K. Karmakar

The spontaneous Hall effect (SHE), a finite voltage occurring transversal to the electrical current in zero-magnetic field, has been observed in both conventional and unconventiona…

cond-mat.mtrl-sci2021★ 7 cited

Crystal growth, characterization and phase transition of PbCuTe $_{2}$ O $_{6}$

A. R. N. Hanna, A. T. M. N. Islam, R. Feyerherm +4

Single crystals of the three-dimensional frustrated magnet and spin liquid candidate compound PbCuTe $_{2}$ O $_{6}$ were grown using both the Travelling Solvent Floating Zone (TSFZ) and…

cond-mat.str-el2020★ 5 cited

Giant orbital polarization of Ni $^{2 +}$ in square planar environment

Prithwijit Mandal, Ranjan Kumar Patel, Dibyata Rout +7

Understanding the electronic behavior of Ni $^{2 +}$ in a square planar environment of oxygen is the key to unravel the origin of the recently discovered superconductivity in the hol…

cond-mat.str-el2018★ 1 cited

Effect of magnetic and non-magnetic impurities on the spin dimers in the spin 1/2 chains of quantum magnet Sr $_{14}$ Cu $_{24}$ O $_{41}$

Rabindranath Bag, Koushik Karmakar, Sudesh Dhar +3

We study the effect of impurities on the two types of spin-dimers in the hybrid chain/ladder spin 1/2 quantum magnet Sr $_{14}$ Cu $_{24}$ O $_{41}$ . Four different impurities were used…

cond-mat.str-el2017★ 10 cited

The effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO $_{2}$ probed by NMR

Yannic Utz, Franziska Hammerath, Roberto Kraus +14

The S=1/2 Heisenberg spin chain compound SrCuO2 doped with different amounts of nickel (Ni), palladium (Pd), zinc (Zn) and cobalt (Co) has been studied by means of Cu nuclear magne…

cond-mat.str-el2017★ 11 cited

Impurities in weakly coupled quantum spin chains Sr $_{2}$ CuO $_{3}$ and SrCuO $_{2}$

Koushik Karmakar, Rabindranath Bag, Markos Skoulatos +2

We study the effect of non-magnetic Zn $^{2 +}$ (spin- $0$ ) and magnetic Ni $^{2 +}$ (spin- $1$ ) impurities on the ground state and low-lying excitations of the quasi-one-dimensional spi…

cond-mat.str-el2016★ 8 cited

Effects of quantum impurity spins on the magnetic properties of zigzag and linear spin chains

Koushik Karmakar, Markos Skoulatos, Giacomo Prando +5

We investigated the magnetic ground state and low-energy excitations of the spin chains compounds SrCuO $_{2}$ (zigzag chains) and Sr $_{2}$ CuO $_{3}$ (linear chains) in the presence…

cond-mat.str-el2015★ 14 cited

Crystal growth of the non-magnetic Zn $^{2 +}$ and magnetic Co $^{2 +}$ doped quasi one-dimensional spin chain compound SrCuO $_{2}$ using the travelling solvent floating zone method

Koushik Karmakar, Amartya Singh, Surjeet Singh +2

We report on the crystal growth of the quasi one-dimensional quantum spin chain compound SrCuO $_{2}$ and its doped variants containing magnetic cobalt (0.25%, 0.5%, 1% and 2.5%) an…

cond-mat.str-el2015★ 18 cited

Finite-size effects in the quasi-one-dimensional quantum magnets Sr $_{2}$ CuO $_{3}$ , Sr $_{2}$ Cu $_{0.99}$ M $_{0.01}$ O $_{3}$ (M = Ni, Zn), and SrCuO $_{2}$

Koushik Karmakar, Surjeet Singh

We studied the finite-size effects on the magnetic behavior of the quasi-one-dimensional spin S = $\frac{1}{2}$ Heisenberg antiferromagnets Sr $_{2}$ CuO $_{3}$ , Sr $_{2}$ Cu $_{0.99}$ M$…

Inhomogeneity-driven multiform Spontaneous Hall Effect in conventional and unconventional superconductors

Crystal growth, characterization and phase transition of PbCuTe2​O6​

Giant orbital polarization of Ni2+ in square planar environment

Effect of magnetic and non-magnetic impurities on the spin dimers in the spin 1/2 chains of quantum magnet Sr14​Cu24​O41​

The effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO2​ probed by NMR

Impurities in weakly coupled quantum spin chains Sr2​CuO3​ and SrCuO2​