Van de Walle
Computational Materials Group
vandewalle@mrl.ucsb.edu | (805) 893-7144

Materials Department, University of California, Santa Barbara, CA 93106-5050

 

Recent News

Invited Talks

Prof. Chris Van de Walle was elected to the National Academy for Engineering (NAE) for his "contributions to the theory of semiconductor interfaces and its impact on optoelectronic devices."

From the NAE website: "Election to the National Academy of Engineering is among the highest professional distinctions accorded to an engineer. Academy membership honors those who have made outstanding contributions to "engineering research, practice, or education, including, where appropriate, significant contributions to the engineering literature" and to "the pioneering of new and developing fields of technology, making major advancements in traditional fields of engineering, or developing/implementing innovative approaches to engineering education."

Prof. Van de Walle will be formally inducted during a ceremony at the NAE's Annual Meeting in Washington, D.C. on October 9, 2016.


Recent News

November 2016

Dr. Darshana Wickramaratne has been awarded the 2016 Outstanding Research Achievement Award by the Solid State Lighting and Energy Efficiency Center (SSLEEC) "For outstanding research on nonradiative recombination mechanisms".

April 2016

Our study on the impact of nonradiative recombination on the efficiency of LEDs was published as a Featured Article in Applied Physics Letters [APL 108, 141101 (2016)] , with an accompanying figure on the cover of the journal. See also http://www.news.ucsb.edu/2016/016653/becoming-crystal-clear

March 2016

Prof. Chris Van de Walle elected to the National Academy for Engineering (NAE).

NAE announcement

March 2015

Professor Van de Walle has received the 2015 TMS FMD John Bardeen Award, “For seminal contributions to the theory and understanding of semiconductor band offsets, doping, defects, and loss mechanisms, and the role of hydrogen in electronic materials.”

John Bardeen Award

June 2014

Luke speaks at UCSB's Technology Management Program's commencement ceremony

May 2014

Cyrus Dreyer's work on nitride surfaces has been published in Physical Review B (R).

"Aiding nitride growth with accurate surface energies", Compound Semiconductor, May 19th

March 2014

Cyrus Dreyer joined grad students, administrators and deans from all 10 UC campuses to travel to Sacramento with a strong message: UC graduate students are critical to the research that improves quality of life and brings millions of dollars of investment to California.

"Two UCSB PhD students shed light on Research during Graduate Research Advocacy Day", Noozhawk, March 28th

March 2014

Abhishek K. Singh, former postdoc in the Van de Walle group and now Assistant Professor at the Indian Institute of Science, Bangalore, received the 2014 Materials Research Society of India (MRSI) medal. MRSI Medals are awarded in recognition of excellence in a particular field of expertise within the domain of materials and processes.

November 2013

Professor Van de Walle receives Herbert Kroemer Endowed Chair

Chris Van de Walle is the inaugural recipient of the Herbert Kroemer Endowed Chair in Materials Science. Professor Van de Walle's appointment recognizes his outstanding achievements in computational materials science, where he has employed first-principles techniques to model the structure and behavior of wide-band-gap semiconductors, oxides, and hydrogen storage materials.

November 2013

 

Cyrus Dreyer has been awarded the 2013 outstanding graduate student research achievement award by the Solid State Lighting and Energy Center (SSLEC)

"For outstanding research on fundamental properties of nitride bulk and surfaces"

October 2013

Professor Van de Walle receives AVS Medard Welch Award

Chris G. Van de Walle, Professor of Materials, is the recipient of the 2013 AVS Medard W. Welch Award, the premier honor given by AVS, the Science and Technology society. The citation reads "For seminal contributions to the theory of heterojunctions and its applications to semiconductor technology, and for elucidating the role of hydrogen in electronic materials." Professor Van de Walle received the award at the AVS International Symposium and Exhibition, Long Beach, CA, October 27-November 1, 2013.

July 2013

 

Hartwin Peelaers' work on MoS2 has been published in Physical Review B.

"A Humble Substance with Big Possibilities for Electronics", National Institute for Computational Sciences, July 14th, 2013

July 2013

 

Audrius Alkauskas has given a tutorial on "Recent advances in the theoretical description of defects: atomic and electronic structure, properties, and processes" at the International Conference on Defects in Semiconductors in Bologna, Italy, from July 21st to 26th.

March 2013

 

John Lyons has received the 2013 Ken Hass Outstanding Student Paper Award from the American Physical Society

November 2012

 

Anderson Janotti: 2012 Outstanding Researcher Award from the Solid State Lighting and Energy Center (SSLEC)

July 2012

 

Lars Ismer's work on hydrogen release from storage materials has been published in the Journal of Physical Chemistry.

