2024

Enhanced magnetization by defect-assisted exciton recombination in atomically thin CrCl₃

Xin-Yue Zhang, Thomas K. M. Graham, Hyeonhu Bae, Yu-Xuan Wang, Nazar Delegan, Jonghoon Ahn, Zhi-Cheng Wang, Jakub Regner, Kenji Watanabe, Takashi Taniguchi, Minkyung Jung, Zdeněk Sofer, Fazel Tafti, David D. Awschalom, F. Joseph Heremans, Binghai Yan, and Brian B. Zhou

Phys. Rev. Materials 8, 104402 (2024) ; Funding source: DOE

Topological Hall effect induced by chiral fluctuations in ErMn₆Sn₆

Kyle Fruhling, Alenna Streeter, Sougata Mardanya, Xiaoping Wang, Priya Baral, Oksana Zaharko, Igor I. Mazin, Sugata Chowdhury, William D. Ratcliff, Fazel Tafti

Phys. Rev. Materials 8, 094411 (2024) ; Funding source: AFOSR/NSF

Nonlinear optical diode effect in a magnetic Weyl semimetal

Christian Tzschaschel, Jian-Xiang Qiu, Xue-Jian Gao, Hou-Chen Li, Chunyu Guo, Hung-Yu Yang, Cheng-Ping Zhang, Ying-Ming Xie, Yu-Fei Liu, Anyuan Gao, Damien Bérubé, Thao Dinh, Sheng-Chin Ho, Yuqiang Fang, Fuqiang Huang, Johanna Nordlander, Qiong Ma, Fazel Tafti, Philip J. W. Moll, Kam Tuen Law, Su-Yang Xu

Nature Communications 15, 3017 (2024) ; Funding source: AFOSR

Manipulating magnetism and transport properties of EuCd₂P₂ with a low carrier concentration

Xiyu Chen, Ziwen Wang, Zhiyu Zhou, Wuzhang Yang, Yi Liu, Jia-Yi Lu, Zhi Ren, Guang-Han Cao, Fazel Tafti, Shuai Dong, Zhi-Cheng Wang

Phys. Rev. B 109, 224428 (2024) ; Funding source: AFOSR

Characterization of the magnetocaloric effect in RMn₆Sn₆ including high-entropy forms

Kyle Fruhling, Xiaohan Yao, Alenna Streeter, Fazel Tafti

Materials Chemistry and Physics 319, 129230 (2024) ; Funding source: NSF/DOE

Engineering Anomalously Large Electron Transport in Topological Semimetals

Vincent M. Plisson, Xiaohan Yao, Yaxian Wang, George Varnavides, Alexey Suslov, David Graf, Eun Sang Choi, Hung-Yu Yang, Yiping Wang, Marisa Romanelli, Grant McNamara, Birender Singh, Gregory T. McCandless, Julia Y. Chan, Prineha Narang, Fazel Tafti, Kenneth S. Burch

Advanced Materials 37, 2310944 (2024) ; Funding source: DOE

2023

Signatures of a Majorana-Fermi surface in the Kitaev magnet Ag₃LiIr₂O₆

Joshuah T. Heath, Faranak Bahrami, Sangyun Lee, Roman Movshovich, Xiao Chen, Fazel Tafti, Kevin Bedell

Communications Physics 6, 348 (2023) ; Funding source: DOE

Momentum-independent magnetic excitation continuum in the honeycomb iridate H₃LiIr₂O₆

A. de la Torre, B. Zager, F. Bahrami, M. H. Upton, J. Kim, G. Fabbris, G.-H. Lee, W. Yang, D. Haskel, F. Tafti, K. W. Plumb

Nature Communications 14, 5018 (2023) ; Funding source: NSF

Introducing the monoclinic polymorph of the honeycomb magnet Na₂Co₂TeO₆

Emilie Dufault, Faranak Bahrami, Alenna Streeter, Xiaohan Yao, Enrique Gonzalez, Qiang Zhang, Fazel Tafti

Phys. Rev. B 108, 064405 (2023) ; Funding source: NSF

Extreme sensitivity of the magnetic ground state to halide composition in FeCl_3-xBr_x

Andrew Cole, Alenna Streeter, Adolfo O. Fumega, Xiaohan Yao, Zhi-Cheng Wang, Erxi Feng, Huibo Cao, Jose L. Lado, Stephen E. Nagler, Fazel Tafti

Phys. Rev. Materials 7, 064401 (2023) ; Funding source: NSF

Observation of Fermi arcs and Weyl nodes in a noncentrosymmetric magnetic Weyl semimetal

