461 citations · 2.1k across the 31 of their papers we have counts for
24 papers · 1 filter
Competition and coexistence of antiferromagnetism and superconductivity in RBa_2Cu_3O_{6+x} (R = Lu, Y) single crystals
A. N. Lavrov, L. P. Kozeeva, M. R. Trunin +1
We use c-axis resistivity and magnetoresistance measurements to study the interplay between antiferromagnetic (AF) and superconducting (SC) ordering in underdoped RBa_2Cu_3O_{6+x}…
Magnetic-field induced superconductor-antiferromagnet transition in lightly doped RBa_2Cu_3O_{6+x} (R = Lu, Y) crystals
A. N. Lavrov, L. P. Kozeeva, M. R. Trunin +1
The remarkable sensitivity of the c-axis resistivity and magnetoresistance in cuprates to the spin ordering is used to clarify the doping-induced transformation from an antiferroma…
Spin reorientation and in-plane magnetoresistance of lightly doped La_{2-x}Sr_{x}CuO_{4} in magnetic fields up to 55 T
S. Ono, Seiki Komiya, A. N. Lavrov +4
The magnetoresistance (MR) in the in-plane resistivity is measured in magnetic fields up to 55 T in lightly doped La_{2-x}Sr_{x}CuO_{4} in the Néel state (x = 0.01) and in the spin…
"Spin-Flop" Transition and Anisotropic Magnetoresistance in Pr_{1.3-x}La_{0.7}Ce_{x}CuO_{4}: Unexpectedly Strong Spin-Charge Coupling in Electron-Doped Cuprates
A. N. Lavrov, H. J. Kang, Y. Kurita +6
We use transport and neutron-scattering measurements to show that a magnetic-field-induced transition from noncollinear to collinear spin arrangement in adjacent CuO_{2} planes of…
Normal-state conductivity in underdoped La_{2-x}Sr_xCuO_4 thin films: Search for nonlinear effects related to collective stripe motion
A. N. Lavrov, I. Tsukada, Yoichi Ando
We report a detailed study of the electric-field dependence of the normal-state conductivity in La_{2-x}Sr_xCuO_4 thin films for two concentrations of doped holes, x=0.01 and 0.06,…
Anisotropic Magnetoresistance in Lightly Doped La_{2-x}Sr_{x}CuO_{4}: Impact of Anti-Phase Domain Boundaries on the Electron Transport
Yoichi Ando, A. N. Lavrov, Seiki Komiya
Detailed behavior of the magnetoresistance (MR) is studied in lightly doped antiferromagnetic La_{1.99}Sr_{0.01}CuO_{4}, where, thanks to the weak ferromagnetic moment due to spin…
Freezing of stripes in lightly-doped La_{2-x}Sr_{x}CuO_{4} as manifested in magnetic and transport properties of untwinned single crystals
A. N. Lavrov, Seiki Komiya, Yoichi Ando
Resistivity and magnetization measurements are used for studying the transverse sliding of AF domain boundaries in lightly doped La_{2-x}Sr_{x}CuO_{4}. We discuss that it is the fr…
Significant suppression of weak ferromagnetism in (LaEu)CuO
I. Tsukada, X. F. Sun, Seiki Komiya +2
The magnetic structure of (LaEu)CuO has been studied by magnetization measurements of single crystals, which show antiferromagnetic long-range order below…
Charge Transport Properties of Lightly-Doped Cuprates: Behavior of the Hall Coefficient
Yoichi Ando, Kouji Segawa, A. N. Lavrov +1
Behavior of ρ_{ab}(T) and R_{H}(T) is presented for LSCO and YBCO single crystals in the lightly hole-doped antiferromagnetic region, with an emphasis on the R_{H}(T) data. In both…
Magnetic shape-memory effects in La2-xSrxCuO4 crystals
A. N. Lavrov, Seiki Komiya, Yoichi Ando
The magnetic field affects the motion of electrons and the orientation of spins in solids, but it is believed to have little impact on the crystal structure. This common perception…
c-Axis Transport and Resistivity Anisotropy of Lightly- to Moderately-Doped La_{2-x}Sr_{x}CuO_{4} Single Crystals: Implications on the Charge Transport Mechanism
Seiki Komiya, Yoichi Ando, X. F. Sun +1
Both the in-plane and the out-of-plane resistivities (ρ_{ab} and ρ_{c}) are measured in high-quality La_{2-x}Sr_{x}CuO_{4} (LSCO) single crystals in the lightly- to moderately-dope…
Novel anisotropy in the superconducting gap structure of Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} probed by quasiparticle heat transport
Yoichi Ando, J. Takeya, Yasushi Abe +2
