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== Research ==
== Research ==
As a Ph.D. student, Hwang was part of a team that discovered that spin-polarized tunnel currents in polycrystalline manganates produce very high [[magnetoresistance]]s.<ref>{{cite journal | author = H. Y. Hwang, S-W. Cheong, NP Ong, B. Batlogg | title = Spin-Polarized Intergrain Tunneling in La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub> | journal = Physical Review Letters | volume = 77 | issue = 10 | date = 2 September 1996 | doi = 10.1103/PhysRevLett.77.2041 | pages = 2041–2044 | url = https://link.aps.org/doi/10.1103/PhysRevLett.77.2041 }}</ref> During his time at Bell Laboratories, his team developed methods for studying the "nature and length scales of charge screening in [[complex oxide]]s" and how "short-length-scale electronic response can be probed and incorporated in thin-film oxide [[heterostructure]]s"<ref>{{cite journal | author = A. Ohtomo, DA Muller, JL Grazul, HY Hwang | title = Artificial charge-modulation in atomic-scale perovskite titanate superlattices | journal = Nature | volume = 419 | issue = 6905 | date = 26 September 2002 | ISSN = 0028-0836 | doi = 10.1038/nature00977 | pages = 378–380 | url = https://www.nature.com/articles/nature00977}}</ref> and also pointed out a [[Two-dimensional nuclear magnetic resonance spectroscopy | two-dimensional]] metallic state at the interface between the [[Electronic band structure|band]] [[Mott insulator|insulator]]s [[Lanthanum aluminate|LaAlO<sub>3</sub>]] and [[Strontium titanate|SrTiO<sub>3</sub>]].<ref>{{cite journal | author = A. Ohtomo, HY Hwang | title = A high-mobility electron gas at the LaAlO<sub>3</sub> / SrTiO<sub>3</sub> heterointerface | journal = Nature | volume = 427 | issue = 6973 | date = 29 January 2004 | ISSN = 0028-0836 | doi = 10.1038/nature02308 | pages = 423–426 | url = https://www.nature.com/articles/nature02308 }}</ref> Subsequently, his team did research on phenomena which emerge at interfaces between oxide materials.<ref>{{cite journal| author = H. Y. Hwang, Y. Iwasa, M. Kawasaki, B. Keimer, N. Nagaosa | title = Emergent phenomena at oxide interfaces | journal = Nature Materials | volume = 11 | issue = 2 | date = 24 January 2012 | ISSN = 1476-1122 | doi = 10.1038/nmat3223 | pages = 103-113 | url = https://www.nature.com/articles/nmat3223 }}</ref>
As a Ph.D. student, Hwang was part of a team that discovered that spin-polarized tunnel currents in polycrystalline manganates produce very high [[magnetoresistance]]s.<ref>{{cite journal | author = H. Y. Hwang, S-W. Cheong, NP Ong, B. Batlogg | title = Spin-Polarized Intergrain Tunneling in La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub> | journal = Physical Review Letters | volume = 77 | issue = 10 | date = 2 September 1996 | doi = 10.1103/PhysRevLett.77.2041 | pages = 2041–2044 | url = https://link.aps.org/doi/10.1103/PhysRevLett.77.2041 }}</ref> During his time at Bell Laboratories, his team developed methods for studying the "nature and length scales of charge screening in [[complex oxide]]s" and how "short-length-scale electronic response can be probed and incorporated in thin-film oxide [[heterostructure]]s"<ref>{{cite journal | author = A. Ohtomo, DA Muller, JL Grazul, HY Hwang | title = Artificial charge-modulation in atomic-scale perovskite titanate superlattices | journal = Nature | volume = 419 | issue = 6905 | date = 26 September 2002 | ISSN = 0028-0836 | doi = 10.1038/nature00977 | pages = 378–380 | url = https://www.nature.com/articles/nature00977}}</ref> and also pointed out a [[Two-dimensional nuclear magnetic resonance spectroscopy | two-dimensional]] metallic state at the interface between the [[Electronic band structure|band]] [[Mott insulator|insulator]]s [[Lanthanum aluminate|LaAlO<sub>3</sub>]] and [[Strontium titanate|SrTiO<sub>3</sub>]].<ref>{{cite journal | author = A. Ohtomo, HY Hwang | title = A high-mobility electron gas at the LaAlO<sub>3</sub> / SrTiO<sub>3</sub> heterointerface | journal = Nature | volume = 427 | issue = 6973 | date = 29 January 2004 | ISSN = 0028-0836 | doi = 10.1038/nature02308 | pages = 423–426 | url = https://www.nature.com/articles/nature02308 }}</ref> Subsequently, his team did research on phenomena which emerge at interfaces between oxide materials.<ref>{{cite journal| author = H. Y. Hwang, Y. Iwasa, M. Kawasaki, B. Keimer, N. Nagaosa | title = Emergent phenomena at oxide interfaces | journal = Nature Materials | volume = 11 | issue = 2 | date = 24 January 2012 | ISSN = 1476-1122 | doi = 10.1038/nmat3223 | pages = 103-113 | url = https://www.nature.com/articles/nmat3223 }}</ref>

