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51 papers · 1 filter
High Magnetic Field NMR Studies of LiVGeO, a quasi 1-D Spin System
P. Vonlanthen, K. B. Tanaka, Atsushi Goto +12
We report Li pulsed NMR measurements in polycrystalline and single crystal samples of the quasi one-dimensional S=1 antiferromagnet LiVGeO, whose AF transition temper…
Effects of a Parallel Magnetic Field on the Metal-Insulator Transition in a Dilute Two-Dimensional Electron System
Kevin Eng, X. G. Feng, Dragana Popovic +1
The temperature dependence of conductivity of a two-dimensional electron system in silicon has been studied in parallel magnetic fields B. At B=0, the system displays a meta…
Detailed single crystal EPR lineshape measurements for the single molecule magnets Fe8Br and Mn12-ac
S. Hill, S. Maccagnano, K. Park +3
It is shown that our multi-high-frequency (40-200 GHz) resonant cavity technique yields distortion-free high field EPR spectra for single crystal samples of the uniaxial and biaxia…
A Phase Glass is a Bose Metal: New Conducting State in 2D
Denis Dalidovich, Philip Phillips
In the quantum rotor model with random exchange interactions having a non-zero mean, three phases, a 1) phase (Bose) glass, 2) superfluid, and 3) Mott insulator, meet at a bi-criti…
Binding Energy of Charged Excitons in ZnSe-based Quantum Wells
G. V. Astakhov, D. R. Yakovlev, V. P. Kochereshko +9
Excitons and charged excitons (trions) are investigated in ZnSe-based quantum well structures with (Zn,Be,Mg)Se and (Zn,Mg)(S,Se) barriers by means of magneto-optical spectroscopy.…
Diluted Magnetic Semiconductors in the Low Carrier Density Regime
R. N. Bhatt, Mona Berciu, Malcolm P. Kennett +1
This paper, based on a presentation at the Spintronics 2001 conference, provides a review of our studies on II-VI and III-V Mn-doped Diluted Magnetic Semiconductors. We use simple…