scholarly journals Hall conductivity of strained ℤ 2 crystals

2021 ◽  
pp. 2044034
Author(s):  
I. V. Fialkovsky ◽  
M. A. Zubkov
Keyword(s):  
Magnetic Field ◽  
Mechanical Stress ◽  
Topological Invariant ◽  
Hall Conductivity ◽  
Spatially Varying ◽  
2D And 3D

We establish topological nature of Hall conductivity of graphene and other [Formula: see text] crystals in 2D and 3D in the presence of inhomogeneous perturbations. To this end the lattice Weyl–Wigner formalism is employed. The nonuniform mechanical stress is considered, along with the spatially varying magnetic field. The relation of the obtained topological invariant to level counting is clarified.

COLLECTIVE FIELD THEORY TO MAGNETIC-FIELD-INDUCED SPIN-DENSITY-WAVE-STATE IN BECHGAARD SALTS, (TMTSF)2X

1993 ◽  
Vol 07 (19) ◽  
pp. 3415-3421 ◽  
Author(s):  
ALEXANDRE S. ROZHAVSKY
Keyword(s):  
Magnetic Field ◽  
Spin Density ◽  
Chemical Potential ◽  
Density Wave ◽  
Spin Density Wave ◽  
Hall Conductivity ◽  
Chiral Anomaly ◽  
Threshold Field ◽  
Wave State ◽  
Extended States

A field description of spin-density-wave (SDW) in a quasi-two-dimensional metal with open Fermi surface in magnetic field, is proposed. The SDW transition temperature, T c (H), and the Hall conductivity σxy, are calculated. The dependence T c (H) is found to be different from that of the Bardeen-Cooper-Schrieffer model, in particular, a threshold field, H c , found its natural explanation. It is proved that the quantized Hall conductivity arises from the chiral anomaly terms in the effective action provided there is pinning of chemical potential in the gap of extended states.

Magnetic field and mechanical stress tunable microwave properties of composites containing Fe-based microwires

2014 ◽  
Vol 104 (12) ◽  
pp. 121912 ◽  
Author(s):  
Y. Luo ◽  
H. X. Peng ◽  
F. X. Qin ◽  
B. J. P. Adohi ◽  
C. Brosseau
Keyword(s):  
Magnetic Field ◽  
Mechanical Stress ◽  
Microwave Properties ◽  
Tunable Microwave ◽  
Properties Of Composites

Start-up of a cyclotron with a spatially varying magnetic field

Atomic Energy ◽  
1960 ◽  
Vol 6 (6) ◽  
pp. 486-487
Author(s):  
D. P. Vasilevskaya ◽  
A. A. Glazov ◽  
V. I. Danilov ◽  
Yu. N. Denisov ◽  
V. P. Zhelepov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Start Up ◽  
Spatially Varying

scholarly journals Magneto- and Tensoresistance of the p Ge Compensated Crystals in the Range of Weak, Intermediate and Classically Strong Magnetic Fields

2016 ◽  
Vol 17 (1) ◽  
pp. 43-47 ◽  
Author(s):  
G.P. Gaidar
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Mechanical Stress ◽  
Elastic Deformation ◽  
Crystallographic Orientation ◽  
Longitudinal Axis ◽  
Mechanical Stresses ◽  
Strong Magnetic Fields ◽  
Compensation Factor

On the crystalsof compensatedp‑Ge (with the compensation factor of k = NSb/NGa = 0.5) the transverse (Н ^ (J // X)) magnetoresistance (within the magnetic fields of 0 < Н £ 22.3 kOe) at fixed values of the mechanical stresses Хі = 0; 0.2; 0.4; 0.6; 0.9; 1.1; 1.5 GPa were measured at 77 K. These mechanical stresses X created the elastic deformation along the samples, the crystallographic orientation of which coincided with the direction of [100]. Also at fixed magnetic field intensities Ні = 2; 4; 8; 10; 15; 20; 22.3 kOe the dependencies of resistivity  on the mechanical stress X, which coincides with the longitudinal axis of the crystal (X // J // [100]) and changes in the range of 0 £ Х £ 1.5 GPa, were measured. Last dependences characterized by the presence of a minimum in the range of X ~ 0.5 ¸ 0.6 GPa at the minimal magnetic field intensities Н = 2 kOe, which was shifted to the values of X ~ 0.2 ¸ 0.3 GPa with increasing Н up to 22.3 kOe.

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