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LORTZ Rolf Walter 洛鶴夫
PhD, University of Karlsruhe, Germany
Associate Professor
Personal Home Page
Tel 2358 7491
Fax 2358 1652
Email lortz
Office Room 4478
Professor Rolf Walter Lortz obtained his diploma degree (equivalent to MPhil) in physics with honors (1999) and his PhD degree (2002) from the University of Karlsruhe in Germany (now Karlsruhe Institute of Technology). After one year of postdoc in the Institute of Solid State Physics in the Research Center of Karlsruhe, he took up a position as Senior Research and Teaching Associate ("Maitre Assistant") in the Condensed Matter Physics Department of the University of Geneva from 2003 to 2008. He joined the Physics Department of HKUST in 2008. Prof Lortz received 2015 School of Science Teaching Award.

Professor Lortz’s laboratory is specialized in thermodynamic and electric transport experiments on unconventional superconductors and materials with novel electronic properties. It is equipped with state-of the art experimental techniques for high-resolution specific heat, DC magnetization and thermal expansion measurements, point-contact spectroscopy, thermoelectrical transport, high pressure experiments, experiments in high magnetic fields and at low temperatures down to 250 mK. His research interests include topological superconductivity, interfacial superconductivity, low dimensional superconductivity in carbon nanotubes and ultrathin nanowire arrays, exotic magnetic-field-induced superconducting phases such as the Fulde-Ferrell-Larkin-Ovchinnikov state, materials with strong electronic correlations, quantum magnetism and magnetic skyrmion phases.

Research Areas
The effect of high pressure in Fe-based superconductors and other unconventional superconductors, interfacial superconductivity, quasi-1D superconductivity in carbon nanotubes and ultrathin nanowire arrays, exotic magnetic-field-induced superconducting phases: the Fulde-Ferrell-Larkin-Ovchinnikov state, coupling of the order parameters in artificial multiferroics, materials with strong electronic correlations, quantum magnetism, skyrmion phases
 
Representative Publications
  •  “High-pressure evolution of the specific heat of the Ba(Fe1−xCox)2As2 iron pnictide superconductor”, Y. Zheng, Y. Wang, F. Hardy, T. Wolf, C. Meingast, and R. Lortz, Physical Review B 89, 054514 (2014).
     
  • “Thermodynamic observation of a first-order vortex melting transition in Ba1-xKxFe2As2”, Huen Kit Mak,  P. Burger, T. Wolf, C. Meingast, and R. Lortz, Physical Review B 87, 214523 (2013).
     
  • “Giant enhancement of the upper critical field and superconducting fluctuations up to 4 K above the bulk Tc in arrays of ultra-thin Pb nanowires”, Mingquan He, Chi Ho Wong, Pok Lam Tse, Yuan Zheng, Haijing Zhang, Frank L. Y. Lam, Ping Sheng, Xijun Hu and Rolf Lortz, ACS Nano 7, 4187 (2013).
     
  • “Thermodynamic Investigation of the Precursor Region in the Cubic Helimagnet FeGe”, L. Cevey, M. Baenitz, M. Schmidt, H. Wilhelm, and R. Lortz, Physica Status Solidi 250, 650 (2013).
     
  • “Thermodynamic evidence for pressure-induced bulk superconductivity and a strong interplay of structural, magnetic and superconducting degrees of freedom in the Fe-As pnictide superconductor CaFe2As2“, Y. Zheng, Y. Wang, B. Lv, C. W. Chu, and R. Lortz, New Journal of Physics 14, 053034 (2012).
     
  • “Superconducting transitions of intrinsic arrays of weakly coupled one-dimensional superconducting chains: the case of the extreme quasi-1D superconductor Tl2Mo6Se6”, B. Bergk, A. Petrovic, Z. Wang, Y. Wang, D. Salloum, P. Gougeon, M. Potel, and R. Lortz, New Journal of Physics 13, 103018 (2011).
     
  • “Observation of the Meissner state in superconducting arrays of 4-Angstrom carbon nanotubes by means of magnetic torque and bulk magnetic measurement”, Chao Ieong, Zhe Wang, Wu Shi, Yuxing Wang, Ning Wang, Zikang Tang, Ping Sheng and Rolf Lortz, Physical Review B 83, 184512 (2011).
     
  • “Magnetic Torque Evidence for the Fulde-Ferrell-Larkin-Ovchinnikov State in In-Plane Magnetic Fields in the Organic Superconductor k-(BEDT-TTF)2Cu(NCS)2”, B. Bergk, A. Demuer, I. Sheikin, Y. Wang, J. Wosnitza, Y. Nakazawa, and R. Lortz, Physical Review B 83, 064506 (2011).
     
  • “Second superconducting energy gap of Nb3Sn observed by breakjunction point-contact spectroscopy”, M. Marz, G. Goll, W. Goldacker and R. Lortz, Physical Review B 82, 024507 (2010).
     
  • “Superconducting characteristics of 4 Ǻ carbon nanotube--zeolite composite”, Rolf Lortz, Qiucen Zhang, Wu Shi, Justin Ye, Chunyin Qiu, Zhe Wang, Hongtao He, Ping Sheng, Tiezheng Qian, Zikang Tang, Ning Wang, Xixiang Zhang, Jiannong Wang, C. T. Chan, PNAS 106, 7299 (2009).
 Full Publication List [HKUST Scholarly Publications]
DEPARTMENT OF PHYSICS