resonant peak position of RICs moves to high energy or low energy, that is, blue shift or red shift, and the peak value of RICs will also alter with the change of parameters.

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“…The Hamiltonian of the stationary electron in the system [24] under the effective mass approximation mode, it is…”

Section: ( ) [ ( ) ( )] /mentioning

confidence: 99%

Effects of hydrostatic pressure and temperature on refractive index changes in tuned quantum dots under magnetic field

Chang¹,

Li²,

Duan³

et al. 2022

Phys. Scr.

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“…Diatomic oscillators and atomic potential energy functions are important in the subject of molecular spectroscopy and quantum mechanics due to the information they provide about the quantum states of atoms and molecules of interest. For instance, by solving the wave equation within the non-relativistic and relativistic regimes, under potential functions, many physical properties of systems such as optical, magnetic, electrical, thermodynamic and thermo-chemical properties among others have been investigated [ 9 , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] ].…”

Section: Introductionmentioning

confidence: 99%

Energy eigenvalues and finite-temperature magnetization for the improved Scarf II potential in the presence of external magnetic and Aharonov-Bohm flux fields

Eyube,

Notani,

Onate

et al. 2023

Heliyon

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“…The MCE has been studied in a quantum dot array where the material temperature variation due to the external magnetic field change has been analyzed for controllable additional effects: geometric confinement, Zeeman, spin-orbit coupling, electric field, and Rashba effect [56,57]. These effects either enhance the thermal effect or cause the system to respond directly or inversely, making it an ideal platform for technological sensors [58].…”

Section: Introductionmentioning

confidence: 99%

Caloric Effect Due to the Aharonov–Bohm Flux in an Antidot

Martínez-Rojas,

Benavides-Vergara,

Peña

et al. 2023

Nanomaterials

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In this work, we report the caloric effect for an electronic system of the antidot type, modeled by combining a repulsive and attractive potential (parabolic confinement). In this system, we consider the action of a perpendicular external magnetic field and the possibility of having an Aharonov–Bohm flux (AB-flux) generated by a current passing through a solenoid placed inside the forbidden zone for the electron. The energy levels are obtained analytically, and the model is known as the Bogachek and Landman model. We propose to control the caloric response of the system by varying only the AB-flux, finding that, in the absence of an external magnetic field, the maximization of the effect always occurs at the same AB-flux intensity, independently of the temperature, while fixing the external magnetic field at a non-zero value breaks this symmetry and changes the point where the caloric phenomenon is maximized and is different depending on the temperature to which the process is carried. Our calculations indicate that using an effective electron mass of GaAs heterostructures and a trap intensity of the order of 2.896 meV, the modification of the AB-flux achieves a variation in temperature of the order of 1 K. Our analysis suggests that increasing the parabolic confinement twofold increases the effect threefold, while increasing the antidot size generates the reverse effect, i.e., a strong decrease in the caloric phenomenon under study. Due to the great diversity in technological applications that have antidots in electronics, the possibility of controlling their thermal response simply by varying the intensity of the internal current inside the solenoid (i.e., the intensity of AB-flux) can be a platform of interest for experimental studies.

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Magnetocaloric effect, magnetic susceptibility and specific heat of tuned quantum dot/ring systems

Cited by 29 publications

References 33 publications

Effects of hydrostatic pressure and temperature on refractive index changes in tuned quantum dots under magnetic field

Effects of hydrostatic pressure and temperature on refractive index changes in tuned quantum dots under magnetic field

Energy eigenvalues and finite-temperature magnetization for the improved Scarf II potential in the presence of external magnetic and Aharonov-Bohm flux fields

Caloric Effect Due to the Aharonov–Bohm Flux in an Antidot

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