X-ray scattering by 2H-NbSe2 in CDW-regime

Full text: Here we present X-ray scattering measurements in commercial diffractometer with the original continuous-flow cryostat were performed in the temperature range 10-300 K at CuK alpha in the 1eV energy window which reveal new system of peaks on diffraction patterns below transition to the charge density wave state (TCDW = 32.5 K). They are characterized by complicated hierarchy, time and temperature dependence. The most fascinating feature is anomalously high intensity with drastic disappearance during heating immediately at TCDW. Comparison with a high-resolution neutron diffraction measurements is discussed. (authors)