Anup Pradhan Sakhya, Cheng-Yi Huang, Gyanendra Dhakal, Xue-Jian Gao, Sabin Regmi, Baokai Wang, Wei Wen, R.-H. He, Xiaohan Yao, Robert Smith, Milo Sprague, Shunye Gao, Bahadur Singh, Hsin Lin, Su-Yang Xu, Fazel Tafti, Arun Bansil, Madhab Neupane

Phys. Rev. Materials 7, L051202 (2023) ; Funding source: AFOSR

Spin-carrier coupling induced ferromagnetism and giant resistivity peak in EuCd₂P₂

V. Sunko, Y. Sun, M. Vranas, C. C. Homes, C. Lee, E. Donoway, Z.-C. Wang, S. Balguri, M. B. Mahendru, A. Ruiz, B. Gunn, R. Basak, S. Blanco-Canosa, E. Schierle, E. Weschke, F. Tafti, A. Frano, J. Orenstein

Phys. Rev. B 107, 104404 (2023) ; Funding source: SIGECS

Spin-orbital order and excitons in magnetoresistive HoBi

J. Gaudet, H.-Y. Yang, E. M. Smith, T. Halloran, J. P. Clancy, J. A. Rodriguez-Rivera, Guangyong Xu, Y. Zhao, W. C. Chen, G. Sala, A. A. Aczel, B. D. Gaulin, F. Tafti, C. Broholm

Phys. Rev. B 107, 104423 (2023) ; Funding source: DOE

Stripe helical magnetism and two regimes of anomalous Hall effect in NdAlGe

Hung-Yu Yang, Jonathan Gaudet, Rahul Verma, Santu Baidya, Faranak Bahrami, Xiaohan Yao, Cheng-Yi Huang, Lisa DeBeer-Schmitt, Adam A. Aczel, Guangyong Xu, Hsin Lin, Arun Bansil, Bahadur Singh, Fazel Tafti

Phys. Rev. Materials 7, 034202 (2023)  ; Funding source: AFOSR

Topological Hall effect and spiral magnetic order in the Weyl semimetal SmAlSi

Xiaohan Yao, Jonathan Gaudet, Rahul Verma, David E. Graf, Hung-Yu Yang, Faranak Bahrami, Ruiqi Zhang, Adam A. Aczel, Sujan Subedi, Darius H. Torchinsky, Jianwei Sun, Arun Bansil, Shin-Ming Huang, Bahadur Singh, Peter Blaha, Predrag Nikolić, Fazel Tafti

Phys. Rev. X 13, 01105 (2023) ; Funding source: AFOSR

Gravitational anomaly in the ferrimagnetic topological Weyl semimetal NdAlSi

Pardeep Kumar Tanwar, Mujeeb Ahmad, Md Shahin Alam, Xiaohan Yao, Fazel Tafti, Marcin Matusiak

Phys. Rev. B 108, L161106 (2023) ; Funding source: AFOSR

Sign change of anomalous Hall effect and anomalous Nernst effect in the Weyl semimetal CeAlSi

Md Shahin Alam, Amar Fakhredine, Mujeeb Ahmad, P. K. Tanwar, Hung-Yu Yang, Fazel Tafti, Giuseppe Cuono, Rajibul Islam, Bahadur Singh, Artem Lynnyk, Carmine Autieri, Marcin Matusiak

Phys. Rev. B 107, 085102 (2023) ; Funding source: NSF

Visualization of bulk and edge photocurrent flow in anisotropic Weyl semimetals

Yu-Xuan Wang, Xin-Yue Zhang, Chunhua Li, Xiaohan Yao, Ruihuan Duan, Thomas K. M. Graham, Zheng Liu, Fazel Tafti, David Broido, Ying Ran, Brian B. Zhou

Nature Physics 19, 507 (2023) ; Funding source: AFOSR

Optical properties and carrier localization in the layered phosphide EuCd₂P₂

C. C. Homes, Z.-C. Wang, K. Fruhling, F. Tafti

Phys. Rev. B 107, 045106 (2023) ; Funding source: NSF

2022

Plethora of tunable Weyl fermions in kagome magnet Fe₃Sn₂

Zheng Ren, Hong Li, Shrinkhala Sharma, Dipak Bhattarai, He Zhao, Bryan Rachmilowitz, Faranak Bahrami, Fazel Tafti, Shiang Fang, Madhav Prasad Ghimire, Ziqiang Wang, Ilija Zeljkovic

npj Quantum Materials 7, 109 (2022) ; Funding source: NSF

Large phonon thermal Hall conductivity in the antiferromagnetic insulator Cu₃TeO₆

