P.-C. Ho
University of California, San Diego
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Publication
Featured researches published by P.-C. Ho.
Physical Review B | 2009
M. M. Qazilbash; M. Brehm; G. O. Andreev; Alex Frenzel; P.-C. Ho; Byung-Gyu Chae; Bong-Jun Kim; Sun Jin Yun; Hyun-Tak Kim; Alexander V. Balatsky; Oleg Shpyrko; M. B. Maple; Fritz Keilmann; D. N. Basov
We present a detailed infrared study of the insulator-to-metal transition IMT in vanadium dioxide VO2 thin films. Conventional infrared spectroscopy was employed to investigate the IMT in the far field. Scanning near-field infrared microscopy directly revealed the percolative IMT with increasing temperature. We confirmed that the phase transition is also percolative with cooling across the IMT. We present extensive near-field infrared images of phase coexistence in the IMT regime in VO2. We find that the coexisting insulating and metallic regions at a fixed temperature are static on the time scale of our measurements. A distinctive approach for analyzing the far-field and near-field infrared data within the Bruggeman effective medium theory was employed to extract the optical constants of the incipient metallic puddles at the onset of the IMT. We found divergent effective carrier mass in the metallic puddles that demonstrates the importance of electronic correlations to the IMT in VO2. We employ the extended dipole model for a quantitative analysis of the observed near-field infrared amplitude contrast and compare the results with those obtained with the basic dipole model.
Physical Review B | 2005
W.M. Yuhasz; N. A. Frederick; P.-C. Ho; N. P. Butch; B.J. Taylor; T. A. Sayles; M. B. Maple; J. B. Betts; A. Lacerda; P. Rogl; Gerald Giester
The filled skutterudite compound
Physical Review B | 2004
N. A. Frederick; T. D. Do; P.-C. Ho; N. P. Butch; V. S. Zapf; M. B. Maple
\mathrm{Sm}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}
Physical Review B | 2005
P.-C. Ho; W.M. Yuhasz; N. P. Butch; N. A. Frederick; T. A. Sayles; J. R. Jeffries; M. B. Maple; J. B. Betts; A. Lacerda; P. Rogl; Gerald Giester
was prepared in single-crystal form and characterized using x-ray diffraction, specific-heat, electrical resistivity, and magnetization measurements. The
Journal of Physics: Condensed Matter | 2008
R. E. Baumbach; P.-C. Ho; T. A. Sayles; M. B. Maple; R. Wawryk; T. Cichorek; A. Pietraszko; Z. Henkie
\mathrm{Sm}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}
Physical Review B | 2006
W.M. Yuhasz; N. P. Butch; T. A. Sayles; P.-C. Ho; J. R. Jeffries; Tatsuya Yanagisawa; N. A. Frederick; M. B. Maple; Z. Henkie; A. Pietraszko; S. McCall; M. W. McElfresh; M.J. Fluss
crystals have the
Journal of Physics: Condensed Matter | 2007
W.M. Yuhasz; P.-C. Ho; T. A. Sayles; Tatsuya Yanagisawa; N. A. Frederick; M. B. Maple; P. Rogl; Giester G
\mathrm{La}{\mathrm{Fe}}_{4}{\mathrm{P}}_{12}
Proceedings of the National Academy of Sciences of the United States of America | 2008
R. E. Baumbach; P.-C. Ho; T. A. Sayles; M. B. Maple; R. Wawryk; T. Cichorek; A. Pietraszko; Z. Henkie
-type structure with lattice parameter
Physical Review B | 2008
Johnpierre Paglione; P.-C. Ho; M. B. Maple; M. A. Tanatar; Louis Taillefer; Yoonhee Lee; C. Petrovic
a=9.3085\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}
Physical Review B | 2014
Kevin Huang; Lei Shu; I. K. Lum; B. D. White; M. Janoschek; D. Yazici; J. J. Hamlin; D. A. Zocco; P.-C. Ho; R. E. Baumbach; M. B. Maple
. Specific-heat measurements indicate a large electronic specific-heat coefficient of
