Sankar Das Sarma

About

Professor Sankar Das Sarma is a Distinguished University Professor in the Department of Physics at the University of Maryland, College Park. His research focuses on the field of physics, and he is a member of the Das Sarma Group. His contact information includes a phone number, fax, and email address, indicating his active engagement in academic and research activities within the university. The provided information emphasizes his role and affiliation but does not detail specific research areas, background, or key contributions.

Research topics

• Condensed matter physics
• Particle physics
• Physics
• Geometry
• Quantum mechanics

Selected publications

• Möbius Insulator and Higher-Order Topology in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>MnBi</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mi>n</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Te</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mi>n</mml:mi><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

  Physical Review Letters · 2020 · 202 citations

  Senior authorCorresponding

  We propose MnBi_{2n}Te_{3n+1} as a magnetically tunable platform for realizing various symmetry-protected higher-order topology. Its canted antiferromagnetic phase can host exotic topological surface states with a Möbius twist that are protected by nonsymmorphic symmetry. Moreover, opposite surfaces hosting Möbius fermions are connected by one-dimensional chiral hinge modes, which offers the first material candidate of a higher-order topological Möbius insulator. We uncover a general mechanism t…

  DOI

• Intravalley spin-polarized superconductivity in rhombohedral tetralayer graphene

  Physical review. B./Physical review. B · 2025-05-19 · 27 citations

  articleSenior author

  We study the intravalley spin-polarized superconductivity in rhombohedral tetralayer graphene, which has been discovered experimentally in Han et al. [arXiv:2408.15233]. We construct a minimal model for the intravalley spin-polarized superconductivity, assuming a simplified anisotropic interaction that depends only on the angle between the incoming and outgoing momenta. Despite the absence of Fermi surface nesting, we show that superconductivity can emerge near the Van Hove singularity with the…

  PublisherDOI

• Superconductivity in twisted transition metal dichalcogenide homobilayers

  Physical review. B./Physical review. B · 2025-02-06 · 24 citations

  preprintOpen accessSenior author

  Recently, robust superconductivity has been independently reported in twisted ${\mathrm{WSe}}_{2}$ bilayers by two separate groups [Y. Xia et al., arXiv:2405.14784; Y. Guo et al., Nature (London) 637, 839 (2025)]. In light of this, we explore the possibility of a universal superconducting pairing mechanism in twisted ${\mathrm{WSe}}_{2}$ bilayers. Using a continuum band structure and a phenomenological boson-mediated effective electron-electron attraction, we find that intervalley intralayer pai…

  PublisherOA PDFDOI

• Rabi and Ramsey oscillations of a Majorana qubit in a quantum dot-superconductor array

  Physical review. B./Physical review. B · 2025-02-12 · 14 citations

  articleOpen access

  The authors address here the latest experimental platform for the topological Majorana qubit -- the artificial Kitaev chain -- and propose a new experimental direction to establish the topological qubit by evaluating its realistic qubit performance in Rabi and Ramsey oscillation experiments, including dephasing time, quality factor, leakage, and other key metrics. This work demonstrates that the qubit performance in the current experimental platform exhibits significantly enhanced coherence comp…

  PublisherOA PDFDOI

• Fractional quantum anomalous Hall effect in rhombohedral multilayer graphene with a strong displacement field

  Physical review. B./Physical review. B · 2025-02-13 · 10 citations

  preprintOpen access

  We investigate the fractional quantum anomalous Hall (FQAH) effect in rhombohedral multilayer graphene (RnG) in the presence of a strong applied displacement field. We first introduce the interacting model of RnG, which includes the noninteracting continuum model and the many-body Coulomb interaction. We then discuss the integer quantum anomalous Hall (IQAH) effect in RnG and the role of the Hartree-Fock approach in understanding its appearance. Next, we explore the FQAH effect in RnG for $n=3\e…

  PublisherOA PDFDOI

Recent grants

• Spin Electronics

  NSF · $300k · 2002–2007

Frequent coauthors

• Jay D. Sau

  258 shared

• E. H. Hwang

  Sungkyunkwan University

  216 shared

• Tudor D. Stanescu

  110 shared

• Fengcheng Wu

  110 shared

• DinhDuy Vu

  Joint Quantum Institute

  102 shared

• Haining Pan

  Cornell University

  94 shared

• Robert E. Throckmorton

  Joint Quantum Institute

  94 shared

• Xuedong Hu

  84 shared

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