Since the nature of pairing interactions is manifested in the superconducting gap symmetry, the exact gap structure, particularly any deviation from the simple d_{x^2-y^2} symmetry…
Two mechanisms of pseudogap formation in Bi-2201: Evidence from the c-axis magnetoresistance
A. N. Lavrov, Yoichi Ando, S. Ono
Measurements of the c-axis resistivity and magnetoresistance have been used to investigate the pseudogap (PG) behavior in Bi_{2+z}Sr_{2-x-z}La_xCuO_y (Bi-2201) crystals at various…
Electrical Resistivity Anisotropy from Self-Organized One-Dimensionality in High-Temperature Superconductors
Yoichi Ando, Kouji Segawa, Seiki Komiya +1
We investigate the manifestation of the stripes in the in-plane resistivity anisotropy in untwinned single crystals of La_{2-x}Sr_{x}CuO_{4} (x = 0.02 - 0.04) and YBa_{2}Cu_{3}O_{y…
Unusual magnetic susceptibility anisotropy in untwinned La_{2-x}Sr_xCuO_4 single crystals in the lightly-doped region
A. N. Lavrov, Yoichi Ando, Seiki Komiya +1
We present a study of the magnetic susceptibility in carefully detwinned La_{2-x}Sr_{x}CuO_4 single crystals in the lightly-doped region (x=0-0.03), which demonstrates a remarkable…
Mobility of the Doped Holes and the Antiferromagnetic Correlations in Underdoped High-T_c Cuprates
Yoichi Ando, A. N. Lavrov, Seiki Komiya +2
The emergence and the evolution of the metallic charge transport in the La_{2-x}Sr_{x}CuO_{4} system from lightly- to optimally-doped samples (x = 0.01 - 0.17) are studied. We demo…
Ando, Lavrov, and Segawa Reply
Yoichi Ando, A. N. Lavrov, Kouji Segawa
Authors' Reply to the Comment by Janossy et al. [cond-mat/0005275] on our article, "Magnetoresistance Anomalies in Antiferromagnetic YBa_{2}Cu_{3}O_{6+x}: Fingerprints of Charged S…
Magnetotransport study of the charged stripes in high-T_c cuprates
Yoichi Ando, A. N. Lavrov, Kouji Segawa
We present a study of the in-plane and out-of-plane magnetoresistance (MR) in heavily-underdoped, antiferromagnetic YBa_{2}Cu_{3}O_{6+x}, which reveals a variety of striking featur…
Manifestations of the Charged Stripes in the Magnetoresistance of Heavily Underdoped YBa_2Cu_3O_{6+x}
A. N. Lavrov, Yoichi Ando, Kouji Segawa
We present a study of the in-plane and out-of-plane magnetoresistance (MR) in heavily-underdoped, antiferromagnetic YBa_2Cu_3O_{6+x}, which reveals a variety of striking features.…
Magnetoresistance in Heavily Underdoped YBa_2Cu_3O_{6+x}: Antiferromagnetic Correlations and Normal-State Transport
A. N. Lavrov, Yoichi Ando, Kouji Segawa +1
We report on a contrasting behavior of the in-plane and out-of-plane magnetoresistance (MR) in heavily underdoped antiferromagnetic (AF) YBa_2Cu_3O_{6+x} (x<0.37). The out-of-plane…
Magnetoresistance Anomalies in Antiferromagnetic YBa_2Cu_3O_{6+x}: Fingerprints of Charged Stripes
Yoichi Ando, A. N. Lavrov, Kouji Segawa
We report novel features in the in-plane magnetoresistance (MR) of heavily underdoped YBa_2Cu_3O_{6+x}, which unveil a developed ``charged stripe'' structure in this system. One of…
Resistive Transition and Upper Critical Field in Underdoped YBa_2Cu_3O_{6+x} Single Crystals
V. F. Gantmakher, G. E. Tsydynzhapov, L. P. Kozeeva +1
A superconducting transition in the temperature dependence of the ab-plane resistivity of underdoped YBa_2Cu_3O_{6+x} crystals in the range T_c<30 K has been investigated. Unlike t…
Normal-state resistivity anisotropy in underdoped RBa_2Cu_3O_{6+x} crystals
A. N. Lavrov, M. Yu. Kameneva, L. P. Kozeeva
We have revealed new features in the out-of-plane resistivity rho_c of heavily underdoped RBa_2Cu_3O_{6+x} (R=Tm,Lu) single crystals, which give evidence for two distinct mechanism…
Low-temperature resistivity of single crystals YBa_2Cu_3O_{6+x} in the normal state
V. F. Gantmakher, L. P. Kozeeva, A. N. Lavrov +4
A scan of the superconductor -- nonsuperconductor transformation in single crystals YBa_2Cu_3O_{6+x} (x about 0.37) was done in two alternative ways, namely, by applying the magnet…