866 citations · 4.7k across the 66 of their papers we have counts for
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Microscopic evidence of dominant excitonic instability in Ta2NiSe5
Seokjin Bae, Arjun Raghavan, Irena Feldman +2
An excitonic insulator (EI) is a charge-neutral bosonic condensate of spontaneously formed electron-hole pairs. Exotic quantum phenomena such as dissipationless charge neutral tran…
Dynamic competition between phason and amplitudon observed by ultrafast multimodal scanning tunneling microscopy
Seokjin Bae, Arjun Raghavan, Soyeun Kim +7
The intertwining between two ordered states that arise from the same interactions is reflected in the dynamics of their coupled collective excitations. While the equilibrium phase…
Discovery of a 1D edge mode in a Magnetic Topological semimetal
Avior Almoalem, Rebecca Chan, Brinda Kuthanazhi +6
In rare-earth monopnictides like NdBi, the interplay between magnetism and topology results in an extremely unusual topological semimetal phase which simultaneously hosts Weyl poin…
Ultrafast optical control of charge orders in kagome metals
Yu-Ping Lin, Vidya Madhavan, Joel E. Moore
We show that ultrafast optical pump pulses provide effective control over charge orders in the kagome metals VSb with K, Rb, and Cs. Starting from the real charge d…
Absence of a bulk charge density wave signature in x-ray measurements of UTe
Caitlin S. Kengle, Dipanjan Chaudhuri, Xuefei Guo +12
The long-sought pair density wave (PDW) is an exotic phase of matter in which charge density wave (CDW) order is intertwined with the amplitude or phase of coexisting, superconduct…
Atomic-Scale Visualization of a Cascade of Magnetic Orders in the Layered Antiferromagnet
Arjun Raghavan, Marisa Romanelli, Julian May-Mann +8
is a layered antiferromagnet which has attracted attention due to its exceptionally high mobility, distinctive unidirectional incommensurate charge density wave (CDW), s…
Optical Manipulation of the Charge Density Wave state in RbV3Sb5
Yuqing Xing, Seokjin Bae, Ethan Ritz +8
Broken time-reversal symmetry in the absence of spin order indicates the presence of unusual phases such as orbital magnetism and loop currents. The recently discovered family of k…
Spin-selective tunneling from nanowires of the candidate topological Kondo insulator SmB6
Anuva Aishwarya, Zhuozhen Cai, Arjun Raghavan +9
Incorporating relativistic physics into quantum tunneling can lead to exotic behavior such as perfect transmission via Klein tunneling. Here, we probe the tunneling properties of s…
Metal-to-insulator transition in Pt-doped TiSe driven by emergent network of narrow transport channels
Kyungmin Lee, Jesse Choe, Davide Iaia +13
Metal-to-insulator transitions (MIT) can be driven by a number of different mechanisms, each resulting in a different type of insulator -- Change in chemical potential can induce a…
Local Spectroscopies Reveal Percolative Metal in Disordered Mott Insulators
Joseph C. Szabo, Kyungmin Lee, Vidya Madhavan +1
We elucidate the mechanism by which a Mott insulator transforms into a non-Fermi liquid metal upon increasing disorder at half filling. By correlating maps of the local density of…
Visualizing 1D zigzag Wigner crystallization at domain walls in the Mott insulator TaS
Anuva Aishwarya, Sean Howard, Bikash Padhi +4
In a certain regime of low carrier densities and strong correlations, electrons can crystallize into a periodic arrangement of charge known as Wigner crystal. Such phases are parti…
Doping induced Mott collapse and the density wave instabilities in (SrLa)IrO
Zhenyu Wang, Daniel Walkup, Yulia Maximenko +5
The path from a Mott insulating phase to high temperature superconductivity encounters a rich set of unconventional phenomena involving the insulator-to-metal transition (IMT) such…
Disorder induced power-law gaps in an insulator-metal Mott transition
Zhenyu Wang, Yoshinori Okada, Jared O'Neal +11
A correlated material in the vicinity of an insulator-metal transition (IMT) exhibits rich phenomenology and variety of interesting phases. A common avenue to induce IMTs in Mott i…
Topological nature of step edge states on the surface of topological crystalline insulator PbSnSe
Davide Iaia, Chang-Yan Wang, Yulia Maximenko +5
In addition to novel surface states, topological insulators can also exhibit robust gapless states at crystalline defects. Step edges constitute a class of common defects on the su…
Quasiparticle Interference and Strong Electron-Mode Coupling in the Quasi-One-Dimensional Bands of SrRuO
Zhenyu Wang, Daniel Walkup, Philip Derry +13
The single-layered ruthenate SrRuO has attracted a great deal of interest as a spin-triplet superconductor with an order parameter that may potentially break time reversal…
The influence of electron-doping on the ground state of (Sr{1-x}La{x})2IrO4
Xiang Chen, Tom Hogan, D. Walkup +11
The evolution of the electronic properties of electron-doped (Sr{1-x}La{x})2IrO4 is experimentally explored as the doping limit of La is approached. As electrons are introduced, th…
First-order melting of a weak spin-orbit Mott insulator into a correlated metal
Tom Hogan, Z. Yamani, D. Walkup +7
The electronic phase diagram of the weak spin-orbit Mott insulator (Sr(1-x)Lax)3Ir2O7 is determined via an exhaustive experimental study. Upon doping electrons via La substitution,…
Mapping the unconventional orbital texture in topological crystalline insulators
Ilija Zeljkovic, Yoshinori Okada, Cheng-Yi Huang +11
The newly discovered topological crystalline insulators (TCIs) harbor a complex band structure involving multiple Dirac cones. These materials are potentially highly tunable by ext…
Carrier localization and electronic phase separation in a doped spin-orbit driven Mott phase in Sr3(Ir1-xRux)2O7
Chetan Dhital, Tom Hogan, Wenwen Zhou +13
Interest in many strongly spin-orbit coupled 5d-transition metal oxide insulators stems from mapping their electronic structures to a J=1/2 Mott phase. One of the hopes is to estab…
Coexistence of competing orders with two energy gaps in real and momentum space in high-Tc superconductor Bi2Sr2-xLaxCuO6+delta
J. -H. Ma, Z. -H. Pan, F. C. Niestemski +12
The superconducting phase of the high-Tc cuprates has been thought to be described by a single d-wave pairing order parameter. Recently, there has been growing evidence suggesting…
Imaging the granular structure of high-Tc superconductivity in underdoped Bi2Sr2CaCu2O8+x
K. M. Lang, V. Madhavan, J. E. Hoffman +4
Granular superconductivity occurs when microscopic superconducting grains are separated by non-superconducting regions through which they communicate by Josephson tunneling to esta…