45 citations · 121 across the 7 of their papers we have counts for
7 papers
Trembling motion of electrons driven by Larmor spin precession
I. Stepanov, M. Ersfeld, A. V. Poshakinskiy +4
We show that the initialization of an ensemble of electrons in the same spin state in strained n-InGaAs subject to a perpendicular magnetic field triggers an AC electric current at…
Twist angle dependent interlayer transfer of valley polarization from excitons to free charge carriers in WSe/MoSe heterobilayers
Frank Volmer, Manfred Ersfeld, Paulo E. Faria Junior +13
We identify an optical excitation mechanism that transfers a valley polarization from photo-excited electron-hole pairs to free charge carriers in twisted WSe/MoSe heterobi…
Valley lifetimes of conduction band electrons in monolayer WSe
Manfred Ersfeld, Frank Volmer, Lars Rathmann +10
One of the main tasks in the investigation of 2-dimensional transition metal dichalcogenides is the determination of valley lifetimes. In this work, we combine time-resolved Kerr r…
How the dynamic of photo-induced gate screening complicates the investigation of valley physics in 2D materials
F. Volmer, M. Ersfeld, L. Rathmann +6
An in-depth analysis of valley physics in 2D materials like transition metal dichalcogenides requires the measurement of many material properties as a function of Fermi level posit…
Unveiling valley lifetimes of free charge carriers in monolayer WSe
Manfred Ersfeld, Frank Volmer, Lars Rathmann +10
We report on nanosecond long, gate-dependent valley lifetimes of free charge carriers in monolayer WSe, unambiguously identified by the combination of time-resolved Kerr rotati…
Spin States Protected from Intrinsic Electron-Phonon-Coupling Reaching 100 ns Lifetime at Room Temperature in MoSe
Manfred Ersfeld, Frank Volmer, Pedro Miguel M. C. de Melo +6
We present time-resolved Kerr rotation measurements, showing spin lifetimes of over 100 ns at room temperature in monolayer MoSe. These long lifetimes are accompanied by an int…
All-electrical time-resolved spin generation and spin manipulation in n-InGaAs
I. Stepanov, S. Kuhlen, M. Ersfeld +2
We demonstrate all-electrical spin generation and subsequent manipulation by two successive electric field pulses in an n-InGaAs heterostructure in a time-resolved experiment at ze…