"Calculations reveal fine line for hydrogen release from storage materials", Eurekalert.org, July 17th 2012

April 2012

 

Justin Weber, PhD student in the Van de Walle group 2006-2011, has received the 2012 Nicholas Metropolis Award for Outstanding Doctoral Thesis Work in Computational Physics. .

 

March 2012

 

"Effective Defects for Quantum Computers", Livescience.com, March 9th, 2012 .

 

January 2012

 

Hartwin Peelaers' work on the "fundamental transparency limits in transparent conducting oxides" has been published in Applied Physics Letters, and been featured in the press.

 

November 2011

 

Qimin Yan has been awarded the 2011 outstanding graduate student research achievement award by the Solid State Lighting and Energy Center (SSLEC)

"For supporting the development of high-efficiency light emitters through first-principles calculations and device simulations of strain effects, optical polarization, and doping."

 

 

June 2011

 

Emmanouil Kioupakis has joined the faculty of the Materials Science and Engineering Department at the University of Michigan, as an assistant professor:

 

 

July 2011

 

"Effective Defects", Texas Advanced Computing Center, July 20th, 2011

 

 

June 2011

 

Manos Kioupakis' work on indirect Auger recombination and the efficiency droop of nitride light emitters has been published in Applied Physics Letters and has been featured in the technical and general press

 

 

March 2011

 

Four members of the Van de Walle group will be presenting invited talks at the upcoming March Meeting of the American Physical Society: Anderson Janotti, Lars Ismer, Joel Varley, and Jack Lyons

In addition, Poul Moses will present an invited talk on research performed while he was a member of the group.

 

 

March 2011 photophoto

 

Joel Varley and Jack Lyons have been awarded the APS Division of Materials Physics Ovshinsky Student Travel Award. This will be presented at the DCMP/DMP/DCOMP/DCP New Fellows and Award Winners Reception, to be held at the 2011 March Meeting in Dallas, Texas.

January 2011: Feature article and cover on Electronic Structure Methods for Defects

 

"Advances in electronic structure methods for defects and impurities in solids", Phys. Status Solidi B, Jan 1 (2011)

 

January 2011

 

Chris Van de Walle has been named a Fellow of the American Association for Advancement of Science (AAAS) Chris “ for pioneering research on the theory of semiconductor interfaces and defects in solids, and for leadership in computational physics and materials science."

 

November 2010

 

Emmanouil (Manos) Kioupakis has received the SSLEC Outstanding Researcher Award for his work on Auger recombination and free-carrier absorption in light emitters.

 

October 2010: Carbon in GaN

 

"Yellow Luminescence In GaN Is Down To Carbon", Compound Semiconductor, Oct 14 (2010)

Among the most downloaded Applied Physics Letters papers (October, November and December 2010).

 

August 2010: Free carrier absorption

 

"Green Laser Absorption Loss Culprit ID'd", Photonics.com, Aug 6 (2010)

"Ionization Density; the Answer to Absorption Loss in Green Lasers?", Compound Semiconductor, Aug 02 (2010)

 

July 2010 Abhishek Singh

 

Justin Weber has received the “Young Author Best Paper Award” from the International Conference on the Physics of Semiconductors (Seoul, July 25-30, 2010), for his paper on “Quantum computing with defects”. 

 

May 2010: Quantum computing with defects

 

"Scientists look beyond diamond for quantum computing", ScienceDaily.com, May 2 (2010)

"Quantum Bits: Better than excellent", David DiVincenzo, Nature Materials 9, 468 (2010)

"Defect as Qubit Paradigm Developed in New Materials Systems", Alison Hatt, MRS Bulletin 35, 564 (2010)

 

April 2010: Feature article and cover on Conductivity of InN

 

"Controlling the conductivity of InN", Stefan Hildebrandt, Materials Views, Apr 16 (2010)

Cover of Physica Status Solidi A, Phys. Stat. Sol. A, Mar 4 (2010)

 

April 2010

 

Chris Van de Walle has been elected a Fellow of the Materials Research Society “for pioneering research on the theory of defects in solids, semiconductor interfaces, and leadership in computational materials science."

 

January 2010: Nitrogen in ZnO

 

"Nitrogen cannot dope ZnO p-type, say UCSB researchers", Compound Semiconductor, Jan 2010

#1 Most downloaded Applied Physics Letters paper in January, February and March 2010

November 2009 photo

 

P. Rinke has received the SSLEC Outstanding Researcher Award for his work on Auger recombination in nitrides.

 

October 2009

 

Poul Moses has received the Charles Kittel award for Best Theoretical Research at the 2009 California APS meeting for his work on band-gap bowing band offsets, and electron affinities for AlN, GaN, InN and InGaN.

