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Dr. Yang Liu 刘阳

Assistant Professor

 

Contact Info

Office：Rm 544, 209 Chengfu Road, Haidian District, Beijing, 100871

Tel：17812704898

Email：liuyang02@pku.edu.cn

Personal Homepage：This person is very lazy. 

Resume

 

Education

Degree

Year

Major     

Institution

Ph.D.

2008-2014

Electric Engineering

Princeton University

M.S.

2006-2008

Electronics Engineering

Tsinghua University

B.S.

2002-2006

Electronics Engineering

Tsinghua University

 

Professional Appointments

Year

Position

Institution

2015-2018

Postdoctoral Fellow

Stanford University

2014-2015

Postdoctoral Fellow

Princeton University

 

Research Interests

Ultra-clean two-dimensional (2D) carrier systems in Modulation-doped GaAs/AlGaAs hetero-structures provide a nearly ideal testing ground for exploring quantum transport and other interaction-induced physics phenomena. This is indeed the cleanest system yet available where the electrons can travel coherently for as long as ~10 μm. At low temperatures and in the presence of a strong magnetic field, these systems exhibit fascinating, often unexpected, many-body states arising from the strong electron-electron interaction. Examples include the fractional quantum Hall liquid, the Wigner solid, and the newly discovered striped (nematic) and bubble phases in the higher Landau levels.

The rapid improvement of quantum computing technique and fast scaling of qubits put great demands on cryogenic electronic circuits operating at millikelvin temperatures. The high electron mobility transistors (HEMTs) based on high quality modulation-doped 2DES/2DHS, are the best candidates. They can be integrated with quantum devices such as qubits, SQUIDs, single-electron transistors, etc., work natively at T ≤ 4 K, have high cut-off frequency, and dissipate only a few μW of power. Moreover, the study of high mobility 2D systems reveals a rich family of quantum phenomenon and transitions such as quantum Hall effect, Wigner crystal, etc., which can be applied in developing new HEMTs.

Read the more detailed research plan.

 

Honors and Awards

2015 GLAM Postdoctoral Fellowship, Stanford University

2015 Finalist of Blavatnik Regional Awards

2014 Princeton EE Outstanding Dissertation Awards

2013 Chinese Government Award for Outstanding Self-Financed Students Abroad

2012 Princeton University Charlotte Elizabeth Procter Honorific Fellowship

 

Selected Publications:

  1. Yang Liu, Dominik K. Rastawicki, Warren Mar, Anna Miglio, Yan Sun, Alex W. Contryman, Lianhua He, Fang Liu, Aihui Zhou, Sorin Melinte, Jean-Christophe Charlier, Gian-Marco Rignanese, and Hari C. Manoharan,“Short-Range Isotopic Variation and Long-Range Hidden Charge Fluctuations Revealed through a Single Quantum Vibron”, manuscript in prepare.
  2. Yang Liu, M. A. Mueed, Md. Shafayat Hossain, S. Hasdermir, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and M. Shayegan, “Morphing of 2D Hole Systems at ν=3/2 in Parallel Magnetic Fields: Compressible, Stripe, and Fractional Quantum Hall Phases”,Phys. Rev. B 94, 155312 (2016).
  3. Yang Liu, S. Hasdemir, L.N. Pfeifer, K.W. West, and K.W. Baldwin, M. Shayegan, “Observation of An Anisotropic Wigner Crystal”, Phys. Rev. Lett. 117, 106802 (2016).
  4. H. Deng, Yang Liu, I Jo, L.N. Pfeifer, K.W. West, K.W. Baldwin, and M. Shayegan, “Composite Fermions Waltz to the Tune of a Wigner Crystal”, Phys. Rev. Lett. 117, 096601 (2016).
  5. Yang Liu, S. Hasdemir, J. Shabani, M. Shayegan, L.N. Pfeifer, K.W. West, and K.W. Baldwin, “Multicomponent fractional quantum Hall states with subband and spin degrees of freedom”, Phys. Rev. B 92, 201101(R) (2015).
  6. Yang Liu,S. Hasdemir, Dobromir Kamburov, A.L. Graninger, M. Shayegan, L.N. Pfeiffer, K.W. West, K.W. Baldwin, and R. Winkler, “Even-denominator Fractional Quantum Hall State at a Landau Level Crossing”, Phys. Rev. B89, 165313 (2014).
  7. D. Kamburov, Yang Liu, M. A. Mueed, M. Shayegan, L. N. Pfeiffer, K. W. West, and K. W. Baldwin, “What Determines the Fermi Wave Vector of Composite Fermions?” Phys. Rev. Lett. 113, 196801 (2014).
  8. Yang Liu, D. Kamburov, S. Hasdemir, M. Shayegan, L.N. Pfeifer, K.W. West, K.W. Baldwin, “Fractional Quantum Hall Effect and Wigner Crystal of Two-Flux Composite Fermions”, Phys. Rev. Lett. 113, 246803 (2014).
  9. J. Shabani, Yang Liu, M. Shayegan, L. N. Pfeiffer, K. W. West, and K. W. Baldwin, “Phase diagrams for the stability of the ν=1/2 fractional quantum Hall effect in electron systems confined to symmetric, wide GaAs quantum wells”, Phys. Rev. B88, 245413 (2013).
  10. Yang Liu, J. Shabani, D. Kamburov, M. Shayegan, L. N. Pfeiffer, K. W. West, and K. W. Baldwin, “Evolution of the 7/2 Fractional Quantum Hall State in Two-Subband Systems”, Phys. Rev. Lett. 107, 266802 (2011).
  11. Yang Liu, J. Shabani, and M. Shayegan, “Stability of the q/3 Fractional Quantum Hall States”, Phys. Rev. B84, 195303 (2011).
  12. Yang Liu, L. Wang, C. Tian, M. Zhang, and Y. Liao, “Analysis and Optimization of the PGC Method in All Digital Demodulation Systems”, Journal of Lightwave Technology 26, pp. 3225-3233 (2008).

 

Opening Positions

 Now hiring. 1-2 Ph.D candidates for 2018-2019, one postdoc position and one research staff position open. Please contact me at liuyang02@pku.edu.cn if you are interested in exploring the physics at low temperature and high magnetic field experimentally.

 

See the link for more information