Temperature dependence of the Hall effect in monocrystalline magnesium

1977 ◽  
Vol 55 (18) ◽  
pp. 1621-1627 ◽  
Author(s):  
S. P. McAlister ◽  
J. E. A. Alderson ◽  
C. M. Hurd
Keyword(s):  
Fermi Surface ◽  
Temperature Dependence ◽  
Hall Effect ◽  
Path Integral ◽  
Basal Plane ◽  
Quantitative Interpretation ◽  
Cyclotron Motion ◽  
Temperature Range ◽  
Hall Resistivity ◽  
Magnetic Breakdown

The Hall resistivity ρ21(B,T) observed when [Formula: see text] and [Formula: see text] has been measured in monocrystals of Mg in the temperature range 1.7–300 K and in an applied flux up to 2 T. A quantitative interpretation when [Formula: see text] is made using a path integral calculation of the magnetoresistive tensor produced by representative orbits on a model Fermi surface. The results explain the origins of the principal features in the behaviour of ρ21(B,T), and show the importance of magnetic breakdown in cyclotron motion in the basal plane.

Electron motion and the Hall effect in monocrystalline zinc

1977 ◽  
Vol 55 (7-8) ◽  
pp. 620-628 ◽  
Author(s):  
C. M. Hurd ◽  
J. E. A. Alderson ◽  
S. P. McAlister
Keyword(s):  
Qualitative Analysis ◽  
Hall Effect ◽  
Path Integral ◽  
Basal Plane ◽  
Electron Motion ◽  
Cyclotron Motion ◽  
Transverse Magnetoresistance ◽  
Hall Resistivity ◽  
Magnetic Breakdown

The Hall resistivity ρ21(B, T) observed in Zn when [Formula: see text] and [Formula: see text] has been measured in fields B = 0.1–2.0 T and at temperatures T = 1.7–680 K. Supporting measurements of the transverse magnetoresistance have also been made at 1.7 K. A qualitative analysis of ρ21(B, T) is given separately for the cases when the cyclotron motion is confined to an axial or to the basal plane. In the latter case, the discussion is supported by path integral calculations based upon model orbits chosen to imitate all the geometrical possibilities arising from magnetic breakdown between the monster and needle sheets. The results provide an explanation of the principal features shown by ρ21(B, T).

Intermediate-field effects and electron motion in an axial plane in cadmium

1976 ◽  
Vol 54 (18) ◽  
pp. 1866-1879 ◽  
Author(s):  
J. E. A. Alderson ◽  
C. M. Hurd ◽  
S. P. McAlister
Keyword(s):  
Saddle Point ◽  
Path Integral ◽  
Field Condition ◽  
Basal Plane ◽  
Axial Plane ◽  
Electron Motion ◽  
Hall Resistivity ◽  
Magnetic Breakdown ◽  
Intermediate Field ◽  
Closed Electron

The Hall resistivity ρ21(B,T) observed in Cd when B lies in the basal plane has been measured in fields B = 0.1–2.4 T and at temperatures T = 1.7–560 K. The behaviour of ρ21(B,T) in the intermediate-field condition is analysed first qualitatively in terms of contributions arising from features such as intersheet scattering, magnetic breakdown, open and saddle-point orbits, as well as closed electron and hole orbits. These qualitative conclusions are supported by a path integral calculation of the magnetoresistive tensor that is produced by model orbits chosen to imitate the principal contributors to conduction in an axial plane. The results provide an explanation of the origins of the principal features seen in the behaviour of ρ21(B,T) when [Formula: see text].

Specific features of the temperature dependence of tryptophan fluorescence lifetime in the temperature range of −170–20 °C

2020 ◽  
Vol 393 ◽  
pp. 112435
Author(s):  
Peter P. Knox ◽  
Vladimir V. Gorokhov ◽  
Boris N. Korvatovsky ◽  
Nadezhda P. Grishanova ◽  
Sergey N. Goryachev ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Fluorescence Lifetime ◽  
Tryptophan Fluorescence ◽  
Temperature Range

Temperature dependence of chlorine-35 N.Q.R. in 2,6-Dichlorophenol

1978 ◽  
Vol 31 (4) ◽  
pp. 791 ◽  
Author(s):  
R Chandramani ◽  
SP Basavaraju ◽  
N Devaraj
Keyword(s):  
Temperature Dependence ◽  
Room Temperature ◽  
Temperature Range ◽  
Temperature Coefficients ◽  
Brown's Method

Chlorine n.q.r, in 2,6-dichlorophenol has been investigated at temperatures from 77 K to room temperature. Two resonance lines due to chemically inequivalent sites have been observed throughout this temperature range. Torsional frequencies of the molecule have been calculated at temperatures from 77 to 300 K according to Bayer's theory and Brown's method. Also the temperature coefficients of the torsional frequencies have been calculated.

