Faculty Details

Areas of Interest

• Condensed Matter Theory
• Strongly Correlated Systems
• Frustrated Magnetism
• Quantum Spin Liquids
• Pseudo-Fermion Functional Renormalization Group and Variational Monte Carlo methods for spin systems

Current Research

Students

Current PhD Students

• PH18D022    AISHWARYA CHAUHAN
• PH19D011    SOURIN CHATTERJEE
• PH20D010    HARI PRASAAD B J
• PH19D033    SUBHOJIT ROY (Co-Guidance)
• PH21D054    AKSHAY KUMAR

Recent Publications

• Dimerization tendencies of the pyrochlore Heisenberg antiferromagnet: A functional renormalization group perspective. M. Hering, V. Noculak, F. Ferrari, Y. Iqbal, and J. Reuther. Physical Review B. 105. 054426.
  DOI: 10.1103/PhysRevB.105.054426. 2022.
• Gutzwiller projected states for the J1 − J2 Heisenberg model on the Kagome lattice: Achievements and pitfalls. Yasir Iqbal, Francesco Ferrari, Aishwarya Chauhan, Alberto Parola, Didier Poilblanc, and Federico Becca. Physical Review B. 104 . 144406 . 2021.
• Pinwheel valence bond crystal ground state of the spin-1/2 Heisenberg antiferromagnet on the shuriken lattice. N. Astrakhantsev, F. Ferrari, N. Niggemann, T. Müller, A. Chauhan, ... and Y. Iqbal. Physical Review B (Letters) [Editors' Suggestion]. 104. L220408.
  DOI: 10.1103/PhysRevB.104.L220408. 2021.
• Magnetic Field Induced Quantum Spin Liquid in the Two Coupled Trillium Lattices of K2Ni2(SO4)3. Ivica Živković, et al., Yasir Iqbal, Johannes Reuther, and Henrik M. Rønnow. Physical Review Letters. 127. 157204. 2021.
• Nature of Unconventional Pairing in the Kagome Superconductors AV3Sb5 (A = K, Rb, Cs). X. Wu, T. Schwemmer, T. Müller, A. Consiglio, G. Sangiovanni, D. Di Sante, Y. Iqbal, W. Hanke, A. P. Schnyder, M. M. Denner, M. H. Fischer, T. Neupert, and R. Thomale. Physical Review Letters. 127 . 177001 . 2021.
• q=0 long-range magnetic order in centennialite CaCu3(OD)6Cl2.0.6D2O: A spin-1/2 perfect kagome antiferromagnet with J1-J2-Jd. K. Iida, H. K. Yoshida, A. Nakao, H. O. Jeschke, Y. Iqbal, K. Nakajima, S. Ohira-Kawamura, K. Munakata, Y. Inamura, N. Murai, M. Ishikado, R. Kumai , T. Okada, M. Oda, K. Kakurai, and M. Matsuda. Physical Review B. 101 . 220408 . 2020.
• Competing orders in a frustrated Heisenberg model on the Fisher lattice. Atanu Maity, Yasir Iqbal, Saptarshi Mandal. Phys. Rev. B. 102 . 224404 . 2020.
• Degenerate manifolds, helimagnets, and multi-Q chiral phases in the classical Heisenberg antiferromagnet on the face-centered-cubic lattice. Péter Balla, Yasir Iqbal, Karlo Penc. Phys. Rev. Research. 2 . 043278 . 2020.
• Evidence for a three-dimensional quantum spin liquid in PbCuTe2O6. S. Chillal, Y. Iqbal, H. O. Jeschke, J. A. Rodriguez-Rivera, R. Bewley, P. Manuel, D. Khalyavin, P. Steffens, R. Thomale, A. T. M. N. Islam, J. Reuther, B. Lake. Nature Communications. 11 . 2348 . 2020.
• Projective symmetry group classifications of quantum spin liquids on the simple cubic, body centered cubic, and face centered cubic lattices. Jonas Sonnenschein, Aishwarya Chauhan, Yasir Iqbal, Johannes Reuther. Physical Review B. 102 . 125140 . 2020.
• Quantum and Classical Phases of the Pyrochlore Heisenberg Model with Competing Interactions. Yasir Iqbal, Tobias Müller, Pratyay Ghosh, Michel J. P. Gingras, Harald O. Jeschke, Stephan Rachel, Johannes Reuther, Ronny Thomale. Physical Review X. 9 . 011005 . 2019.
• Breathing chromium spinels: a showcase for a variety of pyrochlore Heisenberg Hamiltonians. P. Ghosh, Y. Iqbal, T. Müller, R. T. Ponnaganti, R. Thomale, R. Narayanan, J. Reuther, M. J. P. Gingras, H. O. Jeschke. npj Quantum Materials. 4 . 63. 2019.
• Affine lattice construction of spiral surfaces in frustrated Heisenberg models. Péter Balla, Yasir Iqbal, and Karlo Penc. Physical Review B. 100 . 140402. 2019.
• Characterization of quantum spin liquids and their spinon band structures via functional renormalization. Max Hering, Jonas Sonnenschein, Yasir Iqbal, Johannes Reuther. Physical Review B. 99 . 100405 . 2019.