Lu Chen, Marie-Eve Boulanger, Zhi-Cheng Wang, Fazel Tafti, Louis Taillefer

PNAS 119, e2208016119 (2022) ; Funding source: AFOSR

Pressure dependent magnetic properties on bulk CrBr₃ single crystals 

Rubyann Olmos, Shamsul Alam, Po-Hao Chang, Kinjal Gandha, Ikenna C. Nlebedim, Andrew Cole, Fazel Tafti, Rajendra R. Zope, Srinivasa R. Singamaneni

J. Alloys. Comp., 911, 165034 (2022) ; Funding source: NSF

Anisotropy of the magnetic and transport properties of EuZn₂As₂

Zhi-Cheng Wang, Emily Been, Jonathan Gaudet, Gadeer Matook A. Alqasseri, Kyle Fruhling, Xiaohan Yao, Uwe Stuhr, Qinqing Zhu, Zhi Ren, Yi Cui, Chunjing Jia, Brian Moritz, Sugata Chowdhury, Thomas Devereaux, Fazel Tafti

Phys. Rev. B, 105, 165122 (2022) ; Funding source: AFOSR

First demonstration of tuning between the Kitaev and Ising limits in a honeycomb lattice

Faranak Bahrami, Xiaodong Hu, Yonghua Du, Oleg I. Lebedev, Chennan Wang, Hubertus Luetkens, Gilberto Fabbris, Michael J. Graf, Daniel Haskel, Ying Ran, Fazel Tafti

Science Advances, 8, eabl5671 (2022) ; Funding source: NSF

Metastable Kitaev Magnets

Faranak Bahrami, Mykola Abramchuk, Oleg Lebedev, Fazel Tafti

Molecules, 27(3), 871 (2022) ; Funding source: NSF

2021

Mapping domain-wall topology in the magnetic Weyl semimetal CeAlSi

Yue Sun, Changmin Lee, Hung-Yu Yang, Darius H. Torchinsky, Fazel Tafti, Joseph Orenstein

Phys. Rev. B 104, 235119 (2021)

Enhanced hybridization in the electronic ground state of the intercalated honeycomb iridate Ag₃LiIr₂O₆ 

A. de la Torre, B. Zager, F. Bahrami, M. DiScala, J. R. Chamorro, M. H. Upton, G. Fabbris, D. Haskel, D. Casa, T. M. McQueen, F. Tafti, K. W. Plumb

Phys. Rev. B 104, L100416 (2021)

Evidence of a coupled electron-phonon liquid in NbGe₂

Hung-Yu Yang, Xiaohan Yao, Vincent Plisson, Shirin Mozaffari, Jan P. Scheifers, Aikaterini Flessa Savvidou, Eun Sang Choi, Gregory T. McCandless, Mathieu F. Padlewski, Carsten Putzke, Philip J. W. Moll, Julia Y. Chan, Luis Balicas, Kenneth S. Burch, Fazel Tafti

Nature Communications 12, 5292 (2021)

AC Susceptometry of 2D van der Waals Magnets Enabled by the Coherent Control of Quantum Sensors

Xin-Yue Zhang, Yu-Xuan Wang, Thomas A. Tartaglia, Thomas Ding, Mason J. Gray, Kenneth S. Burch, Fazel Tafti, and Brian B. Zhou

Phys. Rev. X Quantum 2, 030352 (2021)

Weyl-mediated helical magnetism in NdAlSi

Jonathan Gaudet, Hung-Yu Yang, Santu Baidya, Baozhu Lu, Guangyong Xu, Yang Zhao, Jose A. Rodriguez-Rivera, Christina M. Hoffmann, David E. Graf, Darius H. Torchinsky, Predrag Nikolić, David Vanderbilt, Fazel Tafti, Collin L. Broholm

Nature Materials 104, 014102 (2021)

Complex pressure-temperature structural phase diagram of the honeycomb iridate Cu₂IrO₃

G. Fabbris, A. Thorn, W. Bi, M. Abramchuk, F. Bahrami, J. H. Kim, T. Shinmei, T. Irifune, F. Tafti, A. N. Kolmogorov, D. Haskel

Phys. Rev. B 104, 014102 (2021)

Antiferromagnetic Order and Spin-Canting Transition in the Corrugated Square Net Compound Cu₃(TeO₄)(SO₄)·H₂O