 

September 2009

 

Chris Van de Walle has been elected a Fellow of the AVS “for pioneering research on the theory of semiconductor interfaces, defects in solids, and computational materials science.”

 

 

December 2006: Hydrogen multicenter bonds

 

"Beyond the Bonds That Bind: UCSB Researchers Discover Hydrogen Can Form Multicenter Bonds", UCSB College of Engineering, Dec 3rd (2006)

"Hydrogen gets promiscuous", Richard Van Noorden, Chemistry World, Dec 4th (2006)

"Hydrogen multicenter bonds", A. Janotti and C. G. Van de Walle, Nature Materials 6 44-47 (2007)

 

 

 

 

 

 

 

Invited Talks

(for Chris Van de Walle's talks, please see his Publication List).

"How acceptor localization limits p-type conductivity in nitride semiconductors," John Lyons, International Conference on Defects in Semiconductors, Bologna, Italy, July 2013

"Electron-phonon interactions in wide band-gap semiconductors: implications for photoelectronic devices and materials characterization", Audrius Alkauskas, European Theoretical Spectroscopy Facility Young Researcher's meeting, Budapest, Hungary, May 2013

"Fundamental limits on transparency: first-principles calculations of absorption", Hartwin Peelaers, APS March Meeting, Baltimore, MD, March 2013

"How localized acceptors limit p-type conductivity in GaN," John Lyons, APS March Meeting, Baltimore, MD, March 2013

"Controlling the two-dimensional electron gas at the interface of complex oxides", Anderson Janotti, Materials Outreach Program, University of California, Santa Barbara, January 2013

"Electron-phonon interactions in solids: concepts, first-principles calculations, and applications to defects", TexasTech University, Audrius Alkauskas, Lubbock, Texas, November 2012

"Bulk and interface properties from first-principles", Anderson Janotti, II Workshop on the Physics of Complex Oxides, Mallorca, Spain, October 2012

"First-principles lineshapes of defect luminescence bands: Nitrogen-vacancy center in diamond", Virginia Commonwealth University, Audrius Alkauskas, Richmond, Virginia, October 2012

"Shallow versus deep nature of Mg impurities in nitride semiconductors," John Lyons, IWN 2012, Sapporo, Japan, October 2012

"Challenges in controlling the conductivity in complex oxides", Anderson Janotti, Gordon Research Conference on Defects in Semiconductors, University of New England, Maine, August 2012

"Nature of Mg impurities in nitride semiconductors," John Lyons, ISSLED 2012, TU-Berlin, Berlin, Germany, July 2012.

"Small polarons in semiconducting oxides", Anderson Janotti, Inaugural International Conference of Young Researchers on Advanced Materials (IUMRS-ICYRAM 2012), Singapore, July 2012.

"Structural and electronic defects in transition-metal oxide semiconductors", Anderson Janotti, 7th International Symposium on Advanced Materials and Nanostructures (ISAMN), Sao Paulo, Brazil, May 2012.

"Doping and defects in wide-band-gap oxide semiconductors", Anderson Janotti, Materials Research Society Fall Meeting, Boston, MA, November, 2011

"First-principles calculations for TiO2", Anderson Janotti, Computational Surface Science Conference 2011, Santa Barbara, CA, August, 2011

"Indirect Auger recombination and optical absorption in optoelectronic materials", Emmanouil Kioupakis, Computational Surface Science 2011, Santa Barbara, CA, August, 2011

"Thermostats and thermal transport in solids", Christian Carbogno, Hands-on Tutorial Workshop 2011 on Ab Initio Molecular Simulations: Toward a First-Principles Understanding of Materials Properties and Functions, Berlin, Germany, July, 2011

"Indirect Auger recombination as the origin of the efficiency droop in nitride LEDs", Emmanouil Kioupakis, SEMICON West, San Francisco, CA, July, 2011

"Controlling the conductivity in InN", Anderson Janotti, E-MRS Spring Meeting, Nice, France, May, 2011

"Advances in electronic structure methods for defects and impurities", John Lyons, MRS Spring Meeting, San Francisco, CA, April, 2011

"Native defects and hydrogen impurities in oxide semiconductors", Anderson Janotti, 7th Petite Workshop on the Defect Chemical Nature of Advanced Materials for Energy, Norway, March , 2011

"Hybrid functional studies of defects and impurities in ZnO", John Lyons, APS March Meeting, Dallas, TX, March, 2011.

