@article{ISI:000416433000023,
 abstract = {We present the first observation of dynamically modulated quantum phase
transition between two distinct charge density wave (CDW) phases in
two-dimensional 2H-NbSe2. There is recent spectroscopic evidence for the
presence of these two quantum phases, but its evidence in bulk
measurements remained elusive. We studied suspended, ultrathin 2H-NbSe2
devices fabricated on piezoelectric substrates-with tunable flakes
thickness, disorder level, and strain. We find a surprising evolution of
the conductance fluctuation spectra across the CDW temperature: the
conductance fluctuates between two precise values, separated by a
quantum of conductance. These quantized fluctuations disappear for
disordered and on-substrate devices. With the help of mean-field
calculations, these observations can be explained as to arise from
dynamical phase transition between the two CDWstates. To affirm this
idea, we vary the lateral strain across the device via piezoelectric
medium and map out the phase diagram near the quantum critical point.
The results resolve a long-standing mystery of the anomalously large
spectroscopic gap in NbSe2.},
 article-number = {226802},
 author = {Kundu, Hemanta Kumar and Ray, Sujay and Dolui, Kapildeb and Bagwe, Vivas
and Choudhury, Palash Roy and Krupanidhi, S. B. and Das, Tanmoy and
Raychaudhuri, Pratap and Bid, Aveek},
 doi = {10.1103/PhysRevLett.119.226802},
 eissn = {1079-7114},
 issn = {0031-9007},
 journal = {PHYSICAL REVIEW LETTERS},
 month = {NOV 29},
 number = {22},
 orcid-numbers = {Raychaudhuri, Pratap/0000-0001-5239-3481
Bid, Aveek/0000-0002-2378-7980
Krupanidhi, Saluru B/0000-0001-6393-0908},
 researcherid-numbers = {Dolui, Kapildeb/S-4923-2019
Raychaudhuri, Pratap/I-5862-2016
Bid, Aveek/F-3076-2010
},
 times-cited = {6},
 title = {Quantum Phase Transition in Few-Layer NbSe2 Probed through Quantized
Conductance Fluctuations},
 unique-id = {ISI:000416433000023},
 volume = {119},
 year = {2017}
}