scholarly journals PSEUDO-GAP FEATURES OF INTRINSIC TUNNELING IN (HgBr2)-Bi2212 SINGLE CRYSTALS

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3758-3763 ◽  
Author(s):  
AUGUST YURGENS ◽  
DAG WINKLER ◽  
TORD CLAESON ◽  
SEONG-JU HWANG ◽  
JIN-HO CHOY
Keyword(s):  
Temperature Dependence ◽  
Single Crystals ◽  
Room Temperature ◽  
Unit Cell ◽  
Superconducting Gap ◽  
Axis Direction ◽  
Temperature Range ◽  
Dynamic Conductance

The c-axis tunneling properties of both pristine Bi2212 and its HgBr 2 intercalate have been measured in the temperature range 4.2-250 K. Lithographically patterned 7-10 unit-cell heigh mesa structures on the surfaces of these single crystals were investigated. Clear SIS-like tunneling curves for current applied in the c-axis direction have been observed. The dynamic conductance d I/ d V(V) shows both sharp peaks corresponding to a superconducting gap edge and a dip feature beyond the gap, followed by a wide maximum, which persists up to a room temperature. Shape of the temperature dependence of the c-axis resistance does not change after the intercalation suggesting that a coupling between CuO 2-bilayers has little effect on the pseudogap.

TI/PIMC METHOD WITH THE TAKAHASHI–IMADA APPROXIMATION FOR THE EQUILIBRIUM CONSTANT OF THE O + HCl ⇌ OH + Cl REACTION

2013 ◽  
Vol 12 (04) ◽  
pp. 1350026 ◽  
Author(s):  
MARCIN BUCHOWIECKI
Keyword(s):  
Monte Carlo ◽  
Temperature Dependence ◽  
Equilibrium Constant ◽  
Path Integral ◽  
Thermodynamic Integration ◽  
Partition Functions ◽  
Integration Path ◽  
Path Integral Monte Carlo

The thermodynamic integration/path integral Monte Carlo (TI/PIMC) method of calculating the temperature dependence of the equilibrium constant quantum mechanically is applied to O + HCl ⇌ OH + Cl reaction. The method is based upon PIMC simulations for energies of the reactants and the products and subsequently on thermodynamic integration for the ratios of partition functions. PIMC calculations are performed with the primitive approximation (PA) and the Takahashi–Imada approximation (TIA).

The Design of AlGaN/GaN HEFT-Micro-Accelerometer and Temperature- Dependence Electrical Performance

2011 ◽  
Vol 483 ◽  
pp. 174-179 ◽  
Author(s):  
Ting Liang ◽  
Jian Jun Tang ◽  
Qian Qian Zhang ◽  
Yong Wang ◽  
Jing Li ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Electrical Performance ◽  
Saturation Current ◽  
Temperature Range ◽  
Different Temperatures ◽  
Piezoresistance Coefficient ◽  
Micro Accelerometer

In this paper, We use a novel principle to detect acceleration and report how I-V characteristics and piezoresistance coefficient of AlGaN/GaN HEFT-micro-accelerometer are affected by setting different temperatures. It is shown that saturation current of device would go down if the temperature goes up, which is about 0.028mA/°C, based on the research. However, the device can work well at the temperature range of -50°C to 50°C, which indicates that it can work safely in the larger temperature range.

NQR and Crystal Structure of 4,5-Dichloroimidazole, C3H2N2Cl2

1992 ◽  
Vol 47 (1-2) ◽  
pp. 177-181 ◽  
Author(s):  
Shi-Qi Dou ◽  
Alarich Weiss
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Temperature Dependence ◽  
Room Temperature ◽  
Unit Cell ◽  
Space Group ◽  
Temperature Range ◽  
Temperature Coefficients ◽  
Group D

AbstractThe two line 35Cl NQR spectrum of 4,5-dichloroimidazole was measured in the temperature range 77≦ T/K ≦ 389. The temperature dependence of the NQR frequencies conforms with the Bayer model and no phase transition is indicated in the curves v ( 35Cl)= f(T). Also the temperature coefficients of the 35Cl NQR frequencies are "normal". At 77 K the 35Cl NQR frequencies are 37.409 MHz and 36.172 MHz and at 389 K 35.758 MHz and 34.565 MHz. The compound crystallizes at room temperature with the tetragonal space group D44-P41212, Z = 8 molecules per unit cell; at 295 K : a = 684.2(5) pm, c = 2414.0(20) pm. The relations between the crystal structure and the NQR spectrum are discussed.

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