"Quantum computing with defects", Joel Varley, APS March Meeting, Dallas, TX, March, 2011.

"Point-defect-mediated dehydrogenation of alane", Lars Ismer, APS March Meeting, Dallas, TX, March 2011.

"Causes of yellow luminescence in GaN", Anderson Janotti, APS March Meeting, Dallas, TX, 2011.

"Doping limitations and opportunities in ZnO", John Lyons, Materials Research Outreach Symposium, University of California, Santa Barbara, February 2011

"Auger recombination and absorption loss processes in nitride light emitters from first principles", Emmanouil Kioupakis,15th International Workshop on Computational Physics and Materials Science: Total Energy and Force Methods, January 13th 2011, International Centre for Theoretical Physics, Trieste, Italy.

"Auger recombination and absorption loss processes in nitride light emitters from first-principles calculations", Emmanouil Kioupakis, Colloquium, January 10th 2011, Materials Department, University of Crete, Greece .

"Electronic structure, point defects and impurities in β-Ga2O", Justin Weber, Focused Workshop on Semiconducting Oxides, Santa Barbara, CA, USA, September 2010

"Doping limitations and opportunities in ZnO", John Lyons, ZnO Workshop, University of California, Riverside, July 7-9th, 2010

"Quantum computing with defects", Justin Weber, International Conference on the Physics of Semiconductors, Seoul, Korea, July 2010

"First-principles calculation of Auger recombination and internal absorption loss in nitride light emitters", Emmanouil Kioupakis, 22nd Annual Workshop on Electronic Structure Methods, June 8th 2010, University of Texas, Austin, TX, USA.

"Auger recombination and internal absorption loss in nitride light emitters from first principles", Emmanouil Kioupakis, Electronic-structure challenges in materials modeling for energy applications, June 3rd 2010, CECAM, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.

"Auger recombination in nitride semiconductors", Emmanouil Kioupakis, APS 2010 March Meeting, March 16th 2010, Portland, OR, USA

"Defects and doping in oxides: What we have learned so far", Workshop on “Bridging the gap between theory and experiment: which theoretical approaches are best suited to solve real problems in nanotechnology and biology?”, Stanford University, CA, Feb 2010

"Oxygen vacancies in oxides", Anderson Janotti, 25th ICDS – International Conference on Defects in Semiconductors, S. Petersburg, Russia, July 2009

"LDA+U and hybrid functionals applied to the study of defects in oxide and nitride semiconductors, Anderson Janotti, Workshop on “Which Electronic Structure Method for the Study of Defects?”, CECAM-HQ-EPFL, Lausanne, Switzerland, June 2009

"Hydrogen multicenter bond in oxide and nitride semiconductors", Anderson Janotti, American Physical Society, March Meeting, Pittsburgh, PA, March 2009

"Controlling conductivity in transparent conductors", Joel Varley, Materials Research Outreach Symposium, University of California, Santa Barbara, February 2009

"Doping and defects in oxide semiconductors", Anderson Janotti, Latin American School on Computational Materials Science, Santiago, Chile

"First-principles studies of novel channel materials for CMOS technology", Justin Weber, Materials Colloqium, University of California, Santa Barbara, CA, USA, October 2008

"Hydrogen as a source of n-type conductivity in ZnO", Anderson Janotti, 5th International Workshop on ZnO and Related Materials, Ann Arbor, MI, September 2008

"Hydrogen-acceptor interations in SnO2", Joel Varley, Materials Research Laboratory Symposium, University of California, Santa Barbara, July 2008

"Dangling bond defects and hydrogen passivation in germanium", Justin Weber, APS March Meeting, New Orleans, LA, USA, March 2008

"Band alignments at oxide semiconductor interfaces", Anderson Janotti, 11th International Conference on the Formation of Semiconductor Interfaces, Manaus, Amazonas, Brazil, August 2007

"On the cause of unintentional n-type conductivity in ZnO", Anderson Janotti, 14th Semiconducting and Insulating Materials Conference SIMC-XIV, University of Arkansas, Fayetteville, AR , June 2007

"Hydrogen Multicenter Bonds in Oxides", Anderson Janotti, Materials Outreach Program Symposium, University of California Santa Barbara, CA, Jan 2007

"New insights into the role of native point defects in ZnO", Anderson Janotti, 3rd International Conference on Materials for Advanced Technologies and 9th Conference on Advanced Materials, Suntec, Singapore, July 2006

"Defect physics in III-V dilute nitride alloys: the important role of hydrogen", Anderson Janotti, Materials Research Society Spring Meeting, San Francisco, CA, April 2004

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