 Zhi-Cheng Wang, Kulatheepan Thanabalasingam, Jan P. Scheifers, Alenna Streeter, Gregory T. McCandless, Jonathan Gaudet, Craig M. Brown, Carlo U. Segre, Julia Y. Chan, Fazel Tafti

Inorg. Chem. 60, 10565 (2021)

2D correlations in the van der Waals ferromagnet CrBr3 using high-frequency electron spin resonance spectroscopy

 C. L. Saiz, J. A. Delgado, J. van Tol, T. Tartaglia, F. Tafti, S. R. Singamaneni

Jour. App. Phys. 129, 233902 (2021)

NMR investigation on the honeycomb iridate Ag₃LiIr₂O₆

Jiaming Wang, Weishi Yuan, Takashi Imai, Philip M. Singer, Faranak Bahrami, Fazel Tafti

Phys. Rev. B 103, 214405 (2021)

Noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect

Hung-Yu Yang, Bahadur Singh, Jonathan Gaudet, Baozhu Lu, Cheng-Yi Huang, Wei-Chi Chiu, Shin-Ming Huang, Baokai Wang, Faranak Bahrami, Bochao Xu, Jacob Franklin, Ilya Sochnikov, David E. Graf, Guangyong Xu, Yang Zhao, Christina M. Hoffman, Hsin Lin, Darius H. Torchinsky, Collin L. Broholm, Arun Bansil, Fazel Tafti

Phys. Rev. B 103, 115143 (2021)

Effect of Structural Disorder on the Kitaev Magnet Ag₃LiIr₂O₆

Faranak Bahrami, Eric M. Kenney, Chennan Wang, Adam Berlie, Oleg I. Lebedev, Michael J. Graf, Fazel Tafti

Phys. Rev. B 103, 094427 (2021)

Picoscale Magnetoelasticity Governs Heterogeneous Magnetic Domains in a Noncentrosymmetric Ferromagnetic Weyl Semimetal

Bochao Xu, Jacob Franklin, Amani Jayacody, Hung‐Yu Yang, Fazel Tafti, Ilya Sochnikov

Advanced Quant. Tech. 4, 2000101 (2021)

Colossal Magnetoresistance without Mixed Valence in a Layered Phosphide Crystal

Zhi‐Cheng Wang, Jared D. Rogers, Xiaohan Yao, Renee Nichols, Kemal Atay, Bochao Xu, Jacob Franklin, Ilya Sochnikov, Philip J. Ryan, Daniel Haskel, Fazel Tafti

Advanced Materials 33, 2005755 (2021)

2020

Pressure-induced Magnetism in the Iron-based Superconductors AFe₂As₂ (A = K, Rb, Cs)

Rustem Khasanov. Zurab Guguchia, Elvezio Morenzoni, Chris Baines, Aifeng Wang, Xianhui Chen, Zbigniew Bukowski, Fazel Tafti

Phys. Rev. B. 102, 140502 (2020)

Accessing New Magnetic Regimes by Tuning the Ligand Spin-orbit Coupling in Van der Waals Magnets 

Thomas A. Tartaglia, Joseph N. Tang, Jose L. Lado, Faranak Bahrami, Mykola Abramchuk, Gregory T. McCandless, Meaghan C. Doyle, Kenneth S. Burch, Ying Ran, Julia Y. Chan, Fazel Tafti

Science Advances 6, eabb9379 (2020)

Transition from Intrinsic to Extrinsic Anomalous Hall Effect in the Ferromagnetic Weyl Semimetal PrAlGe_xSi_1-x 

Hung-Yu Yang, Bahadur Singh, Baozhu Lu, Cheng-Yi Huang, Faranak Bahrami, Wei-Chi Chiu, David Graf, Shin-Ming Huang, Baokai Wang, Hsin Lin, Darius Torchinsky, Arun Bansil, Fazel Tafti

APL Materials 8, 011111 (2020)

Transient Grating Measurements at Ultralow Probe Power 

Baozhu Lu, Mykola Abramchuk, Fazel Tafti, Darius H. Torchinsky

Jour. Opt. Soc. Am. B 37, 433 (2020)

2019

Thermodynamic Evidence of Proximity to a Kitaev Spin Liquid in Ag₃LiIr₂O₆

Faranak Bahrami, William Lafargue-Dit-Hauret, Oleg I. Lebedev, Roman Movshovich, Hung-Yu Yang, David Broido, Xavier Rocquefelte, Fazel Tafti

