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  1. No Access

    Article

    Electronic Phase Transitions in F-electron Metals at High Pressures: Synchrotron X-ray Spectroscopic Studies on GD to 100 GPa

    Unusual phase transitions driven by electron correlation effects occur in many f-electron metals (lanthanides and actinides alike) from localized phases to itinerant phases at high pressures. The dramatic changes...

    Choong-Shik Yoo, Brian Maddox, Valentin Iota in MRS Online Proceedings Library (2008)

  2. No Access

    Article

    Six-fold coordinated carbon dioxide VI

    Under standard conditions, carbon dioxide (CO2) is a simple molecular gas and an important atmospheric constituent, whereas silicon dioxide (SiO2) is a covalent solid, and one of the fundamental minerals of the p...

    Valentin Iota, Choong-Shik Yoo, Jae-Hyun Klepeis, Zsolt Jenei… in Nature Materials (2007)

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    Article

    High-pressure investigation of InGan quantum wells

    We have studied the pressure dependence of photoluminescence for various InGaN quantum wells of different Indium compositions. In contrast to classical quantum well systems such as GaAs/AlGaAs, the pressure co...

    Piotr Perlin, Valentin Iota, Bernie A. Weinstein… in MRS Online Proceedings Library (1998)

  4. No Access

    Article

    Cubic InN Inclusions as the Cause for the Unusually Weak Pressure Shift of the Luminescence in InGaN

    We propose a new approach to explain the unusually low pressure coefficients of the luminescence peaks observed in single-quantum-well InGaN-based light emitting diodes manufactured by Nichia Chemical Industri...

    Piotr Perlin, Bernard A. Weinstein, Niels E. Christensen… in MRS Online Proceedings Library (1997)