132 citations · 1.3k across the 32 of their papers we have counts for
30 papers · 1 filter
Effects of spin orbit coupling on proximity induced superconductivity
Vivek Mishra, Yu Li, Fu-Chun Zhang +1
We investigate the effect of spin orbit coupling on proximity induced superconductivity in a normal metal attached to a superconductor. Specifically, we consider a heterostructure…
Two-stage superconductivity in the Hatsugai-Kohmoto-BCS model
Yu Li, Vivek Mishra, Yi Zhou +1
Superconductivity in strongly correlated electrons can emerge out from a normal state that is beyond the Landau's Fermi liquid paradigm, often dubbed as "non-Fermi liquid". While t…
Comment on "Anisotropic Scattering Caused by Apical Oxygen Vacancies in Thin Films of Overdoped High-Temperature Cuprate Superconductors"
H. U. Özdemir, Vivek Mishra, N. R. Lee-Hone +4
In Phys. Rev. Lett. 128, 137001 (2022), Wang address an important problem in the overdoped cuprates, taking the first steps toward understanding the structure of…
Effect of realistic out-of-plane dopant potentials on the superfluid density of overdoped cuprates
H. U. Özdemir, Vivek Mishra, N. R. Lee-Hone +4
Recent experimental papers on hole-doped overdoped cuprates have argued that a series of observations showing unexpected behavior in the superconducting state imply the breakdown o…
Enhanced two-component superconductivity in CoSi2/TiSi2 heterojunctions
Shao-Pin Chiu, Vivek Mishra, Yu Li +3
We report enhanced two-component superconductivity in (CoSi2/Si)/TiSi2 superconductor/normal-metal (S/N) heterojunctions. An enhanced superconducting transition temperature about t…
Effects of spin orbit coupling in superconducting proximity devices -- application to heterostructures
Vivek Mishra, Yu Li, Fu-Chun Zhang +1
Motivated by the recent findings of unconventional superconductivity in heterostructures, we study the effect of interface induced Rashba spin orbit coup…
Charge density wave and superconductivity competition in LuIrSi : a proton irradiation study
Maxime Leroux, Vivek Mishra, Christine Opagiste +4
Real-space modulated Charge Density Waves (CDW) are an ubiquituous feature in many families of superconductors. In particular, how CDW relates to superconductivity is an active and…
From Mott to not: phenomenology of overdoped cuprates
N. R. Lee-Hone, H. U. Özdemir, V. Mishra +2
Recently, we have argued that experimental data on superfluid density and terahertz conductivity of overdoped LSCO are compatible with a Landau Fermi liquid/Bardeen-Cooper-Schrieff…
Effective pairing interaction in a system with an incipient band
Thomas A. Maier, Vivek Mishra, Douglas J. Scalapino
The nature and mechanism of superconductivity in the extremely electron-doped FeSe based superconductors continues to be a matter of debate. In these systems, the hole-like band ha…
Optical conductivity of overdoped cuprate superconductors: application to LSCO
N. R. Lee-Hone, V. Mishra, D. M. Broun +1
We argue that recent measurements on both the superfluid density and the optical conductivity of high-quality LSCO films can be understood almost entirely within the theory of diso…
Using controlled disorder to probe the interplay between charge order and superconductivity in NbSe2
Kyuil Cho, M. Konczykowski, S. Teknowijoyo +10
The interplay between superconductivity and charge density waves (CDW) in -NbSe2 is not fully understood despite decades of study. Artificially introduced disorder can tip the d…
Robust odd-parity superconductivity in the doped topological insulator NbBiSe
M. P. Smylie, K. Willa, H. Claus +10
We present resistivity and magnetization measurements on proton-irradiated crystals demonstrating that the superconducting state in the doped topological superconductor NbBi$_2…
Effect of disorder on the competition between nematic and superconducting order in FeSe
V. Mishra, P. J. Hirschfeld
Crystalline FeSe is known to display strong nematic order below a weak tetragonal-orthorhombic structural transition around K, and a superconducting transition at $T_c\…
Effect of nonmagnetic impurities on superconductivity in the presence of incipient bands
X. Chen, V. Mishra, S. Maiti +1
Several Fe chalcogenide superconductors without hole pockets at the Fermi level display high temperature superconductivity, in apparent contradiction to naive spin fluctuation pair…
Enhancement of Tc by point-like disorder and anisotropic gap in FeSe
S. Teknowijoyo, K. Cho, M. A. Tanatar +8
A highly anisotropic superconducting gap is found in single crystals of FeSe by studying the London penetration depth, , measured down to 50 mK in samples before and after 2.5…
Energy Gap Evolution Across the Superconductivity Dome in Single Crystals of (BaK)FeAs
Kyuil Cho, M. Konczykowski, S. Teknowijoyo +8
The mechanism of unconventional superconductivity in iron-based superconductors (IBSs) is one of the most intriguing questions in current materials research. Among non-oxide IBSs,…
s pairing near a Lifshitz transition
Vivek Mishra, Douglas J. Scalapino, Thomas A. Maier
Observation of robust superconductivity in some of the iron based superconductors in the vicinity of a Lifshitz point where a spin density wave instability is suppressed as the {ho…
Measurement of the dynamic charge response of materials using low-energy, momentum-resolved electron energy-loss spectroscopy (M-EELS)
Sean Vig, Anshul Kogar, Matteo Mitrano +9
One of the most fundamental properties of an interacting electron system is its frequency- and wave-vector-dependent density response function, . The imaginary part,…
Pairing in the Presence of a Pseudogap
T. A. Maier, P. Staar, D. J. Scalapino
Evidence that the pseudogap (PG) in a near-optimally doped BiSrCaCuO sample destroys the BCS logarithmic pairing instability [1] raises again the question of th…
Local spin-density-wave order inside vortex cores in multiband superconductors
Vivek Mishra, Alexei E. Koshelev
Coexistence of antiferromagnetic order with superconductivity in many families of newly discovered iron-based superconductors has renewed interest to this old problem. Due to compe…
Disorder-induced topological change of the superconducting gap structure in iron pnictides
Y. Mizukami, M. Konczykowski, Y. Kawamoto +9
In superconductors with unconventional pairing mechanisms, the energy gap in the excitation spectrum often has nodes, which allow quasiparticle excitations at low energies. In many…
Effect of electron irradiation on superconductivity in single crystals of Ba(FeRu)As (0.24)
R. Prozorov, M. Kończykowski, M. A. Tanatar +5
A single crystal of isovalently substituted Ba(FeRu)As () was sequentially irradiated with 2.5 MeV electrons up to a maximum dose of $2.1 \times 10^{1…
Effect of the pseudogap on T in the cuprates and implications for its origin
Vivek Mishra, U. Chatterjee, J. C. Campuzano +1
One of the most intriguing aspects of cuprates is a large pseudogap coexisting with a high superconducting transition temperature. Here, we study pairing in the cuprates from elect…
London Penetration Depth and Pair Breaking
V. G. Kogan, R. Prozorov, V. Mishra
The London penetration depth is evaluated for isotropic materials for any transport and pair-breaking Born scattering rates. Besides known results, a number of new features are fou…