Phys. Rev. Lett 123, 237203 (2019)

Spin Excitations of a Proximate Kitaev Quantum Spin Liquid Realized in Cu₂IrO₃

Sean K. Takahashi, Jiaming Wang, Alexandre Arsenault, Takashi Imai, Mykola Abramchuk, Fazel Tafti, and Philip M. Singer

Phys. Rev. X 9, 031047 (2019)

Coexistence of Static and Dynamic Magnetism in the Kitaev Spin Liquid Material Cu₂IrO₃

Eric M. Kenney, Carlo U. Segre, William Lafargue-Dit-Hauret, Oleg I. Lebedev, Mykola Abramchuk, Adam Berlie, Stephen P. Cottrell, Gediminas Simutis, Faranak Bahrami, Natalia E. Mordvinova, Gilberto Fabbris, Jessica. L. McChesney, Daniel Haskel, Xavier Rocquefelte, Michael J. Graf, Fazel Tafti

Phys. Rev. B 100, 094418 (2019)

Tuning the Magnetic and Structural Properties of a Three-Metal Boride Alloy

Mykola Abramchuk, Thomas Mier, Fazel Tafti

Journal of Alloys and Compounds 805, 909 (2019)

2018

Crystal Chemistry and Phonon Heat Capacity in Quaternary Honeycomb Delafossites: Cu[Li_1/3Sn_2/3]O₂ and Cu[Na_1/3Sn_2/3]O₂  

Mykola Abramchuk, Oleg I. Lebedev, Olle Hellman, Faranak Bahrami, Natalia E. Mordvinova, Jason W. Krizan, Kenneth R. Metz, David Broido, and Fazel Tafti

Inorganic Chemistry 57, 12709 (2018) 

Interplay of Magnetism and Transport in HoBi  

H.-Y. Yang, J. Gaudet, A. A. Aczel, D. E. Graf, P. Blaha, B. D. Gaulin, Fazel Tafti

Phys. Rev. B 98, 045136 (2018) 

Effect of Hydrothermal Conditions on Superconductivity and Magnetism in [Li_1-x Fe_xOH]FeS  

E. McDonnell, S. Jaszewski, H.-Y. Yang, M. Abramchuk, Fazel Tafti

Materials Chemistry and Physics 217, 451 (2018) 

Au Dendrite Electrocatalysts for CO₂ Electrolysis

Nathan T. Nesbitt, Ming Ma, Bartek J. Trzesniewski, Samantha Jaszewski, Fazel Tafti, Michael J. Burns, Wilson Smith, Michael J. Naughton

J. Phys. Chem. C 122, 10006 (2018) 

Measurement of the atomic orbital composition of the near-fermi-level electronic states in the lanthanum monopnictides LaBi, LaSb, and LaAs

T. J. Nummy, J. A. Waugh, S. P. Parham, Q. Liu, H.-Y. YangephenH.-Y. Yang, H. Li, X. Zhou, N. C. Plumb, F. Tafti, and D. S. Dessau

npj Quantum Materials 3, 24 (2018) 

Controlling Magnetic and Optical Properties of the van der Waals Crystal CrCl_3−xBr_x via Mixed Halide Chemistry

Mykola Abramchuk, Samantha Jaszewski, Kenneth R. Metz, Gavin B. Osterhoudt, Yiping Wang, Kenneth S. Burch, Fazel Tafti

Advanced Materials 30, 1801325 (2018) 

2017

Extreme Magnetoresistance in the Topologically Trivial Lanthanum Monopnictide LaAs

H.-Y. Yang, T. Nummy, H. Li, S. Jaszewski, M. Abramchuk, D. S. Dessau, Fazel Tafti

Phy. Rev. B. 96, 235128 (2017) 

Cu2IrO3: a New Magnetically Frustrated Honeycomb Iridate

Mykola Abramchuk, Cigdem Ozsoy-Keskinbora, Jason W. Krizan, Kenneth R. Metz, David C. Bel, Fazel Tafti

J. Am. Chem. Soc. 139, 15371 (2017) 

Tuning the Electronic and the Crystalline Structure of LaBi by Pressure

F. F. Tafti, M. S. Torikachvili, R. R. Stillwell, B. Baer, E. Stavrou, S. T. Weir, Y. K. Vohra, H.-Y. Yang, E. F. McDonnell, S. K. Kushwaha, Q. D. Gibson, R. J. Cava, J. R. Jeffries

Phys. Rev. B 95, 014507 (2017)