An article that Hwang co-authored with [[Jan Hendrik Schön]] and two other physicists was published in April 2001 in the journal ''Science'', but was retracted in November 2002.<ref name="Schon2001">{{cite journal|last1=Schon|first1=J. H. ''et al.''|title=Josephson Junctions with Tunable Weak Links|journal=Science|volume=292|issue=5515|year=2001|pages=252–254|issn=00368075|doi=10.1126/science.1058812}}</ref>


==Awards and honors==
==Awards and honors==

Revision as of 21:24, 12 February 2020

Harold Yoonsung Hwang (born 4 August 1970 in Pasadena, California) is an American physicist, specializing in materials physics, condensed matter physics, nanoscience, and quantum engineering.[1][2]

Education and career

Harold Hwang graduated in 1993 from MIT with B.S. in physics, as well as B.S. and M.S. in electrical engineering. He received in 1997 his Ph.D. from Princeton University with thesis advisor Nai Phuan Ong. At Bell Laboratories in New Jersey, Hwang was from 1994 to 1996 a research assistant and from 1996 to 2003 a member of the technical staff. At the Department of Advanced Materials Science and the Department of Applied Physics at University of Tokyo in Kashiwa, Japan, he was from 2003 to 2008 an associate professor and from 2009 a full professor. From 2006 to 2007 he was also a visiting associate professor at the Institute for Chemical Research at Kyoto University. Since 2010, he has been a professor of physics at the Department of Applied Physics at Stanford University and team leader of the Correlated Electron Research Group at the RIKEN Advanced Science Institute in Wakō, Saitama, Japan.[3]

Research

As a Ph.D. student, Hwang was part of a team that discovered that spin-polarized tunnel currents in polycrystalline manganates produce very high magnetoresistances.[4] During his time at Bell Laboratories, his team developed methods for studying the "nature and length scales of charge screening in complex oxides" and how "short-length-scale electronic response can be probed and incorporated in thin-film oxide heterostructures"[5] and also pointed out a two-dimensional metallic state at the interface between the band insulators LaAlO3 and SrTiO3.[6] Subsequently, his team did research on phenomena which emerge at interfaces between oxide materials.[7]

An article that Hwang co-authored with Jan Hendrik Schön and two other physicists was published in April 2001 in the journal Science, but was retracted in November 2002.[8]

Awards and honors

In 2005 he received the Materials Research Society Outstanding Young Investigator Award. In 2008 he received the IBM Japan Science Prize[9] and in 2013 the Ho-Am Prize in Science in Science.[10][11] On 18th June 2014 he received, together with Jochen Mannhart and Jean-Marc Triscone, the Europhysics Prize of the Condensed Matter Division of the European Physical Society.[12] In 2011 he was elected a fellow of American Physical Society.[13]

References

  1. ^ "Harold Y. Hwang". Department of Applied Physics, Stanford University. (with list of selected publications)
  2. ^ "Harold Y. Hwang". SIMES, Stanford Institute for Materials & Energy.
  3. ^ "Harold Y. Hwang, 界面 の 構造 と 制 御 - 研究者 (Interface structure and control-Researcher)". jst.go.jp.
  4. ^ H. Y. Hwang, S-W. Cheong, NP Ong, B. Batlogg (2 September 1996). "Spin-Polarized Intergrain Tunneling in La2/3Sr1/3MnO3". Physical Review Letters. 77 (10): 2041–2044. doi:10.1103/PhysRevLett.77.2041.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  5. ^ A. Ohtomo, DA Muller, JL Grazul, HY Hwang (26 September 2002). "Artificial charge-modulation in atomic-scale perovskite titanate superlattices". Nature. 419 (6905): 378–380. doi:10.1038/nature00977. ISSN 0028-0836.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  6. ^ A. Ohtomo, HY Hwang (29 January 2004). "A high-mobility electron gas at the LaAlO3 / SrTiO3 heterointerface". Nature. 427 (6973): 423–426. doi:10.1038/nature02308. ISSN 0028-0836.
  7. ^ H. Y. Hwang, Y. Iwasa, M. Kawasaki, B. Keimer, N. Nagaosa (24 January 2012). "Emergent phenomena at oxide interfaces". Nature Materials. 11 (2): 103–113. doi:10.1038/nmat3223. ISSN 1476-1122.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  8. ^ Schon, J. H.; et al. (2001). "Josephson Junctions with Tunable Weak Links". Science. 292 (5515): 252–254. doi:10.1126/science.1058812. ISSN 0036-8075. {{cite journal}}: Explicit use of et al. in: |first1= (help)
  9. ^ "Special Colloquium: Harold Y. Hwang". Department of Physics, Zhejiang University. 15 November 2018.
  10. ^ "Harold Hwang Wins Top Korean Award". SLAC National Accelerator Laboratory. 16 April 2013.
  11. ^ Samsung Announces 2013 Ho-Am Prize Winners | Samsung Official Blog: Samsung Village, 2016-10-12
  12. ^ "Harold Hwang wins prestigious European physics prize". The Dish, Stanford News. 18 June 2014.
  13. ^ "American Physical Society Names Prof. Harold Hwang a Fellow". SLAC National Accelerator Laboratory. 29 November 2011.
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