Temperature and Magnetic Field Dependence of the Lifetime of Resonantly Excited 2D Carriers in Magnetic Fields up to 25 T Studied Using Picosecond Time-Resolved Photoluminescence

Abstract The effect of an external magnetic field on the decay of an excited single rotational state of the 1Au electronic state of biacetyl is observed in a hypersonic jet experiment after narrow bandwidth laser excitation. The lifetime of the ex-cited state decreases already at low magnetic fields and the molecular quantum beat vanishes.

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Magnetic field dependence of spin dynamics of radical pairs studied by time-resolved RYDMR

Molecular Physics ◽

10.1080/00268970110109772 ◽

2002 ◽

Vol 100 (8) ◽

pp. 1129-1135 ◽

Cited By ~ 4

Author(s):

YOSHIO SAKAGUCHI

Keyword(s):

Magnetic Field ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Spin Dynamics ◽

Radical Pairs ◽

Time Resolved

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Fluctuation Effects of Magnetohydrodynamic Micro-Vortices on Odd Chirality in Magnetoelectrolysis

Magnetochemistry ◽

10.3390/magnetochemistry6030043 ◽

2020 ◽

Vol 6 (3) ◽

pp. 43

Author(s):

Iwao Mogi ◽

Ryoichi Aogaki ◽

Kohki Takahashi

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Ionic Currents ◽

Copper Films ◽

Field Polarity ◽

Vortex Model ◽

Self Organized ◽

The Magnetic Field

The magnetic field dependence of chiral surface formation was investigated in magnetoelectrodeposition (MED) and magnetoelectrochemical etching (MEE) of copper films. The MED and MEE was conducted in magnetic fields of up to 5 T, which were parallel or antiparallel to the ionic currents. The MED films prepared in high magnetic fields of 5 and 3 T exhibited odd chirality for magnetic field polarity, as expected on the basis of the magnetohydrodynamic (MHD) vortex model. However, the films prepared in the lower fields of 2.5 and 2 T exhibited breaking of odd chirality. Similar magnetic field dependence was observed in the surface chirality of MEE films. These results imply that the fluctuation in the self-organized state of micro-MHD vortices is responsible for the breaking of odd chirality.

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Pion decay in magnetic fields

EPJ Web of Conferences ◽

10.1051/epjconf/201817513005 ◽

2018 ◽

Vol 175 ◽

pp. 13005 ◽

Cited By ~ 3

Author(s):

Gunnar S. Bali ◽

Bastian B. Brandt ◽

Gergely Endrődi ◽

Benjamin Gläße

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Decay Rate ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Charged Pion ◽

Pion Decay ◽

Total Decay Rate ◽

Decay Constants ◽

The Magnetic Field

The leptonic decay of the charged pion in the presence of background magnetic fields is investigated using quenched Wilson fermions. It is demonstrated that the magnetic field opens up a new channel for this decay. The magnetic field-dependence of the decay constants for both the ordinary and the new channel is determined. Using these inputs from QCD, we calculate the total decay rate perturbatively.

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Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states

Science ◽

10.1126/science.abf1513 ◽

2021 ◽

Vol 373 (6550) ◽

pp. 82-88

Author(s):

Marco Valentini ◽

Fernando Peñaranda ◽

Andrea Hofmann ◽

Matthias Brauns ◽

Robert Hauschild ◽

...

Keyword(s):

Magnetic Field ◽

Quantum Dots ◽

Magnetic Fields ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Junction Region ◽

Zero Bias ◽

Zero Modes ◽

Majorana Modes ◽

Shell Nanowires

A semiconducting nanowire fully wrapped by a superconducting shell has been proposed as a platform for obtaining Majorana modes at small magnetic fields. In this study, we demonstrate that the appearance of subgap states in such structures is actually governed by the junction region in tunneling spectroscopy measurements and not the full-shell nanowire itself. Short tunneling regions never show subgap states, whereas longer junctions always do. This can be understood in terms of quantum dots forming in the junction and hosting Andreev levels in the Yu-Shiba-Rusinov regime. The intricate magnetic field dependence of the Andreev levels, through both the Zeeman and Little-Parks effects, may result in robust zero-bias peaks—features that could be easily misinterpreted as originating from Majorana zero modes but are unrelated to topological superconductivity.

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Searching strong ‘spin’-orbit coupled one-dimensional hole gas in strong magnetic ﬁelds

Journal of Physics Condensed Matter ◽

10.1088/1361-648x/ac37da ◽

2021 ◽

Author(s):

Rui Li

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Strong Magnetic Field ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Large Field ◽

Spin Orbit ◽

One Dimensional ◽

Small Magnetic Field ◽

Strong Spin

Abstract We show that a strong `spin'-orbit coupled one-dimensional (1D) hole gas is achievable via applying a strong magnetic field to the original two-fold degenerate (spin degeneracy) hole gas confined in a cylindrical Ge nanowire. Both strong longitudinal and strong transverse magnetic fields are feasible to achieve this goal. Based on quasi-degenerate perturbation calculations, we show the induced low-energy subband dispersion of the hole gas can be written as $E=\hbar^{2}k^{2}_{z}/(2m^{*}_{h})+\alpha\sigma^{z}k_{z}+g^{*}_{h}\mu_{B}B\sigma^{x}/2$, a form exactly the same as that of the electron gas in the conduction band. Here the Pauli matrices $\sigma^{z,x}$ represent a pseudo spin (or `spin' ), because the real spin degree of freedom has been split off from the subband dispersions by the strong magnetic field. Also, for a moderate nanowire radius $R=10$ nm, the induced effective hole mass $m^{*}_{h}$ ($0.065\sim0.08~m_{e}$) and the `spin'-orbit coupling $\alpha$ ($0.35\sim0.8$ eV~\AA) have a small magnetic field dependence in the studied magnetic field interval $1<B<15$ T, while the effective $g$-factor $g^{*}_{h}$ of the hole `spin' only has a small magnetic field dependence in the large field region.

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