• Quantum paramagnetism and helimagnetic orders in the Heisenberg model on the body centered cubic lattice. P. Ghosh, T. Müller, F. P. Toldin, J. Richter, R. Narayanan, R. Thomale, J. Reuther, Y. Iqbal. Physical Review B. 100 . 014420 . 2019.
• Persistence of the gapless spin liquid in the breathing kagome Heisenberg antiferromagnet. Yasir Iqbal, Didier Poilblanc, Ronny Thomale, Federico Becca. Physical Review B. 97 . 115127 . 2018.
• Stability of the spiral spin liquid in MnSc2S4. Yasir Iqbal, Tobias Müller, Harald O. Jeschke, Ronny Thomale, Johannes Reuther. Phys. Rev. B. 98 . 064427 . 2018.
• Signatures of a gearwheel quantum spin liquid in a spin-1/2 pyrochlore molybdate Heisenberg antiferromagnet. Yasir Iqbal, Tobias Müller, Kira Riedl, Johannes Reuther, Stephan Rachel, Roser Valentí, Michel J. P. Gingras, Ronny Thomale, Harald O. Jeschke. Phys. Rev. Materials. 1 . 071201 . 2017.
• Spin liquid nature in the Heisenberg J1-J2 triangular antiferromagnet. Yasir Iqbal, Wen-Jun Hu, Ronny Thomale, Didier Poilblanc, Federico Becca. Phys. Rev. B. 93 . 144411 . 2016.
• Functional renormalization group for three-dimensional quantum magnetism. Yasir Iqbal, Ronny Thomale, Francesco Parisen Toldin, Stephan Rachel, Johannes Reuther. Phys. Rev. B. 94 . 140408 . 2016.
• Comment on "Z2 spin liquid phase on the kagome lattice: a new saddle point", by Tao Li [arXiv:1601.02165 (2016)]. Yasir Iqbal, Didier Poilblanc, Federico Becca. arXiv [cond-mat.str-el]. 1606.02255. 2016.
• Intertwined nematic orders in a frustrated ferromagnet. Yasir Iqbal, Pratyay Ghosh, Rajesh Narayanan, Brijesh Kumar, Johannes Reuther, Ronny Thomale. Phys. Rev. B. 94 . 224403 . 2016.
• Spin-1/2 Heisenberg J1-J2 antiferromagnet on the kagome lattice. Yasir Iqbal, Didier Poilblanc, Federico Becca. Phys. Rev. B. 91 . 020402 . 2015.
• Lanczos steps to improve variational wave functions. Federico Becca, Wen-Jun Hu, Yasir Iqbal, Alberto Parola, Didier Poilblanc, Sandro Sorella. J. Phys.: Conf. Ser.. 640 . 012039 . 2015.
• Paramagnetism in the kagome compounds (Zn,Mg,Cd)Cu3(OH)6Cl2. Yasir Iqbal, Harald O. Jeschke, Johannes Reuther, Roser Valentí, I. I. Mazin, Martin Greiter, Ronny Thomale. Phys. Rev. B. 92 . 220404 . 2015.
• Vanishing spin gap in a competing spin-liquid phase in the kagome Heisenberg antiferromagnet. Yasir Iqbal, Didier Poilblanc, Federico Becca. Phys. Rev. B. 89 . 020407 . 2014.
• Gapless spin-liquid phase in the kagome spin-1/2 Heisenberg antiferromagnet. Yasir Iqbal, Federico Becca, Sandro Sorella, Didier Poilblanc. Phys. Rev. B. 87 . 060405 . 2013.
• Quantum-statistics-induced flow patterns in driven ideal Fermi gases. Marco Beria, Yasir Iqbal, Massimiliano Di Ventra, Markus Müller. Phys. Rev. A. 88 . 043611 . 2013.
• Valence-bond crystals in the kagome spin-1/2 Heisenberg antiferromagnet: a symmetry classification and projected wave function study. Yasir Iqbal, Federico Becca, Didier Poilblanc. New J. Phys.. 14 . 115031 . 2012.
• Valence-bond crystal in the extended kagome spin-1/2 quantum Heisenberg antiferromagnet: A variational Monte Carlo approach. Yasir Iqbal, Federico Becca, Didier Poilblanc. Phys. Rev. B. 83 . 100404 . 2011.
• Projected wave function study of Z2 spin liquids on the kagome lattice for the spin-1/2 quantum Heisenberg antiferromagnet. Yasir Iqbal, Federico Becca, Didier Poilblanc. Phys. Rev. B. 84 . 020407 . 2011.

Teaching

• 2018 :  (Jan - May) - PH5720 Numerical Methods and Programming Lab; (Jul - Nov) - PH5730 Methods of Computational Physics
• 2019 :  (Jan - May) - PH1020 Physics II
• 2020 :  (Jan - May) - PH1020 Physics II
• 2021 :  (Jan - May) - PH1020 Physics II ; (Jul - Nov) - EP4040 Seminar / EP4140 Project / PH1010 Physics I
• 2022 :  (Jan - May) - EP4150 Project / PH1020 Physics II ; (Jul - Nov) - PH1010 Physics I
• 2023 :  (Jan - May) - PH1020 Physics II / PH5680 Superconductivity & Its Applications