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Magnetocapacitance

About: Magnetocapacitance is a research topic. Over the lifetime, 497 publications have been published within this topic receiving 23846 citations.


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TL;DR: In this paper, the population of up to four subbands with well-resolved Rashba spin splitting in the Fourier transforms was studied experimentally (by magnetocapacitance spectroscopy) and theoretically for carrier surface density up to 6×1012 cm-2.
Abstract: Two-dimensional electron gas at the anodic oxide-HgTe(110) interface is studied experimentally (by the magnetocapacitance spectroscopy method) and theoretically for carrier surface density up to 6×1012 cm-2. The measurements show the population of up to four subbands with well-resolved Rashba spin splitting in the Fourier transforms. The carrier distribution among the electric subbands agrees with the theory. However, the experimental relative differences of occupancies of spin sub-subbands (0.17-0.3) exceed the calculated ones (0.14). This discrepancy indicates an interface contribution to the spin-orbit splitting. The partial capacitance oscillations for different spin branches in the ground subband differ not only in period but also in amplitude. Because of this, the measured effective cyclotron masses in this subband correspond to the theoretical values for the high-energy spin branch whereas in the excited subbands each corresponds to an average over two branches.

5 citations

Journal ArticleDOI
TL;DR: In this article, the magnetic and dielectric properties of the quasi-two-dimensional triangular lattice system CuCrS2 and its B-site-diluted analogs CuAl1−xCrxS2 (x = 0.01 and x =0.02) are investigated.
Abstract: In this paper, magnetic and dielectric properties of the quasi-two-dimensional triangular-lattice system CuCrS2 and its B-site-diluted analogs CuAl1−xCrxS2 (x = 0.01 and x = 0.02) are investigated. Antiferromagnetic phase transition is observed at about 38.5 K by magnetization measurement without shift induced by a small amount of doping Al. Magnetodielectric effect is found near TN in each of the three compounds. The dielectric constant decreases and the magnetocapacitance increases with the increase of substitution of nonmagnetic Al3+ ions for the magnetic Cr3+ ions. The negative magnetocapacitive effect reaches ~ 13% for CuAl0.02Cr0.98S2.

5 citations

Journal ArticleDOI
TL;DR: A superconducting layer exposed to a perpendicular electric field and a parallel magnetic field is considered within the Ginzburg-Landau (GL) approach in this paper, where the GL equation is solved near the surface and the surface energy is calculated.
Abstract: A superconducting layer exposed to a perpendicular electric field and a parallel magnetic field is considered within the Ginzburg-Landau (GL) approach. The GL equation is solved near the surface and the surface energy is calculated. The nucleation critical field of superconducting state at the surface depends on the magnetic and electric fields. Special consideration is paid to the induced magnetic-field effect cause d by diamagnetic surface currents. The latter effect is strongly dependent on the thickness of the sample. The effective inverse capacitance determines the effective penetration depth. It is found that the capacitance exhibits a jump at the surface critical field. An experiment is suggested for determining the change in the effective capacitance of the layer.

5 citations

Journal ArticleDOI
TL;DR: In this paper, the influence of microwave irradiation on two-dimensional electrons was studied using capacitance measurements in GaAs quantum well samples where the gate covers a central part of the layer, and it was shown that the capacitance oscillations at high magnetic fields, caused by the oscillations of thermodynamic density of states, are not essentially modified by microwaves.
Abstract: To study the influence of microwave irradiation on two-dimensional electrons, we apply a method based on capacitance measurements in GaAs quantum well samples where the gate covers a central part of the layer. We find that the capacitance oscillations at high magnetic fields, caused by the oscillations of thermodynamic density of states, are not essentially modified by microwaves. However, in the region of fields below 1 T, we observe another set of oscillations, with the period and the phase identical to those of microwave-induced resistance oscillations. The phenomenon of microwave-induced capacitance oscillations is explained in terms of violation of the Einstein relation between conductivity and the diffusion coefficient in the presence of microwaves, which leads to a dependence of the capacitor charging on the anomalous conductivity. We also observe microwave-induced oscillations in the capacitive response to periodic variations of external heating. These oscillations appear due to the thermoelectric effect and are in antiphase with microwave-induced resistance oscillations because of the Corbino-like geometry of our experimental setup.

5 citations

Journal ArticleDOI
TL;DR: In this paper, the quantum magnetocapacitance (MC) for n-type monolayer MoS2 under a perpendicular magnetic field was investigated and it was shown that the MC clearly reflects the valley- and spin-resolved Landau levels (LLs).
Abstract: We present a theoretical investigation on the quantum magnetocapacitance (MC) for n-type monolayer MoS2 under a perpendicular magnetic field. We find that the MC clearly reflects the valley- and spin-resolved Landau levels (LLs). Interestingly, the MC is fully valley- and spin-polarized, which results in perfect square-wave-shaped polarization. This fully valley- and spin-polarized MC, especially the peak corresponding to the lowest LL, may be of great significance in valleytronic and spintronic device applications because it provides a magnetic method to control the electron valley and spin degrees of freedom. The MC behavior as a function of the magnetic field is also discussed.

5 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20235
202212
202113
202020
201921
201819