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Short biography

Ching-Hao Chang obtained his PhD (2012) in Physics at University of National Tsing Hua University (NTHU) in Taiwan. He then worked in NTHU and Academia Sinica in Taiwan as a Postdoc. During his PhD and Postdoc in Taiwan, he was granted by DAAD in Germany and Ministry of Science and Technology (MST) in Taiwan as a visiting scientist in Germany. He has been visited Helmholtz Zentrum Dresden Ressdendorf (2011) and IFW Dresden (2013-2014). In 2015, he moved to the Institute of Theoretical Solid State Physics within the IFW Dresden.

His main research interests include magnetotransport in nanoarchitectures, perpendicular magnetic anisotropy and magnetic-coupling mechanism in heterostructure, and topological materials.

Research experiences

Postdoctoral research at Leibniz Institute for Solid State and Materials Research, Germany

1) Demonstrate that a giant anisotropic magnetoresistance up to 80% can be induced by the curved geometry of nanostructures.

2) Demonstrate that a ballistic channel for conducting electron can occur at the curved surface in nanostructures.

3) Provide a first explaintation of the non-saturating magnetoresistance of suspended carbon nanotubes, which has been measured for twenty years.

Postdoctoral research at Research Center for Applied Sciences, Academia Sinica, Taiwan

1) Propose a new mechanism to boost the magnitude of spin orbital coupling in a noble metal up to two orders.

2) Demonstrate that the perpendicular magnetic anisotropy (PMA) in a ferromagnetic thin film is directly related to its quantum well resonance.

Publications

(* corresponding author)

2. C. H. Chang*, K. P. Dou, G. Y. Guo, and C. C. Kaun*, "Quantum-well-induced engineering of magnetocrystalline anisotropy in ferromagnetic films", NPG Asia Mater. 9, e424 (2017).

3. C. H. Chang* and C. Ortix*, “Theoretical prediction of a giant anisotropic magnetoresistance in carbon nanoscrolls”, Nano Lett. 17, 3076 (2017).

 

2016

4.  C. H. Chang, T. R. Chang, and H. T. Jeng*, “Newtype Large Rashba-Splitting in Quantum-Well-State induced by Spin-Chirality in Metal/Topological-Insulator”, NPG Asia Mater. 8, e332 (2016).

5.  C. H. Chang* and C. Ortix*, "Ballistic anisotropic magnetoresistance in core-shell nanowires and rolled-up nanotubes", International Journal of Morden Physics B, 1630016 (2016). Invited review article.

6. A. Huang, C. H. Chang* and H. T. Jeng*, “Magnetic Phase Transition of La1-xSrxMnO3 Induced by Charge Transfer and InterdiffusionIEEE Magn. Lett. 8, 1402905 (2016).

 

2015

7.  C. H. Chang*, K. P. Dou, Y. C. Chen, T. M. Hong, and C. C. Kaun*, "Engineering the interlayer exchange coupling in magnetic trilayers" Sci. Rep. 5, 16844 (2015).

8. S. T. Tsai, C. D. Chang, C. H. Chang, M. X. Tsai, N. J. Hsu, and T. M. Hong*, “Power-law ansatz in complex systems: Excessive loss of information”, Phys. Rev. E 92, 062925 (2015).

 

2014

9.  C. H. Chang*, J. van den Brink, and C. Ortix, "Strongly Anisotropic Ballistic Magnetoresistance in Compact 3D Semiconducting Nanoarchitectures", Phys. Rev. Lett. 113, 227205 (2014). PRL Editor suggestion.

 

Selected publications before 2013

10.  C. H. Chang* and T. M. Hong*, “Switch off the magnetic exchange coupling by quantum resonances”, Phys. Rev. B 85, 214415 (2012).

11.  C. H. Chang and T. M. Hong*, “Interlayer exchange coupling beyond the proximity force approximation”, Phys. Rev. B 82, 094415 (2010). Selected for the Virtual Journal of Nanoscale Science & Technology 22 (12) (2010).

12.  C. H. Chang, S. M. Wang, and T. M. Hong*, “Origin of branch points in the spectrum of PT-symmetric periodic potentials”, Phys. Rev. A 80, 042105 (2009).

13.  C. H. Chang and T. M. Hong*, “Interlayer coupling enhanced by the interface roughness”, Phys. Rev. B 79, 054415 (2009).

14.  C. H. Chang and T. M. Hong*, “Spin-glass-like behavior caused by Mn-riched Mn(Ga)As nanoclusters in GaAs”, Appl. Phys. Lett. 93, 212106 (2008). Selected for the Virtual Journal of Nanoscale Science & Technology 18 (23) (2008).